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1

UPb zircon and Rb-Sr mineral dating of eclogites and their country rocks. Example: Münchberg Gneiss Massif, Northeast Bavaria  

Microsoft Academic Search

In order to evaluate the usefulness of the U-Pb zircon suite method to date eclogitic rocks, zircon populations have been analyzed from two eclogites and one cogenetic metagabbro. Samples were taken from the Münchberg Gneiss Massif (northeast Bavaria) containing the largest B-type eclogite body [1] of the non-Alpine part of Central Europe. All nine analyzed grain size and magnetic fractions

D. Gebauer; M. Grünenfelder

1979-01-01

2

Fore-arc transcurrent faults in northeast Japan: hybrid geophysical models of an island-arc upper crust  

NASA Astrophysics Data System (ADS)

Origin of a conspicuous longitudinal geomagnetic anomaly on the fore-arc of northeast Japan, Kitakami magnetic belt (KMB), is investigated on the basis of fission-track dating, rock magnetic experiments, reflection seismic interpretation and potential field modeling. Radiometric ages suggest that the basement core samples obtained from the Numanohata SK-2D (southern Hokkaido) and Ministry of International Trade and Industry Kesennuma-Oki (Offshore Honshu) boreholes are part of the voluminous Cretaceous plutons in northeast Japan. Two-dimensional gravity models on fore-arc seismic profiles show that acoustic basement with geomagnetic anomaly has densities comparable with those of cored granites. Magnetic carrier of the granite is identified as multi-domain sized titanomagnetite. Strong thermoremanent magnetization (TRM) and high Qn ratios of the samples indicate significant contribution of TRM of the granitic basement as a source of observed anomaly. Conspicuous paired anomaly is caused by consistent normal remanence of the granitic basement acquired during the Cretaceous long normal chron (C34n). As a result of geomagnetic modeling, optimized direction of the remanence is characterized by westerly deflection and abnormally shallow inclination (<30°), which requires to restore the Kitakami massif (northern part of northeast Japan) to the south of southwest Japan. Significant northward translation since the Cretaceous may have been compensated by left-lateral motions on transcurrent faults along the Eurasian margin such as the Offshore Trend A identified in this study. Gravity modeling indicates that the basement off the Abukuma massif (southern part of northeast Japan), which does not show geomagnetic anomaly, consists of varied density blocks that are bounded by transcurrent faults.

Itoh, Y.; Nagasaki, Y.; Matsuda, T.

2000-12-01

3

Kondyor Massif, Russia  

NASA Technical Reports Server (NTRS)

This is neither an impact crater nor a volcano. It is a perfect circular intrusion, about 10 km in diameter with a topographic ridge up to 600 m high. The Kondyor Massif is located in Eastern Siberia, Russia, north of the city of Khabarovsk. It is a rare form of igneous intrusion called alkaline-ultrabasic massif and it is full of rare minerals. The river flowing out of it forms placer mineral deposits. Last year 4 tons of platinum were mined there. A remarkable and very unusual mineralogical feature of the deposit is the presence of coarse crystals of Pt-Fe alloy, coated with gold. This 3-D perspective view was created by draping a simulated natural color ASTER composite over an ASTER-derived digital elevation model.

The image was acquired on June 10, 2006, and is located at 57.6 degrees north latitude, 134.6 degrees east longitude.

The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

2008-01-01

4

The tectonics of anorthosite massifs  

NASA Technical Reports Server (NTRS)

Anorthosite massifs developed approximately 1.4 to 1.5 billion years ago along an arch which developed parallel to a zone of continental separation as a block which included North America, Europe, and probably Asia separated from a block which included parts of South America, Africa, India, and Australia. Anorthosite massifs also developed at the same time along a belt which runs through the continents which comprise Gondwanaland (South America), Africa, India, Australia, and Antarctica. This was a zone of continental separation which subsequently became a zone of continental collision about 1.2 billion years ago. The northern anorthosite belt also parallels an orogenic belt which was active between 1.8 and 1.7 billion years ago. Heat generated during this mountain building period helped in the formation of the anorthosites.

Seyfert, C. K.

1981-01-01

5

Cenozoic shelly sands in the Cotentin (Armorican Massif, Normandy, France): A record of Atlantic transgressions and intraplate Cenozoic deformations  

NASA Astrophysics Data System (ADS)

Three episodes of Cenozoic tidal shelly sands ('faluns'), dated to the Middle Eocene, Middle Miocene, and Plio-Pleistocene, were deposited by transgressions over the Northeast of the Armorican Massif (Cotentin, Normandy, France) during highstand eustatic sea levels. These shelly calcareous sands and gravels were deposited behind Palaeozoic rocky shoals that separate the Cotentin Basin from the Atlantic Ocean. The morphology of the Cotentin Basin persisted through the Palaeogene and Neogene times with smooth slopes, despite the Cenozoic eustatic sea-level fluctuations and uplifts that affected the Armorican Massif and its borders.

Dugué, Olivier; Auffret, Jean-Paul; Poupinet, Nicole

2007-02-01

6

Geomagnetic and gravity modeling of the fore-arc shelf of North-east Japan  

NASA Astrophysics Data System (ADS)

Northeast Japan is one of the continental slivers of the Eurasian Continent rifted by the Miocene fan-shaped genesis of the Japan Sea. A pair of longitudinal geomagnetic anomalies are traced along the Pacific coast of Northeast Japan. Basement core samples obtained from MITI Kesennuma-Oki well drilled on the southernmost part of anomaly belt are examined. The basement, which is identified as biotite granite and characterized by sheared fabric, shows early Cretaceous radiometric ages. Through rock-magnetic experiments, it was confirmed that the granitic basement holds thermoremanent magnetization (TRM) strong enough to cause the observed anomaly with a minor contribution from induced magnetization. The carrier of TRM is multi-domain titanomagnetite. On the basis of experimental results, two-dimensional geomagnetic and gravity modeling for semi-infinite magnetized polygons have been constructed along two E-W seismic lines on the fore-arc shelf of Northeast Japan. Vector components of magnetization are tuned through fitting anomaly peaks caused by basement topography, delineated by seismic survey. As for the northern part of study area, the inclination of westerly deflected magnetization vector should be 30° or smaller, the amount required to restore the Cretaceous Northeast Japan to the south of Southwest Japan. The gravity model for the same lines as the geomagnetic modeling suggests that fore-arc basement off the northern Kitakami Terrane consists of granitic rocks, except for a conspicuous basalt, whereas the non-magnetic basement off the southern Abukuma Terrane consists of a variety of blocks of different density. The anomalous direction of remanent magnetization and variety in gravity data are linked to NNW-SSE sinistral transcurrent faults activated throughout the Paleogene.

Itoh, Yasuto; Nagasaki, Yasuhiko; Matsuda, Takaaki

1998-04-01

7

The Lassell Massif - a Silicic Lunar Volcano  

NASA Astrophysics Data System (ADS)

Lunar volcanic processes were dominated by mare-producing basaltic extrusions. However, limited occurrences of non-mare, geochemically evolved (Si-enriched) volcanic deposits have long been suspected on the basis of spectral anomalies (red spots), landform morphologies, and the occurrence of minor granitic components in Apollo sample suites [e.g., 1-5]. The LRO Diviner Lunar Radiometer Experiment (Diviner) measured thermal emission signatures considered diagnostic of highly silicic rocks in several red spot areas [6,7], within the Marius domes [8], and from the Compton-Belkovich feature on the lunar farside [9]. The present study focuses on the Lassell massif red spot (14.73°S, 350.97°E) located in northeastern Mare Nubium near the center of Alphonsus A crater. Here we use Diviner coverage co-projected with Lunar Reconnaissance Orbiter Camera (LROC) images [10] and digital elevation models to characterize the Lassell massif geomorphology and composition. Localized Diviner signatures indicating relatively high silica contents correlate with spatially distinct morphologic features across the Lassell massif. These features include sub-kilometer scale deposits with clear superposing relationships between units of different silica concentrations. The zone with the strongest signal corresponds to the southern half of the massif and the Lassell G and K depressions (formerly thought to be impact craters [11]). These steep-walled pits lack any obvious raised rims or ejecta blankets that would identify them as impact craters; they are likely explosive volcanic vents or collapse calderas. This silica-rich area is contained within the historic red spot area [4], but does not appear to fully overlap with it, implying compositionally distinct deposits originating from the same source region. Low-reflectance deposits, exposed by impact craters and mass wasting across the massif, suggest either basaltic pyroclastics or minor late-stage extrusion of basaltic lavas through vents within the structure. The Lassell massif is thus a volcanic construct with a range of silica concentrations. Based on landform morphology, some deposits appear enriched enough in silica to affect magma viscosity, the character of extrusion, and edifice construction. Stratigraphic relationships between the massif and surrounding deposits suggest that at least some volcanic activities associated with the massif occurred after mare emplacement. Together with volcanic features in the surrounding region, a compositionally and temporally complex volcanic history is supported for this portion of Mare Nubium. Magma production, extrusion, and timing of emplacement models would benefit from petrologic studies of new samples returned from this region. References: [1] Hagerty J. J. et al., (2006) JGR 111 (E06002). [2] Wagner R. et al., (2010) JGR 115 (E06015). [3] Wood C. A. and Head III J. W. (1975) Conf. on Origins of Mare Basalts, Lunar Sci. Inst., Houston, TX. [4] Whitaker E. A. (1972) Apollo 16 Prelim. Sci. Rpt. NASA SP-315, pp. 29-104 to 29-105. [5] Jolliff B. L. et al., (1991) Lunar Planet. Sci. Conf. XXI, 101-118. [6] Glotch T. D. et al., (2010) Science 329, 1510-1513. [7] Greenhagen B. T. et al., (2010) Science 329, 1507-1509. [8] Glotch T. D. et al., (2011) GRL, 38(L21204). [9] Jolliff B. L. et al., (2011) Nat Geosci. 4. [10] Robinson M. S. et al., (2010) Space Sci. Rev. 150(1-4), 81-124. [11] Wilhelms D. E. (1972) USGS Map I-722.

Ashley, J.; Robinson, M. S.; Stopar, J. D.; Glotch, T. D.; Hawke, B. R.; Lawrence, S. J.; Jolliff, B. L.; Greenhagen, B. T.; Paige, D. A.

2013-12-01

8

Experimental and Modeling Studies of Massif Anorthosites  

NASA Technical Reports Server (NTRS)

This termination report covers the latter part of a single research effort spanning several grant cycles. During this time there was a single title, "Experimental and Modeling Studies of Massif Anorthosites", but there were several contract numbers as the mode and location of NASA contract administration changed. Initially, the project was funded as an increment to the PI's other grant, "Early Differentiation of the Moon: Experimental and Modeling Studies", but subsequently it became an independent grant. Table 1 contains a brief summary of the dates and contract numbers.

Longhi, John

1999-01-01

9

Structures along the contact zone between the Lycian nappes and the Menderes Massif, SW Turkey: Implications for tectonic transport directions of the Lycian nappes  

NASA Astrophysics Data System (ADS)

Structural data recorded along the contact zone between the Menderes Massif and the overlying Lycian nappes provide information about tectonic transport directions of the Lycian nappes in southwestern Turkey. Key units were investigated in the Milas region. Flysch-type sedimentary rocks form the uppermost unit of the Menderes Massif. Metapelites and metapsammites form the basal unit of the Lycian nappes. The metasediments of the Lycian nappes overlie the Menderes Massif along a south-dipping, low-angle tectonic contact, along which thin slices of sheared serpentinite are found. The kinematic data suggest the presence of three deformation phases in the Milas region. The first deformation phase (D1) is characterised by a ductile deformation with top-to-the-NE sense of shear suggesting that the lowermost unit of the Lycian nappes was emplaced initially from southwest to northeast onto the Menderes Massif during the Early Eocene. The second deformation phase (D2) is also ductile in nature. It is characterised by an E-W-trending stretching lineation with a bivergent sense of shear, which is probably related to the load of the overlying nappes. A third deformation phase (D3) is characterised by south-dipping normal faults with top-to-the-S sense of movement and can be related to southward movement of the Lycian nappes along a low-angle décollement zone.

Arslan, Arzu; Güngör, Talip; Erdo?an, Burhan; Passchier, Cees W.

2010-05-01

10

Neogene exhumation history of the Mont Blanc massif, western Alps  

NASA Astrophysics Data System (ADS)

The contribution of climate and tectonics to the Neogene exhumation history of the European Alps is studied in the Mont Blanc (MB) massif using low-temperature thermochronology. Apatite fission track and (U-Th-[Sm])/He data suggest that the MB massif was exhumed episodically: Rapid exhumation (2.5 ± 0.5 km/Ma) before 6 Ma is followed by an episode of slow exhumation and a period of accelerated exhumation (>1 km/Ma) after ˜3 Ma. Comparing the exhumation rates of the MB massif with reported exhumation rates of all other external crystalline massifs (ECM) shows that the MB massif is the only ECM that experienced rapid exhumation before 6 Ma, which is possibly related to NW and minor SE directed thrusting of the MB massif. The data demonstrate that the Messinian base level drop (˜5.5 Ma) and the increase in atmospheric moisture caused by an intensification of the Atlantic Golf Stream (4.6 Ma) did not affect the exhumation of the external Alps. All ECM, except the Gotthard massif, show an increase in exhumation rates at ˜3 Ma. We interpret this as the result of normal faulting along orogen-parallel faults and beginning Alpine glaciation. The relative impact of these processes on the exhumation of the ECM can vary spatially and temporally, mainly depending on differences in geology and geomorphology. In the case of the MB massif we propose that the acceleration in exhumation rates at ˜3 Ma is caused by rapid valley incision related to glaciation, and that the recent relief of the MB massif is thus a young feature.

Glotzbach, C.; Reinecker, J.; DanišíK, M.; Rahn, M.; Frisch, W.; Spiegel, C.

2008-08-01

11

NORTHEAST CLIMATE DATA  

EPA Science Inventory

The Northeast Regional Climate Center (NRCC) database includes a complete collection of historical climate data for the northeastern United States as well as continually updated National Weather Service observations and forecasts. In addition, daily temperature and precipitation ...

12

Spatial thermal radiometry contribution to the Massif armoricain and the Massif central (France) litho-structural study  

NASA Technical Reports Server (NTRS)

The author has identified the following significant results. Although the limited number of images received did not permit construction of a thermal inertia map, important geological details were obtained in the areas of lithology and tectonics. Interpretation of day, night, and seasonal imagery resulted in differentiating broad calcareous and dolomitic units in the Causse Plateau. In the Massif amoricain, some granite massifs were delineated which were not observed by LANDSAT. Neotectonic faults were also revealed.

Scanvic, J. Y. (principal investigator)

1980-01-01

13

Northeast Biomanufacturing Jobs  

NSDL National Science Digital Library

The Northeast Biomanufacturing Center and Collaborative (NBC2) has created this page to both distribute news on the biomanufacturing field and provide information on specific job opportunities in the Northeast. The news articles all present positive information about biomanufacturing such as articles titled "Obama to Launch Manufacturing Initiative" and "Biomed industry growing." For assistance with job searching, a collection of links to approximately thirty biomanufacturing companies' job listings are included. Lastly, links to major internet job boards are included.

2011-10-26

14

5. INTERIOR OF NORTHEAST ROOM AND MEZZANINE, NORTHEAST VIEW OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. INTERIOR OF NORTHEAST ROOM AND MEZZANINE, NORTHEAST VIEW OF (HOISTS IN CENTER). - Vanadium Corporation of America (VCA) Naturita Mill, Sampling Building & Ore Receiving Platform, 3 miles Northwest of Naturita, between Highway 141 & San Miguel River, Naturita, Montrose County, CO

15

OBLIQUE VIEW OF THE NORTHEAST SIDE AND NORTHEAST BACK OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

OBLIQUE VIEW OF THE NORTHEAST SIDE AND NORTHEAST BACK OF BUILDING 13, FACING SOUTH. - Southern Branch of the National Home for Disabled Volunteer Soldiers, Building 13, Harris Avenue at its intersection of Black Avenue and Woodfin Street, Hampton, Hampton, VA

16

Northeast Regional Climate Center  

NSDL National Science Digital Library

NOAA's Northeast Regional Climate Center (NRCC): Climate Data and Products Web site is part of the nationwide network that provides "convenient and timely access to accurate and reliable climate information." The Web sites are described as being "available to assist in interpreting present conditions, quantifying climate variability, and assessing the likelihood of extreme weather events that often produce major social, economic and environmental impacts in a region." Following this charge, this site provides Comparative Climatic Data for the US; Current Weather Conditions Around the Northeast (from Unisys); specific data about Ithaca, NY's Climate; and NRCC Research Reports. If you happen to be looking for various types of climatic information or data for the Northeast, this is a great place to start.

17

(222)Rn activity concentration differences in groundwaters of three Variscan granitoid massifs in the Sudetes (NE Bohemian Massif, SW Poland).  

PubMed

Based on research conducted in three Variscan granitoid massifs located within the crystalline Bohemian Massif, the authors confirmed that the higher the degree of their erosional dissection, the smaller the concentration of (222)Rn in groundwaters circulating in these massifs. This notion implies that radon waters and high-radon waters, from which at least some of the dissolved radon should be removed before feeding them as drinking water to the water-supply system, could be expected in granitoid massifs which have been poorly exposed by erosion. At the same time, such massifs must be taken into account as the areas of possible occurrence of radon medicinal waters, which in some countries can be used for balneotherapy in health resorts. Slightly eroded granitoid massifs should be also regarded as very probable radon prone areas or areas of high radon potential. PMID:24657989

Przylibski, Tadeusz A; Gorecka, Joanna

2014-08-01

18

Finnish Higher Education in Transition: Perspectives on Massification and Globalisation.  

ERIC Educational Resources Information Center

This book discusses recent changes in Finnish higher education, pinpointing the changes and analyzing what they mean. The chapters are: (1) "GeoPolitical and Cultural Coordinates for Finnish History" (Jussi Valimaa); (2) "A Historical Introduction to Finnish Higher Education" (Jussi Valimaa); (3) "Analysing Massification and Globalisation" (Jussi…

Valimaa, Jussi, Ed.

19

Cenozoic alkaline volcanism of the Atakor massif, Hoggar, Algeria  

Microsoft Academic Search

The Atakor massif is a part of the Hoggar volcanic province, which was emplaced on top of a basement swell initiated during the Cretaceous. There have been three main episodes of volcanic activity since the Miocene, separated by long periods of qui- escence. The lava fl ows and domes were emitted along lithosphere-scale fault zones. With its famous scenery, the

Abla Azzouni-Sekkal; Bernard Bonin; Amel Benhallou; Rachid Yahiaoui; Jean-Paul Liégeois

2007-01-01

20

Geological and Geophysical Investigations at Sierra del Medio Massif - Argentine.  

National Technical Information Service (NTIS)

Geological investigations were performed at Sierra del Medio (Chubut Province), a mountainous massif of about 25 km by 8 km of migmatic origin, which emerges from a depressed tectonic trench or graben called Pampa de Gastre. The most ancient rocks belong ...

J. C. Perucca E. Llambias H. H. Puigdomenech E. Cebrelli C. E. Castro

1987-01-01

21

Pre-School Education in the Massif Central (France).  

ERIC Educational Resources Information Center

This paper lists and tentatively assesses three experiments in preschool education in rural areas in France, and outlines the Massif Central development program which draws extensively on these experiments. In Experiment I, a peripatetic teacher worked with young children, concentrating on speech activities in four different single-class schools.…

Serna, Emile

22

Northeast Sustainable Energy Association  

NSDL National Science Digital Library

Northeast Sustainable Energy Association (NSEA), a chapter of the American Solar Energy Society, is an organization for northeastern United States focused on "promoting the understanding, development, and adoption of energy conservation and non-polluting, renewable energy technologies." NSEA promotes the use of electricity produced through sustainable and non-polluting methods, as well as green transportation and building construction and design through advocacy and education. The NSEA Web site offers some useful tools for homeowners and teachers alike. These include Information About Sustainable Transportation, energy conservation tips, and selected articles from the Northeast Sun (published quarterly). Also available are resources and publications for educators; however, some things are not freely available on the Web and must be ordered from the NSEA.

2001-01-01

23

Northeast Arabia Terra  

NASA Technical Reports Server (NTRS)

MGS MOC Release No. MOC2-466, 28 August 2003

Northeast Arabia Terra is a heavily cratered region that has undergone considerable erosion. The erosion has exposed filled, buried meteor impact craters; it has also eroded craters down so that all that remains is the former floor of a crater. This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows some of the eroded terrain in northeast Arabia Terra near Huo Hsing Vallis. The terrain is layered, and these layers have been eroded. The dark feature toward the lower left may be the remains of a crater floor--the entire crater and the rock into which it formed have all been stripped away. This image is located near 29.6oN, 292.8oW. The picture covers an area 3 km (1.9 mi) across and is illuminated from the lower left.

2003-01-01

24

Northeast Coast, Hokkaido, Japan  

NASA Technical Reports Server (NTRS)

The northeast coast of Hokkaido and Kunashir Island, Japan (44.0N, 143.0E) are seen bordered by drifting sea ice. The sea ice has formed a complex pattern of eddies in response to surface water currents and winds. Photos of this kind aid researchers in describing local ocean current patterns and the effects of wind speed and direction on the drift of surface material, such as ice floes or oil. Kunashir is the southernmost of the Kuril Islands.

1992-01-01

25

Northeast Regional Biomass Program  

SciTech Connect

The Northeast Regional Biomass Program has been in operation for a period of nine years. During this time, state managed programs and technical programs have been conducted covering a wide range of activities primarily aim at the use and applications of wood as a fuel. These activities include: assessments of available biomass resources; surveys to determine what industries, businesses, institutions, and utility companies use wood and wood waste for fuel; and workshops, seminars, and demonstrations to provide technical assistance. In the Northeast, an estimated 6.2 million tons of wood are used in the commercial and industrial sector, where 12.5 million cords are used for residential heating annually. Of this useage, 1504.7 mw of power has been generated from biomass. The use of wood energy products has had substantial employment and income benefits in the region. Although wood and woodwaste have received primary emphasis in the regional program, the use of municipal solid waste has received increased emphasis as an energy source. The energy contribution of biomass will increase as potentia users become more familiar with existing feedstocks, technologies, and applications. The Northeast Regional Biomass Program is designed to support region-specific to overcome near-term barriers to biomass energy use.

Lusk, P.D.

1992-12-01

26

New thermochronological constraints for the exhumation of the Aiguilles Rouges massif, Western Alps  

NASA Astrophysics Data System (ADS)

During Oligo-Miocene times, the proximal part of the European passive margin underwent collisional shortening. In the outermost part of the Alpine arc, this shortening occurred in the fold-and-thrust belts (Bornes, Bauges, Chartreuse and Vercors massifs) with no significant tectonic burial. In the External Crystalline Massifs (ECM: Mont Blanc, Aiguilles Rouges, Belledonne, Oisans massifs) the crust was buried at mid-crustal depths below the internal units at 35 to 30 Ma. Along the ECORS profile, the timing of the Mont Blanc massif deformation and exhumation is now well constrained. However, the exhumation of the Aiguilles Rouges massif is much less constrained and this led to various and contrasting interpretations in terms of structural style and sequence of shortening. In this contribution, we present a new thermochronological dataset of the southern part of the Aiguilles Rouges massif. (U-Th-Sm)/He ages on zircons were obtained on three different elevation profiles. Preliminary results indicate ages around 7-8 Ma, which are consistent with Apatite Fission Track data. Those results will allow us to better constrain the timing of the Aiguilles Rouges massifs exhumation relative to the Mont Blanc massif and decipher whether these massifs are deformed in the forward sequence or not, if there were some out-of-sequence major shear zones/thrusts, or if these massifs were deformed sub-coevally. This has major implications in terms of both Alpine collisional wedge kinematics and crustal rheology of the European margin during the Tertiary collision.

Boutoux, Alexandre; Bellahsen, Nicolas; Pik, Raphael; Rolland, Yann; Verlaguet, Anne; Lacombe, Olivier

2014-05-01

27

Fluid circulation systems in the Alpine External Crystalline Massifs  

NASA Astrophysics Data System (ADS)

At mid-crustal levels, rock permeability is believed to be very low except in active fault/shear zones. In sedimentary rocks undergoing tectonic burial during collisional shortening, fluid flow is thus considered to be a small-scale process restricted to the sedimentary unit, until the fluid system locally opens during strain localization in fault/shear zones. During the Alpine collision, the European proximal passive margin (Dauphinois/Helvetic domains, including the External Crystalline Massifs, ECM: Aar, Mont Blanc, Aiguilles Rouges, Oisans massifs) was buried at mid-crustal depth under the internal units and was subsequently shortened and exhumed with contrasting kinematics. Indeed, some of the main tectonic units are sedimentary nappes detached from their basement while other are linked to main basement shear zones. In this context, many studies of fluid system evolution have been published, mainly focused on the largest tectonic units (e.g., Morcles nappe) and/or on thrust/shear zones with large displacement (e.g., Glarus thrust). In this contribution, we focused on tectonic structures located in the Oisans massif where small amount of shortening occurred (smaller than in the northern ECM, Mont Blanc and Aar). We performed geochemical and microthermometric analyses on calcite + quartz vein and host-rock samples to document and discuss the fluid source and pathway, the scale of circulation and the fluid-rock interactions. The fluid system in the Oisans ECM is compared to the fluid systems in other ECM and can be considered as an early and/or less shortened analogue. In the Oisans massif cover, the fluid system is generally closed, except locally above the main basement shear zones where signatures of basement-derived fluids were identified by trace element analysis. In contrast, in the Mont Blanc massif, fluids were channelized in the main basement shear zones, while in the Morcles nappe (i.e., the presumable cover of the Mont Blanc), deep fluids may have been channelized in the sheared reverse limb. Further north, in the Glarus thrust (i.e., the largest shear zone of the Aar massif), deep fluids were clearly channelized in the thrust zone. This highlights the influence on fluid systems of both the structural style and the amount of shortening that vary along the strike of the External Alps.

Boutoux, Alexandre; Bellahsen, Nicolas; Verlaguet, Anne; Lacombe, Olivier

2014-05-01

28

30. NORTHEAST TO BLACKSMITH SHOP AREA IN NORTHEAST CORNER OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

30. NORTHEAST TO BLACKSMITH SHOP AREA IN NORTHEAST CORNER OF FACTORY. A BENCH VICE STANDS IN LEFT FOREGROUND IN FRONT OF THE HOODED FORGE. MOUNTED ON THE WORK BENCH IS THE MAIN CASTING FROM AN ELI WINDMILL, USED AS A JIG TO SUPPORT PARTS DURING THE BABBITT BEARING POURING OPERATION. - Kregel Windmill Company Factory, 1416 Central Avenue, Nebraska City, Otoe County, NE

29

29. Photocopy of photograph. VIEW, LOOKING NORTHEAST, OF NORTHEAST SECTION ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

29. Photocopy of photograph. VIEW, LOOKING NORTHEAST, OF NORTHEAST SECTION OF THE STRUCTURE, SHOWING ORIGINAL WOOD DECK, RAILING AND EARLY 1930'S PACKARD AUTOMOBILE IN BACKGROUND. Photographer unknown, date unknown. (Print in possession of the Washington County Highway Department). - Hegeman-Hill Street Bridge, Spanning Batten Kill, .65 mile West of Greenwich, Easton, Washington County, NY

30

2. SOUTHWEST VIEW OF NORTH SIDE (NORTHEAST CORNER).. THE NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. SOUTHWEST VIEW OF NORTH SIDE (NORTHEAST CORNER).. THE NORTHEAST SIDE OF THE MINE OFFICE IS IN THE BACKGROUND. - Juniata Mill Complex, Mill Camp Shed, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

31

Miocene mass-transport sediments, Troodos Massif, Cyprus  

USGS Publications Warehouse

Sediment mass-transport layers of submarine origin on the northern and southern flanks of the Troodos ophiolitic massif are dated biostratigraphically as early Miocene and late Miocene, respectively and therefore represent different seismogenic events in the uplift and erosional history of the Troodos terrane. Analysis of such events has potential for documenting Miocene seismic and uplift events regionally in the context of changing stress field directions and plate vectors through time. ?? 2009 The Geologists' Association.

Lord, A. R.; Harrison, R. W.; BouDagher-Fadel, M.; Stone, B. D.; Varol, O.

2009-01-01

32

The French Atlantic littoral and the Massif Armoricain, part 3  

NASA Technical Reports Server (NTRS)

The author has identified the following significant results: (1) An original map of lineaments of the Armorican Massif and the Vendean platform was prepared. (2) Validity of spatial information through comparison with maps of various kinds, such as geological, geophysical, morphological, etc., was verified. (3) It was confirmed that LANDSAT images, in many cases, reflect data on deep phenomena which were only accessible geophysically and by means of borings. Tectonic domains were outlined, and known lineaments were extended.

Verger, F. (principal investigator); Scanvic, J. Y.; Monget, J. M.

1977-01-01

33

Volcanoes of the Tibesti massif (Chad, northern Africa)  

Microsoft Academic Search

The Tibesti massif, one of the most prominent features of the Sahara desert, covers an area of some 100,000 km2. Though largely absent from scientific inquiry for several decades, it is one of the world’s major volcanic provinces, and\\u000a a key example of continental hot spot volcanism. The intense activity of the TVP began as early as the Oligocene, though the

Jason L. Permenter; Clive Oppenheimer

2007-01-01

34

Northeast Document Conservation Center  

NSDL National Science Digital Library

Founded in 1973, the Northeast Document Conservation Center (NDCC) was created to address the rapid deterioration of older paper-based documents in a number of institutions across New England. On their website, visitors can learn about their conservation and imaging services, and also examine some of their fine resources intended for members of the preservation community. The "Resources" area is a good place to start, as it contains a number of suggestions for preserving private and family collections and also contains a set of additional web-based resources and links. Beyond those materials, there are a number of digitized leaflets here, such as "Assessing Preservation Needs: A Self-Survey Guide" and "Preservation of Library and Archival Materials". The site is rounded out by an excellent disaster assistance section that includes an online disaster planning tool called "dPlan" and a set of general guidelines for archival institutions that may be coping with such situations.

35

Social Class Barriers of the Massification of Higher Education in Taiwan  

ERIC Educational Resources Information Center

In recent years, the rapid growth of higher education in Taiwan has led to an essential shift from education for the elite to the massification of higher education. Although this massification is making higher education more accessible, one of the main concerns is whether opportunities for higher education are the same among all social classes in…

Ru-Jer, Wang

2012-01-01

36

The Logar ultrabasite massif and its reflection in the magnetic field (East Afghanistan)  

NASA Astrophysics Data System (ADS)

The paper deals with the structural position of the Logar ultrabasite massif with respect to the folded Kabul block. The ultrabasite is composed of a thick tectonic mantle in the ophiolite belt in the northern portion of south eastern Afghanistan. Magnetometric data together with geological investigations make it possible to understand the tectonic nature of the massif contacts.

Shareq, Abdullah; Voinov, V. N.; Nevretdinov, E. B.; Kubatkin, L. V.; Gusav, I. A.

1980-02-01

37

Mohorovicic discontinuity depth analysis beneath North Patagonian Massif  

NASA Astrophysics Data System (ADS)

The North Patagonian Massif is a 100000 km2, sub-rectangular plateau that stands out 500 to 700 m higher in altitude than the surrounding topography. The creation of this plateau took place during the Oligocene through a sudden uplift without noticeable internal deformation. This quite different mechanical response between the massif and the surrounding back arc, the short time in which this process took place and a regional negative Bouguer anomaly in the massif area, raise the question about the isostatic compensation state of the previously mentioned massif. In the present work, a comparison between different results about the depth of the Mohorovicic discontinuity beneath the North Patagonian Massif and a later analysis is made. It has the objective to analyze the crustal thickness in the area to contribute in the determination of the isostatic balance and the better understanding of the Cenozoic evolution of the mentioned area. The comparison is made between four models; two of these were created with seismic information (Feng et al., 2006 and Bassin et al., 2000), another model with gravity information (Barzaghi et al., 2011) and the last one with a combination of both techniques (Tassara y Etchaurren, 2011). The latter was the result of the adaptation to the work area of a three-dimensional density model made with some additional information, mainly seismic, that constrain the surfaces. The work of restriction and adaptation of this model, the later analysis and comparison with the other three models and the combination of both seismic models to cover the lack of resolution in some areas, is presented here. According the different models, the crustal thickness of the study zone would be between 36 and 45 Km. and thicker than the surrounding areas. These results talk us about a crust thicker than normal and that could behave as a rigid and independent block. Moreover, it can be observed that there are noticeable differences between gravimetric and seismic models in the North Patagonian Massif area and in its West boundary but almost any difference in the other geographical limits. It is an interesting result and could be related with the isostatic compensation state of the area. References: Barzaghi R., Borghi A., Reguzzoni M., Sampietro D. Global Moho Estimate from GOCE Space-Wise Solution and a Local Application in the Mediterranean Area Bassin, C., Laske, G. and Masters, G., The Current Limits of Resolution for Surface Wave Tomography in North America, EOS Trans AGU, 81, F897, 2000. Feng M., Van der Lee S., Assumpçao M.. Upper mantle structure of South America from joint inersion of waveforms and fundamental mode group velocities of Rayleigh waves. Journal of Goephysical Research, vol. 112, B04312, doi:10.1029/2006JB004449,2007 Tassara A., A. Echaurren, 2011. Anatomy of the Chilean Subduction Zone: Three-dimensional density model upgraded and compared against global-scale models. Geophysical journal international, doi: 10.1111/j.1365-246X.2012.05397.x

Gómez Dacal, M. L.; Tocho, C.; Aragón, E.

2013-05-01

38

Impact Induced Surface Wave Propagation In Concrete Massif  

NASA Astrophysics Data System (ADS)

Experimental inspection of large concrete massifs was carried out. The concrete massif was excited by the light impact of metallic road, falling from the height 50 cm. The most energy (60-70)% from that impact goes for surface wave excitation in concrete. They are vertical polarized Relay waves, propagating in concrete, deeps till (0, 5 - 0, 7) ?, where ? is wave length of excited oscillations. Wave frequencies from the impact source in object under research are 2-4 kHz; they are frequencies of acoustic emission (AE) of moving metal about grainy surface. The mechanism of low-frequency acoustic emission in grainy materials is known as f = V/d, (V velocity of displacement [m/s] divide to length of displacement, [m]. In granular materials the diameter of grain is the determine length of displacement, That is simple, convenient nondestructive method for Relay wave excitation for inspection and monitoring of large surfaces of granular materials. Propagation of shock-induced surface wave for the distance of 50 m is observed. The velocity of propagation of vertically polarized Raleigh waves reflects the fractures inside the concrete body-the smaller is the wave velocity, the higher is the crack concentration. It speaks nonlinearity of surface wave propagation. Assessment of surface wave propagation velocity V and Q-factor sensitivity to structural changes is made. Q-Factor sensitivity is higher and applicability wider than that for surface waves.

Vilchinska, Nora A.

2008-06-01

39

Structural investigations in the Massif-Central, France  

NASA Technical Reports Server (NTRS)

This survey covered the French Massif-Central (where crystalline and volcanic rocks outcrop) and its surrounding sedimentaries, Bassin de Paris, Bassin d'Aquitaine and Rhodanian valley. One objective was the mapping of fracturing and the surveying of its relationship with known ore deposits. During this survey it was found that ERTS imagery outlines lithology in some sedimentary basins. On the other hand, in a basement area, under temperature climate conditions, lithology is rarely expressed. These observations can be related to the fact that band 5 gives excellent results above sedimentary basins in France and generally band 7 is the most useful in a basement area. Several examples show clearly the value of ERTS imagery for mapping linear features and circular structures. All the main fractures are identified with the exception of new ones found both in sedimentaries and basement areas. Other interesting findings concern sun elevation which, stereoscopic effect not being possible, simulates relief in a better way under certain conditions.

Scanvic, J. Y.

1974-01-01

40

Petrogenesis of massif anorthosites: a perspective from St. Urbain, Quebec  

SciTech Connect

The St. Urbain massif is a post-orogenic anorthosite pluton (approx. 500 km/sup 2/) emplaced within the central high-grade granulite terrain of the Grenville structural province. In contrast to other Grenville anorthosites, primary magmatic features are largely preserved. The massif consists predominantly of andesine anorthosite (AA) of remarkable purity containing abundant plagioclase megacrysts. AA has high K/sub 2/O (approx. 2 wgt.%), very high Sr contents (approx. 1200 ppm) and highly fractionated, low REE contents. Features of AA provide the following insights into anorthosite origins: (1) Crystallization from anorthositic magmas, as evidenced by early crystallization of abundant antiperthitic plag, and igneous emplacement of AA dikes and veins into older, unrelated labradorite anorthosite; (2) in situ crystallization of pyroxene after plag, with no direct evidence of earlier crystallization of mafic minerals from a basaltic parent magma; (3) limited differentiation during crystallization, indicated by small variation in plag and opx and limited variations in plag Sr and REE contents; (4) the involvement of water, suggested by the late igneous crystallization of biotite and the localized grain-boundary replacement of plag by calcic myrmekite (An/sub 80/ + qtz). (5) high temperature, relatively oxidizing conditions, indicated by magmatic hemoilmenite +/- rutile and rare ferropseudobrookite in AA and associated ores. AA crystallized from highly feldspathic, relatively oxidized, somewhat hydrous parent magma with little trapped melt. The development of a hyperfeldspathic parent magma with the requisite geochemical features can be ascribed to hydrous partial melting of mafic (to intermediate) rocks at deep crustal or greater depths, leaving a garnetiferous residue.

Gromet, L.P.; Dymek, R.F.

1985-01-01

41

The exhumation of an HP ophiolitic massif (Voltri Massif, Western Alps): insight from 3D numerical models  

NASA Astrophysics Data System (ADS)

The high-pressure ophiolitic Voltri Massif outcrops at the eastern sector of the Ligurian Western Alps. Highly deformed serpentinite and metasediments wrap eclogite to blueschist facies metagabbro and metabasalt bodies; these lenses have foliated rims and preserve undeformed textures in their cores revealing a strong strain-partitioning. The mechanism that drove the exhumation of these high-pressure rocks has been already analyzed in detail using 2D numerical simulations (Malatesta et al., 2011). In particular they reproduce the subduction process that in the Mesozoic affected the Alpine branch of the Western Tethys. In the Ligurian area subduction was intraoceanic and involved a non-layered oceanic lithosphere with gabbro as discrete bodies inside serpentinized peridotites that were overlain by a limited basaltic cover. The comparison of field and petrologic evidence with model results showed that the exhumation of the high-pressure Voltri rocks was related to the formation of a serpentinite channel above the downgoing slab. This low-viscosity area formed after the hydration of the mantle-wedge rocks by the uprising fluids that migrate from the slab. Buoyancy of the high-pressure serpentinitic mélange that included slices of the slab finally triggered their exhumation. Alpine subduction was however oblique (Marroni and Treves, 1998; Malusà et al., 2011) thus including a trench-parallel left-lateral motion and not only a trench-normal motion as in 2D simulations. We have studied this particular setting through 3D numerical simulations starting from the setup of 2D models. We therefore designed an oceanic basin (500 km-wide) surrounded by continental margins and floored by a non-layered oceanic lithosphere. Subduction starts at a prescribed weak zone in the mantle; the weak zone defines the plate margins geometry. We test different "lateral" geometries of the weak zone (e.g. continuous, segmented). We designed "continuous" weak zones either parallel or increasingly moving away from the continental margins. Moreover, we tested the effect on subduction/exhumation dynamics of varying values of the trench-parallel component of convergence-rate vector. The comparison among field and petrologic data of the Voltri Massif rocks with 3D numerical models results will finally provide a more detailed description of the subduction dynamics acting in the Ligurian-Piedmontese basin and in particular will shed more light on the mechanism that drove the exhumation of the high-pressure ophiolitic Voltri Massif.

Malatesta, C.; Gerya, T.; Crispini, L.; Federico, L.; Scambelluri, M.; Capponi, G.

2012-04-01

42

Deposit Model for Magmatic Iron-Titanium-Oxide Deposits Related to Proterozoic Massif Anorthosite Plutonic Suites.  

National Technical Information Service (NTIS)

This descriptive model for magmatic iron-titanium-oxide (Fe-Ti-oxide) deposits hosted by Proterozoic age massif-type anorthosite and related rock types presents their geological, mineralogical, geochemical, and geoenvironmental attributes. Although these ...

D. L. Fey L. G. Woodruff S. W. Nicholson

2013-01-01

43

Drainage network geometry versus tectonics in the Argentera Massif (French–Italian Alps)  

Microsoft Academic Search

The Argentera Massif (French–Italian Alps), with its uniform lithology, was selected to evaluate how known Plio–Pleistocene tectonics have conditioned the drainage network geometry. The drainage network was automatically derived and ordered from a 10 m-resolution DEM. On hillshade images, alignments of morphological features were identified. The Massif was subdivided into 22 domains of 50 km2 within which the directions of every river

Adriano Ribolini; Matteo Spagnolo

2008-01-01

44

Recent geodynamic pattern of the eastern part of the Bohemian Massif  

NASA Astrophysics Data System (ADS)

The Bohemian Massif, a Precambrian cratonic terrane, had been affected by several orogeneses forming its tectonic pattern. To detect the recent geodynamic motions going on fundamental geological structures of the Massif four regional geodynamic networks were established for epoch GPS measurements and one countrywide GEONAS network for permanent GPS satellite signals monitoring. In the east part of the Bohemian Massif sinistral movements on the Sudetic NW-SE faults and as well on the NNE-SSW faults of the Moravo-Silesian tectonic system have been detected. The sinistral trends dominate on many faults situated close to the contact of the Moldanuabian and Lugian parts and the Moravo-Silesian part of the Bohemian Massif. Because of tectonic systems intersections an existence of dextral movements cannot be excluded. Additional analyses displayed that eastern part of the Massif could be under extending trends. The preliminary site velocities assessed from GPS data for the eastern part of the Bohemian Massif are discussed from a viewpoint of regional geological structure motions. The work was supported by the Grant Agency of the Academy of Sciences of the Czech Republic (Project IAA300460507), the Targeted Research Programme of the Academy of Sciences of the CR (1QS300460551) and by the Ministry of Education, Youth and Sport of the Czech Republic (Projects LC506 and 1P05ME781).

Schenk, V.; Schenková, Z.; Grácová, M.

2009-04-01

45

Geology and Tectonic Evolution of the Kazda? Massif (NW Anatolia)  

NASA Astrophysics Data System (ADS)

In the northwestern part of Anatolia along the Izmir-Ankara Suture Zone, the Kazda? and Uluda? metamorphic massifs form an E-W trending belt between the Sakarya Continent in the north and the Menderes Massif in the south. Internal succession of these two massifs have been described as metamorphic complexes consisting of various kinds of micaschists, quartz mica schist, gneisses, amphibolites and marbles. In the Kazda? metamorphics, metaophiolites have been described additionally (Okay et al., 1991; Yalt?rak and Okay, 1994; Okay et al., 1996; Duru et al., 2004). These metamorphic complexes were considered to form the basement of the Sakarya Continent tectonically overlain by the Early Permian (Topuz et al., 2004) to Late Triassic (Okay and Monie, 1997; Okay et al., 2002) Karakaya Complex. This old basement and the Karakaya Complex were suggested to be unconformably overlain by Liassic and younger platform limestones and detritals (Alt?ner et al., 1991). In the literature, it has also been suggested that the Kazda? Massif had experienced polyphase metamorphism, first during Carboniferous time, second during Early Triassic and third during Tertiary (Bingöl, 1971; Okay et al., 1996; Okay and Sat?r, 2000). In this study we mapped the Kazda? Massif on 1/25000 scale, studied its internal stratigraphy and structures and performed some petrologic analyses and radiogenic age determinations. Stratigraphically in the lower part of the Kazda? metamorphic sequence, there is a part of an oceanic crust represented by metaultramafic rocks and gabbroic metacumulates. Geochemistry of these banded metagabbros show a mid-oceanic affinity. This oceanic crust is overlain, along an unconformity, by a platform type marble succession. At the base of the marbles, there is a basal conglomerate, clasts of which derived from the underlying ultramafic sequence. Thick white marble sequence is overlain along a gradational boundary with a metadetrital succession consisting of quartz mica schist and mica schists that are partly converted into migmatites. There are mafic metavolcanic intervals along the lower gradational zone and within various levels of the metadetrital unit and some marble lenses. The platform sequence resembles to the Mesozoic platform of the Sakarya continent and the underlying oceanic crust might be a part of a Paleotethys Ocean. The Kazda? succession had been subjected to high-grade migmatitic metamorphism accompanied by syntectonic granite emplacements. Zircons of these metagranites yielded U-Pb ages of 27.6 ± 6.8 Ma and 207Pb/206 Pb evaporation ages of 30 Ma. The metadetrital sequences and migmatites show scattered 207Pb/206 Pb zircon evaporation ages ranging from 301.4 ± 2.8 Ma, 274.9 ± 3.1 Ma, 169.3 ± 3.5 Ma indicating mixed ages with strong Alpine imprints. After metamorphism the Kazda? metamorphic sequence was internally imbricated by southward compression and the ultramafic sequence thrust on the top of the platform sequence. During this southward thrusting two different nappes emplaced successively on top of the Kazda? metamorphics from the north. The first nappe consists of a part of Karakaya Complex and the second one, at the top, consists of the Çetmi Melange. Our mapping results clearly show that all these nappe packages including the internally imbricated Kazda? metamorphics are cut by undeformed young granites of 18-24 Ma age (Okay and Sat?r, 2000). Exhumation of the Kazda? metamorphics was a result of the southerly imbrication which occurred after the emplacement of the syntectonic metagranites (29-30 Ma) and before the intrusion of the cross cutting young granites (~ 21 Ma) The present topographic relief of the mountain was the result of younger vertical movements dissipated among numerous E-W trending high angle normal faults observed on its southern slope facing to Edremit Bay. References Altiner , D., Koçyi?it, A., Farinacci, A., Nicosia, U. and Conti, M.A. (1991) Jurassic-Lower Cretaceous stratigraphy and paleogeographic evolution of the southern part of the northwestern Anatolia. Geologica

Erdo?an, B.; Akay, E.; Hasözbek, A.; Sat?r, M.; Siebel, W.

2009-04-01

46

Pyroxenites - Melting or Migration?: Evidence from the Balmuccia massif  

NASA Astrophysics Data System (ADS)

The recognition of pyroxenites in the mantle, combined with their lower solidus temperatures than peridotite, have been proposed as contributors to melting (Pertermann and Hirschmann, 2003; Sobolev et al, 2005; 2007). Geochemical fingerprints of this process invoke an unspecified 'pyroxenite' as the putative source. In reality, mantle pyroxenites are diverse (Downes, 2007), requiring that their mode of origin and compositional variability be addressed. Due to the excellent preservation and exposure of the Balmuccia massif, it has become an archetype for orogenic peridotites, providing information on their composition, field relationships and metamorphic history (Shervais and Mukasa, 1991; Hartmann and Wedepohl, 1993; Rivalenti et al., 1995; Mazzucchelli et al., 2009). The Balmuccia massif consists of fertile lherzolite with subordinate harzburgite and dunite and is riddled with pyroxenite bands, which fall into two suites - Chrome-Diopside (Cr-Di) and Aluminous-Augite (Al-Aug), a pairing present in most massif peridotites. Two-pyroxene thermometry gives temperatures of 850±25°C at 1-1.5 GPa, 500°C lower than asthenospheric mantle at that pressure, meaning they do not preserve their original, high temperature mineralogy. Decimetre-sized Cr-Di bands (?75% CPX, 25% OPX) occur as initially Ol-free and bound by refractory dunite, but, as the bands are rotated into the plane of foliation, they mechanically incorporate olivine. Al-Aug veins (60% CPX, 25% OPX, 15% Sp) discordantly cut the body, intruding lherzolites which show enrichments in Fe, Al and Ti adjacent to the dykes. Both the Cr-Di suite and the Al-Aug series have indistinguishable Sr-, Nd-isotopic compositions to the host peridotite (Mukasa and Shervais, 1999). The major element compositions of pyroxenes in the Cr-Di bands and those in the surrounding peridotites are identical. Together with isotopic evidence, this suggests a local source, not only chemically but spatially, where a very low degree melt (?2%) acts as a transport medium for the pyroxenes and segregates them into dyke-like structures (melt/rock = 0.05-0.1), analogous to 'pressure-solution' creep (Dick and Sinton, 1979). The presence of a melt is required by their REE contents, with moderate La/SmN (0.3 - 0.4) with near-flat HREE (1 < Gd/YbN < 1.1), in contrast to the lherzolites, which preserve highly fractionated La/SmN (0.03 - 0.3) and positively-sloping HREE (0.6 < Gd/YbN < 0.8). Models for their formation as cumulates from a melt are untenable, as, upon decompression, olivine is invariably the first phase to crystallise, thereby drastically reducing Mg# and Cr# to values lower than those in the Cr-Di bands. The Al-Aug veins have lower Mg# (85-87) than the peridotites and Cr-Di series (?90). However, CPXs in both the Al-Aug and the lherzolite preserve REE patterns which are subparallel to, but twice as enriched as those in the normal lherzolites. This characteristic can be explained by focusing of a small, (4%) locally-sourced melt similar to that which transported the Cr-Di pyroxenes. This melt was focused to a melt/rock ratio of 0.6 - 0.7, and crystallised to form the cumulus rocks of the Al-Augite suite. The extreme, heavy ?57Fe values observed in both the pyroxenite and adjacent lherzolite (+ 0.75 per mille) also point to a low-degree melt.

Sossi, Paolo; O'Neill, Hugh

2014-05-01

47

Low pressure granulites from the Bohemian Massif, Upper Austria  

NASA Astrophysics Data System (ADS)

Low pressure granulite facies rocks are commonly found in the Bohemian Massif in Upper Austria. They belong to the Moldanubian Unit and were metamorphosed during the last stage of the Variscan orogeny. The investigated granulites from the Donau valley (west of Linz), Lichtenberg (northwest of Linz), Sauwald (south of the river Danube) and Bad Leonfelden zone comprise mainly migmatic paragneisses. Most of these rocks underwent high degrees of melting forming meta- and diatexites (''Perlgneise)''. Al-rich metapelites with partly cm-sized garnet porphyroblasts, which are suitable for precise PT and PT-path determinations, can be found in some localities of this unit. In this study samples taken along the Danube valley between Linz and Wilhering, from Lichtenberg and from Bad Leonfelden (north of Linz) were sampled and investigated petrographically in detail. Since garnets are rare and usually consumed by cordierite, a sample with large garnets was investigated in detail. A chemical zoning profile across the c. 1cm large garnet displayed elevated Ca contents (Xgrs=0.06) in the central part which decreased discontinuously towards the rim to Xgrs=0.02. Almandine, pyrope and spessartine components do not show any pronounced zoning pattern. Most of the smaller garnet grains in other samples are also homogeneous in composition with a slight Xalm increase and Xprp decrease at the rims, typical for retrograde diffusional zoning. The cordierite-garnet-sillimanite-granulites as well as some mafic granulites were used for geothermobarometry. Metamorphic conditions of around 770°C to 850°C and 0.5-0.6 GPa could be obtained, which are similar to the values obtained by Tropper et al. (2006). P. Tropper I. Deibl F. Finger R. Kaindl (2006). P-T-t evolution of spinel-cordierite-garnet gneisses from the Sauwald Zone (Southern Bohemian Massif, Upper Austria): is there evidence for two independent late-Variscan low-P / high-T events in the Moldanubian Unit? Int J Earth Sci (Geol Rundsch) (2006) 95: 1019-1037.

Sorger, Dominik; Daghighi, Donia; Simic, Katica; Pichler, Ruth; Schwaiger, Christian; Hauzenberger, Christoph; Linner, Manfred; Iglseder, Christoph

2014-05-01

48

Alpe Arami: a peridotite massif from the Mantle Transition Zone?  

NASA Astrophysics Data System (ADS)

Petrologic discoveries made over the last ten years have shown that in regions of continent-continent collision, rocks of the continental crust can be subducted to much greater depths than previously considered reasonable. Documentation of such extreme subduction has come from discovery of diamond, coesite and other high pressure phases; in many cases these phases, metastable at the Earth's surface, are only preserved as inclusions in strong, refractory minerals that either have a broad pressure range of stability or exhibit very sluggish kinetics of reaction to low pressure forms. The Alpe Arami peridotite of the Swiss Alps displays extensive exsolution of FeTiO 3 rods in the oldest generation of olivine. The shape, orientation and abundance of the titanate rods provide strong indication that the phase originally exsolved was the orthorhombic pervoskite phase stable only at pressures greater than 10 GPa (300 km depth) at mantle temperatures. We show here that the dislocation substructure of the oldest generation of olivine is younger than the titanate rods and similar to that observed in peridotites the world over and in experiments; the slip systems represented are incapable of producing the unique and unexplained lattice preferred orientation (LPO) displayed by this generation of olivine. We also have conducted preliminary experiments to investigate the maximum solubility of FeTiO 3 in olivine. Our results suggest that the solubility of TiO 2 implied by the abundance of titanate precipitates may be impossible under any conditions of olivine stability. On the other hand, the measured solubility in wadsleyite (?-olivine) under the conditions of our experiments is comparable to that inferred for Alpe Arami olivine. This latter observation combined with the determination that the titanate rods and LPO of this generation of olivine are the oldest features yet identified in these rocks, leads us to speculate that this massif has been brought to the Earth's surface from within the mantle transition zone, at depths of 410-660 km. The only mechanism by which we can envision this to have been accomplished is for the Lepontine gneisses that now surround the massif to have been subducted to great depth following collision of Africa and Europe, and to have picked up the peridotite on their way back to the surface by buoyant upwelling.

Green, Harry W.; Dobrzhinetskaya, Larissa; Riggs, Eric M.; Jin, Zhen-Ming

1997-09-01

49

The Northeast Climate Science Center  

NASA Astrophysics Data System (ADS)

The Department of Interior Northeast Climate Science Center (NE CSC) is part of a federal network of eight Climate Science Centers created to provide scientific information, tools, and techniques that managers and other parties interested in land, water, wildlife and cultural resources can use to anticipate, monitor, and adapt to climate change. Recognizing the critical threats, unique climate challenges, and expansive and diverse nature of the northeast region, the University of Massachusetts Amherst, College of Menominee Nation, Columbia University, Marine Biological Laboratory, University of Minnesota, University of Missouri Columbia, and University of Wisconsin-Madison have formed a consortium to host the NE CSC. This partnership with the U.S. Geological Survey climate science center network provides wide-reaching expertise, resources, and established professional collaborations in both climate science and natural and cultural resources management. This interdisciplinary approach is needed for successfully meeting the regional needs for climate impact assessment, adaptive management, education, and stakeholder outreach throughout the northeast region. Thus, the NE CSC conducts research, both through its general funds and its annual competitive award process, that responds to the needs of natural resource management partners that exist, in part or whole, within the NE CSC bounds. This domain includes the North Atlantic, Upper Midwest and Great Lakes, Eastern Tallgrass and Big Rivers, and Appalachian Landscape Conservation Cooperatives (LCCs), among other management stakeholders. For example, researchers are developing techniques to monitor tree range dynamics as affected by natural disturbances which can enable adaptation of projected climate impacts; conducting a Designing Sustainable Landscapes project to assess the capability of current and potential future landscapes in the Northeast to provide integral ecosystems and suitable habitat for a suite of representative species and provide guidance for strategic habitat conservation; studying the effects of changes in the frequency and magnitude of drought and stream temperature on brook trout habitats, spatial distribution and population persistence; and conducting assessments of northeastern regional climate projections and high-resolution downscaling.

Ratnaswamy, M. J.; Palmer, R. N.; Morelli, T.; Staudinger, M.; Holland, A. R.

2013-12-01

50

Historical Floods in the Northeast  

NSDL National Science Digital Library

This site reviews major flooding in the Northeastern United States, as reported by the Northeast River Forecast Center (NERFC), a division of the National Weather Service. It includes photos, rainfall maps, and descriptions of record-breaking floods that occured between the years 1927 and 1996. Descriptions include specific causes of flooding, weather patterns leading up to flooding, as well as results and actions taken due to flooding in the regions discussed.

51

Late Pleistocene Glaciation of the Kosciuszko Massif, Snowy Mountains, Australia  

NASA Astrophysics Data System (ADS)

Late Pleistocene glaciation of the Australian mainland was restricted to a small area of the southeastern highlands. Geomorphic mapping of the area and exposure dating using the in situ produced cosmogenic isotope 10Be provides evidence for at least two distinct glaciations. The Early Kosciuszko glaciation consisted of a single glacier advance before 59,300 ± 5400 years ago (Snowy River Advance). The Late Kosciuszko glaciation comprised three glacier advances 32,000 ± 2500 (Headley Tarn Advance), 19,100 ± 1600 (Blue Lake Advance), and 16,800 ± 1400 years ago (Mt. Twynam Advance). The Early Kosciuszko glaciation was the most extensive and the Late Kosciuszko advances were progressively less extensive. These periods of glaciation in the highlands correspond to episodes of periglacial activity and peaks in lake levels and river discharge at lower elevations in southeastern Australia. Glacier advances on the Kosciuszko Massif correlate with advances in Tasmania, South America, and New Zealand and are broadly representative of hemispheric climate changes during the last glacial cycle.

Barrows, Timothy T.; Stone, John O.; Fifield, L. Keith; Cresswell, Richard G.

2001-03-01

52

Horizontal strain field of the Bohemian Massif determined from GPS measurements  

NASA Astrophysics Data System (ADS)

Permanent GNSS and campaign GPS data monitored on several geodynamic networks located in the territory of the Bohemian Massif, Central Europe, allowed site movements to be determined. To constrain the first image of regional strain field for this territory a 2-D numerical modeling based on the theory of continuum mechanics under an assumption of homogeneity of the area was applied and site movements, i.e. displacement vectors, were taken as calculation inputs. This approach represents a purely geometric solution. Further attention was paid to influences of regional geological discontinuities of the Massif, by means of an evaluation of their mechanical decoupling along major faults and/or fault zones that play an important role in the distribution of the regional and local motions and stress patterns. The particular analysis of the behavior of tectonic zones in the Bohemian Massif was performed. Fundamental source of the mobility of these zones depends directly on sizes and directions of existing northward movements of structural blocks of the Alpine orogenic system. It was found that common horizontal strain field of the Bohemian Massif displays significant E-W extensions in the eastern and western parts of the Massif and mild N-S compressions in its central part. Additional analyses of the strain field pattern and its numerical uncertainties will be discussed from the viewpoint of data processing and knowledge of geological structures.

Schenkova, Z.; Talich, M.; Schenk, V.

2011-12-01

53

Sedimentary geology as a key to understanding the tectonic evolution of the Mesozoic–Early Tertiary Paikon Massif, Vardar suture zone, N Greece  

Microsoft Academic Search

This paper demonstrates how sedimentary evidence can provide a key to elucidating the regional tectonic and palaeoceanographic significance of a complex partly metamorphic terrane, in this case the Paikon Massif. The Paikon Massif is located centrally within the Vardar–Axios zone of N Greece and is critical to the reconstruction of Neotethys in the E Mediterranean region. The massif is here

Sally A. M. Brown; Alastair H. F. Robertson

2003-01-01

54

Volcanoes of the Tibesti massif (Chad, northern Africa)  

NASA Astrophysics Data System (ADS)

The Tibesti massif, one of the most prominent features of the Sahara desert, covers an area of some 100,000 km2. Though largely absent from scientific inquiry for several decades, it is one of the world’s major volcanic provinces, and a key example of continental hot spot volcanism. The intense activity of the TVP began as early as the Oligocene, though the major products that mark its surface date from Lower Miocene to Quaternary (Furon (Geology of Africa. Oliver & Boyd, Edinburgh (trans 1963, orig French 1960), pp 1-377, 1963)); Gourgaud and Vincent (J Volcanol Geotherm Res 129:261-290, 2004). We present here a new and consistent analysis of each of the main components of the Tibesti Volcanic Province (TVP), based on examination of multispectral imagery and digital elevation data acquired from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). Our synthesis of these individual surveys shows that the TVP is made up of several shield volcanoes (up to 80 km diameter) with large-scale calderas, extensive lava plateaux and flow fields, widespread tephra deposits, and a highly varied structural relief. We compare morphometric characteristics of the major TVP structures with other hot spot volcanoes (the Hawaiian Islands, the Galápagos Islands, the Canary and Cape Verdes archipelagos, Jebel Marra (western Sudan), and Martian volcanoes), and consider the implications of differing tectonic setting (continental versus oceanic), the thickness and velocity of the lithosphere, the relative sizes of main volcanic features (e.g. summit calderas, steep slopes at summit regions), and the extent and diversity of volcanic features. These comparisons reveal morphologic similarities between volcanism in the Tibesti, the Galápagos, and Western Sudan but also some distinct features of the TVP. Additionally, we find that a relatively haphazard spatial development of the TVP has occurred, with volcanism initially appearing in the Central TVP and subsequently migrating to both the Eastern and Western TVP regions.

Permenter, Jason L.; Oppenheimer, Clive

2007-04-01

55

76 FR 34139 - Northeast Corridor Safety Committee; Meeting Postponement  

Federal Register 2010, 2011, 2012, 2013

...FRA-2011-0027; Notice No. 2] Northeast Corridor Safety Committee; Meeting...announced the first meeting of the Northeast Corridor Safety Committee, a Federal...DATES: The meeting of the Northeast Corridor Safety Committee...

2011-06-10

56

77 FR 3326 - Northeast Corridor Safety Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...FRA-2011-0027; Notice No. 3] Northeast Corridor Safety Committee; Notice of...ACTION: Announcement of Northeast Corridor Safety Committee Meeting...announced the first meeting of the Northeast Corridor Safety Committee, a...

2012-01-23

57

76 FR 32391 - Northeast Corridor Safety Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...FRA-2011-0027; Notice No. 1] Northeast Corridor Safety Committee; Notice of...ACTION: Announcement of the Northeast Corridor Safety Committee Meeting...announces the first meeting of the Northeast Corridor Safety Committee, a...

2011-06-06

58

77 FR 20690 - Northeast Corridor Safety Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...FRA-2011-0027; Notice No. 4] Northeast Corridor Safety Committee; Notice of...ACTION: Announcement of the Northeast Corridor Safety Committee (NECSC...stakeholders operating on the Northeast Corridor (NEC), and the purpose...

2012-04-05

59

78 FR 23815 - Northeast Corridor Safety Committee; Notice of Meeting  

Federal Register 2010, 2011, 2012, 2013

...FRA-2011-0027; Notice No. 6] Northeast Corridor Safety Committee; Notice of...ACTION: Announcement of the Northeast Corridor Safety Committee (NECSC...announces the fourth meeting of the Northeast Corridor Safety Committee, a...

2013-04-22

60

Origin and tectonic significance of the Huangling massif within the Yangtze craton, South China  

NASA Astrophysics Data System (ADS)

As the oldest exposed basement and the typical sedimentary cover of the Yangtze craton, the Huangling massif is a suitable place to decipher the tectonics of South China block. Structural analysis shows that the Huangling massif has an elliptic domal shape with N–S striking long axis, an asymmetric antiform with a steep western flank and a gentle eastern flank. There, three litho-tectonic units are recognized, from inner to outer parts: (1) Archean–Paleoproterozoic metamorphic rocks intruded by Neoproterozoic granitoids; (2) Neoproterozoic to Jurassic sedimentary envelope around the dome core; (3) Cretaceous terrigeneous alluvial–fluvial deposits, unconformably overlying the dome flanks. Coeval with the uplifting of the massif, the pre-Cretaceous strata on the western and eastern flanks of the Huangling massif were involved in a series of folds with nearly N–S axes and layer-parallel slip structures with top-to-the-W and top-to-the-E motion, respectively. The subsequent brittle normal faulting controlled the deposition of the graben or half-graben basins on both flanks. Cooling history reveals that the Huangling massif underwent uplifting between 160 Ma and 110 Ma with an average cooling rate of 2–3 °C/Ma. Moreover, the Huangling area was not significantly affected by the Early Paleozoic and Triassic orogenies of South China. Comparable with the contemporaneous extensional structures, such as metamorphic core complexs, syntectonic plutons bounded by ductile normal faults, and rift-related basins in eastern China, it is proposed that the Huangling massif, might be an extensional structure controlled by a weak crustal extension. In this case, it will represent the western front of the Late Mesozoic lithospheric thinning in entire eastern China. However the compressional model cannot be ruled out.

Ji, Wenbin; Lin, Wei; Faure, Michel; Chu, Yang; Wu, Lin; Wang, Fei; Wang, Jun; Wang, Qingchen

2014-06-01

61

Results of deep-Seismic reflection investigations in the Rhenish Massif  

NASA Astrophysics Data System (ADS)

Within the "Deutsches Kontinentales ReflexionsSeismisches Programm" (= DEKORP) two deep-Seismic reflection lines in the Rhenish Massif were surveyed in 1986 and 1987. The Rhenish Massif is part of the Mid-European Variscides, an orogenic belt which developed in the Upper Devonian-Carboniferous. Devonian rocks crop out at surface with only few exceptions. The Rhenish Massif is bordered by two sedimentary troughs: the Subvariscan Foredeep in the north and the Hessian depression in the south. In east-west direction it is subdivided by the River Rhine and another depression, the so-called Eifel North-South-Zone. Both lines consist of two parts, respectively and cross the northern border of the Rhenish Massif. DEKORP 1A/B is located west of the River Rhine and was extended through the BELCORP group by 35 km in Belgium. The total length of the line is 145 km. DEKORP 2-North/2-North-Q is located east of the River Rhine and has a length of 220 km/60 km. The aim of these surveys was to investigate the crustal structure of the Rhenish Massif and its relation to the adjacent areas in the north and south. The results indicate the presence of NW-vergent tectonics the effects of which can be traced down to the deep parts of the crust. Horizontal compression must play a dominant role. Differences between the western and eastern parts of the Rhenish Massif, the "Faille du Midi" and a prominent fault at its northern border are evident.

Dekorp Research Group

1990-02-01

62

3. Perspective view of Express Building looking northeast, with Division ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. Perspective view of Express Building looking northeast, with Division Street in foreground - American Railway Express Company Freight Building, 1060 Northeast Division Street, Bend, Deschutes County, OR

63

11. Exterior detail view of northeast corner, showing stucco finish ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. Exterior detail view of northeast corner, showing stucco finish and woodwork details - American Railway Express Company Freight Building, 1060 Northeast Division Street, Bend, Deschutes County, OR

64

Biodiversity impact of the aeolian periglacial geomorphologic evolution of the Fontainebleau Massif (France)  

NASA Astrophysics Data System (ADS)

Landscape features The geomorphology of the Fontainebleau Massif is noteworthy for its spectacular narrow ridges, up to 10 km long and 0.5 km wide, armored by tightly cemented sandstone lenses and which overhang sandy depressions of about 50m. Denudation of the sandstone pans lead to a highly contrasted landscape, with sandstone ridges ("platières") towering sandy depressions ("vallées") and limestone plateaus ("monts"). This forms the geological frame of the spectacular sceneries of the Fontainebleau Massif (Thiry & Liron, 2007). Nevertheless, there is little know about the erosive processes that have built-up these landscapes. Periglacial processes, and among them aeolian ones, appear significant in the development of the Fontainebleau Massif physiography. The periglacial aeolian geomorphology Dunes and dune fields are known since long and cover about 15% to 25% of the Fontainebleau Massif. The aeolian dunes developed as well on the higher parts of the landscape, as well as in the lower parts of the landscape. The dunes are especially well developed in the whole eastern part of the massif, whereas the western part of the massif is almost devoid of dunes. Nevertheless, detailed mapping shows that dunes can locally be found in the western district, they are of limited extension, restricted to the east facing backslope of outliers. Loamy-sand covers the limestone plateaus of the "monts". The loam cover is of variable thickness: schematically thicker in the central part of the plateaus, where it my reach 3 m; elsewhere it may thin down to 0,20-0,30 m, especially at the plateau edges. Blowout hollows are "negative" morphologies from where the sand has been withdrawed. Often these blowouts are decametric sized and well-delimited structures. Others, more complex structures, are made up of several elongated hectometric hollows relaying each other from and which outline deflation corridor more than 1 km long. A characteristic feature of these blowout hollows is the erosion of the sand beneath the bordering sandstone benches, resulting in overhangs. These structures are the most common in the western district of the Fontainebleau Massif. Ponds develop on the tightly silicified and impermeable sandstone pans that form the "platières". There are permanent ponds and temporary wet zones, formed of interconnected or isolated depressions. The origin of these ponds has to be questioned with regard to the landscape shaping. Their origin is directly bound to the hollowing of uncemented, sandy zones, within the sandstone pans forming the "platières". Erosion by runoff cannot be considered; the only way to hollow them out is by deflation processes. No direct dating of the Quaternary dune and loess deposits of the Fontainebleau Massif exists. Nevertheless, dating of paleopodzols interlayered between drift sands, pond deposits and bones within congelifracts allow relating these periglacial features with the end of the last glacial period. For now, there is no dating to assess what belongs to older glacial periods. Distribution of the aeolian patterns The Fontainebleau Massif displays noteworthy morphological diversities in the various districts of the forest. Some of these differentiations result from geological features, but most of them are related to erosion processes, and among them deflation processes leaved different imprints in the western and eastern districts of the Fontainebleau Massif. The topography played an important role controlling the aeolian processes. Deflation was important in the westerly upwind district. In the westerly front face, aeolian erosion was activated by turbulences around the topographic obstacles. The reliefs funneled the winds and gave rise to swirls that hollow the blowouts. This area displays the sharpest and more chiseled landforms of the massif. Moreover, the sandstone scarps at the edge of the "platières" are high and uncovered, with frequent overhangs. The collapsed sandstone blocks of the "chaos" are im

Thiry, M.; Liron, M. N.

2009-04-01

65

The Dongbo and Purang ultramafic massifs in the Yarlung Zangbo suture zone of Tibet: Prospects for large chromite deposits  

NASA Astrophysics Data System (ADS)

Many ultramafic massifs occur along the Neo-Tethyan Yarlung Zangbo suture zone between the Indian and Eurasian plates, and the Dongbo and Purang ultramafic massifs in the western part of the zone are two of the largest. Both of them consist mainly of high-Mg harzburgite (with low pyroxene contents) and dunite with minor lherzolite. Mineral compositions of olivine, orthopyroxene, clinopyroxene, and chromite, as well as whole-rock petrochemistry indicate that these are typical Alpine-type mantle peridotites. Chromium spinels in the lherzolite have Cr#s (=100 x Cr/(Cr+Al)) of 20-30, showing an affinity with abyssal peridotites, whereas those in the harzburgites have Cr#s ranging from 20 to 75, implying later melt-rock reaction. Based on the mineralogy and geochemistry of the rocks, the Dongbo and Purang massifs are interpreted as fragments of MORB lithosphere that were modified in a later SSZ setting. Many massive chromite ores and zones of disseminated mineralization are present in the two massifs, and chromite ores have Cr#s 70-80, similar to those of the hosting dunite. The petrological features and metallogenic environment of the Dongbo and Purang massifs are very similar to those of the Luobusa peridotite massif, which hosts the largest chromite deposit in China. Thus, we propose that the Purang and Dongbo massifs are two potential locations for significant chromite deposits.

Xiong, F.; Yang, J.; Li, Y.; Liu, Z.; Liu, F.; Xu, X.

2012-12-01

66

Contribution to the Study of Geochronological Evolution of Troia Massif-CE, in Brazil.  

National Technical Information Service (NTIS)

The geochronological study of the Massif of Troia-CE, Brazil, for identifying different parastratigraphic units is presented. A previous selection by macroscopic, microscopic and X-ray fluorescence analysis for Rb/Sr determinations in whole rock, and K/Ar...

R. R. Pessoa D. R. Pessoa B. B. Brito Neves K. Kawashita R. A. Fuck

1986-01-01

67

Jurassic hot spring deposits of the Deseado Massif (Patagonia, Argentina): Characteristics and controls on regional distribution  

Microsoft Academic Search

The Deseado Massif, Santa Cruz Province, Argentinean Patagonia, hosts numerous Middle to Late Jurassic age geothermal and epithermal features represented by siliceous and calcareous chemical precipitates from hot springs (sinters and travertines, respectively), hydrothermal breccias, quartz veins, and widespread hydrothermal silicification. They indicate pauses in explosive volcanic activity, marking the final stages in the evolution of an extensive Jurassic (ca.

Diego M. Guido; Kathleen A. Campbell

2011-01-01

68

Density profile and modern crustal and uppermost mantle geotherm of the Voronezh crystalline massif  

Microsoft Academic Search

A density profile and a modern temperature distribution in the lithosphere of the Voronezh crystalline massif (VCM) are derived through the use of the VP(z), VS(z) seismic velocity models, petrological data, measurements of VP, VS, density (rho) and mean atomic weight (m) for several groups of rocks and minerals of different composition and genesis, as well as from pressure and

A. P. Tarkov

1983-01-01

69

Evidence of fluid inclusions in metamorphic microdiamonds from the Kokchetav massif, northern Kazakhstan  

Microsoft Academic Search

Microdiamonds from garnet clinopyroxenites of the Kokchetav massif (northern Kazakhstan) and associated alluvial diamonds have been investigated using infrared spectroscopy. All diamonds have high nitrogen contents (from 747 up to 4488 ± 20% at. ppm) and are of type Ib-IaA. Nitrogen data are consistent with a diamond formation over a narrow temperature range. Microdiamonds from garnet clinopyroxenites are characterized by

K De Corte; P. Cartigny; V. S Shatsky; N. V. Sobolev; M. Javoy

1998-01-01

70

Multiple zircon growth during fast exhumation of diamondiferous, deeply subducted continental crust (Kokchetav Massif, Kazakhstan)  

Microsoft Academic Search

Diamondiferous rocks from the Kokchetav Massif, Kazakhstan, represent deeply subducted continental crust. In order to constrain the age of ultra high pressure (UHP) metamorphism and subsequent retrogression during exhumation, zircons from diamondiferous gneisses and metacarbonates have been investigated by a combined petrological and isotopic study. Four different zircon domains were distinguished on the basis of transmitted light microscopy, cathodoluminescence, trace

Jörg Hermann; Daniela Rubatto; Andrei Korsakov; Vladislav S. Shatsky

2001-01-01

71

Tectonic Significance of Magnetic Fabrics in the Serpentinized Lherzolite of the Ronda Massif, Spain  

NASA Astrophysics Data System (ADS)

The Ronda Massif, Spain is the largest exposure of sub-continental mantle. Exhumation of this 300 km2 massif is controversial. Collision between two lithospheres during the Alpine orogeny formed the Betic Arc, characterized by continental subduction and post-collisional exhumation along a large-scale shear zone. This massif is characterized by three continental lherzolite facies: garnet, spinel and plagioclase. Garnet attests of subduction at depths greater than 120 km while plagioclase could result from decompression melting. Serpentinization is pervasive but its origin and timing remain unclear. Recent studies in forearc settings suggest that the subcontinental mantle might be serpentinized before exhumation. Alternatively serpentinization might result from fluids released during dehydration metamorphism coeval with subduction or exhumation. The formation of magnetite grains as part of serpentinization reactions offers the opportunity to address the question of timing of this serpentinization with respect to the subduction - exhumation history. Previous studies on serpentinized peridotites elsewhere have shown that the low-field anisotropy of magnetic susceptibility (AMS) is controlled primarily by magnetite shape preferred orientation and that magnetite grains tend to grow along the silicate ductile fabric and at a later stage along brittle fractures. This study investigates the low-field AMS of 11 oriented specimens from the Ronda Massif collected across a strain gradient in mylonites and spinel tectonites associated with the large scale shear zone.

Skord, J. A.; Belley, F.; Ferre, E. C.; Martin-Hernandez, F.; Garrido, C. J.

2008-12-01

72

Geomechanical Properties of Shear Zones in the Eastern Aar Massif, Switzerland and their Implication on Tunnelling  

Microsoft Academic Search

Summary ¶Rock zones containing a high fracture density and\\/or soft, low cohesion materials can be highly problematic when encountered during tunnel excavation. For example in the eastern Aar massif of central Switzerland, experiences during the construction of the Gotthard highway tunnel showed that heavily fractured areas within shear zones were responsible for overbreaks in the form of chimneys several metres

S. Laws; E. Eberhardt; S. Loew; F. Descoeudres

2003-01-01

73

Teaching Quality after the Massification of Higher Education in Taiwan: A Student Perspective  

ERIC Educational Resources Information Center

To explore whether teaching quality was improved by the Taiwan Ministry of Education's implementation of the Teaching Excellence Program after the massification of higher education, the authors used data from a 2007 student survey to build a Teaching Quality Assessment Model to analyze university students' views of the Teaching Excellence…

Dian-Fu, Chang; Yeh, Chao-Chi

2012-01-01

74

Structural style of cretaceous compression in the northern Bohemian massif of eastern Germany  

Microsoft Academic Search

The Bohemian massif was subjected to regional compressional stresses during Late Cretaceous Alpine, Dinaric, and Carpathian tectonic events. Older Mesozoic extensional and Variscan compressional fault planes were reactivated as decollement surfaces during this Late Cretaceous compression. Seismic profiles and geologic data suggest that Cretaceous faults are rooted in low-angle detachments and predominately compressional. In addition, an sinistral shear component is

L. Rigo; M. Welker-Haddock

1993-01-01

75

New Insights On The Seismotectonics of The French Central Massif and Western France  

NASA Astrophysics Data System (ADS)

Nowadays, the increase of the number of seismological stations distributed through- out France, allows a re-evaluation of the regional sismotectonics, in particular by pre- cise localisation and computation of focal mecanisms even for small magnitude earth- quakes (Nicolas et al., 1998, Bethoux et al. 1998, Sue et al., 1999; Baroux et al., 2000; Rigo et al., 1999, Souriau et al.,1998). Thanks to the LDG code "FUSION", we have mixed the bulletin data available from several networks, for the French Central massif and Western France, from January 1962 to October 2001. Then, we have divided our study area in different zones: the western Central Massif, a volcanic province (Chaine des Puys), an eocene graben (Limagne), a sedimentary basin (Bassin de Paris), and also the Charente region and the Armorican massif. Using the VELEST code (Kissling et al., 1994), we have obtain for each of those areas, a minimum 1D model (Kissling et al., 1994) which allows to improve the location of the hypocenters. These new hypocenter distributions are correlated with geological structures, and it is possible to associate swarns of events to faults recognized on the field. Some new focal mecha- nisms are computed. Then, an inversion of focal solutions available for each zone al- lows to deduce the regional stress field. Those informations will allow a re-evaluation of the seismotectonics of the northern Central Massif and Western France. In particu- lar, we propose a qualitative analysis of the major faults activity.

Mazabraud, Y.; Bethoux, N.; Guilbert, J.

76

Reforming Higher Education in Hong Kong towards Post-Massification: The First Decade and Challenges Ahead  

ERIC Educational Resources Information Center

The process of reforming Hong Kong's higher education sector commenced in 2001, and the system moved into the post-massification era. Within five years, the post-secondary participation rate for the 17-20 age cohort had increased to 66 per cent. This target was achieved much earlier than the Government had planned. More educational opportunities…

Wan, Calvin

2011-01-01

77

Northeast Regional Planetary Data Center  

NASA Technical Reports Server (NTRS)

In 1980, the Northeast Planetary Data Center (NEPDC) was established with Tim Mutch as its Director. The Center was originally located in the Sciences Library due to space limitations but moved to the Lincoln Field Building in 1983 where it could serve the Planetary Group and outside visitors more effectively. In 1984 Dr. Peter Schultz moved to Brown University and became its Director after serving in a similar capacity at the Lunar and Planetary Institute since 1976. Debbie Glavin has served as the Data Center Coordinator since 1982. Initially the NEPDC was build around Tim Mutch's research collection of Lunar Orbiter and Mariner 9 images with only partial sets of Apollo and Viking materials. Its collection was broadened and deepened as the Director (PHS) searched for materials to fill in gaps. Two important acquisitions included the transfer of a Viking collection from a previous PI in Tucson and the donation of surplused lunar materials (Apollo) from the USGS/Menlo Park prior to its building being torn down. Later additions included the pipeline of distributed materials such as the Viking photomosaic series and certain Magellan products. Not all materials sent to Brown, however, found their way to the Data Center, e.g., Voyager prints and negatives. In addition to the NEPDC, the planetary research collection is separately maintained in conjunction with past and ongoing mission activities. These materials (e.g., Viking, Magellan, Galileo, MGS mission products) are housed elsewhere and maintained independently from the NEPDC. They are unavailable to other researchers, educators, and general public. Consequently, the NEPDC represents the only generally accessible reference collection for use by researchers, students, faculty, educators, and general public in the Northeast corridor.

Schultz, Peter H.; Saunders, Stephen (Technical Monitor)

2005-01-01

78

Seismicity of the Atlantis Massif detachment fault, 30°N at the Mid-Atlantic Ridge  

NASA Astrophysics Data System (ADS)

At the oceanic core complex that forms the Atlantis Massif at 30°N on the Mid-Atlantic Ridge, slip along the detachment fault for the last 1.5-2 Ma has brought lower crust and mantle rocks to the seafloor. Hydroacoustic data collected between 1999 and 2003 suggest that seismicity occurred near the top of the Massif, mostly on the southeastern section, while detected seismicity along the adjacent ridge axis was sparse. In 2005, five short-period ocean bottom seismographs (OBS) were deployed on and around the Massif as a pilot experiment to help constrain the distribution of seismicity in this region. Analysis of six months of OBS data indicates that, in contrast to the results of the earlier hydroacoustic study, the vast majority of the seismicity is located within the axial valley. During the OBS deployment, and within the array, seismicity was primarily composed of a relatively constant background rate and two large aftershock sequences that included 5 teleseismic events with magnitudes between 4.0 and 4.5. The aftershock sequences were located on the western side of the axial valley adjacent to the Atlantis Massif and close to the ridge-transform intersection. They follow Omori's law, and constitute more than half of the detected earthquakes. The OBS data also indicate a low but persistent level of seismicity associated with active faulting within the Atlantis Massif in the same region as the hydroacoustically detected seismicity. Within the Massif, the data indicate a north-south striking normal fault, and a left-lateral, strike-slip fault near a prominent, transform-parallel, north-facing scarp. Both features could be explained by changes in the stress field at the inside corner associated with weak coupling on the Atlantis transform. Alternatively, the normal faulting within the Massif might indicate deformation of the detachment surface as it rolls over to near horizontal from an initial dip of about 60° beneath the axis, and the strike-slip events may indicate transform-parallel movement on adjacent detachment surfaces.

Collins, John A.; Smith, Deborah K.; McGuire, Jeffrey J.

2012-10-01

79

Crustal structure of the Bohemian Massif in the light of seismic refraction data  

NASA Astrophysics Data System (ADS)

The Bohemian Massif is one of the largest stable outcrops of pre-Permian rocks in Central and Western Europe. It forms the easternmost part of the Variscan Belt, which developed approximately between 500 and 250 Ma during a stage of large-scale crustal convergence, collision of continental plates and microplates, and possibly also subduction. It consists mainly of low- to high-grade metamorphic and plutonic Palaeozoic rocks. The area of the Bohemian Massif can be subdivided into various tectonostratigraphic units separated by faults, shear zones or thrusts trending roughly in a SW-NE direction, and reflecting varying influence of the Cadomian and Variscan orogenies: the Saxothuringian, Teplá-Barrandian, Moldanubian and Moravo-Silesian. Geographically, it comprises the area of the Czech Republic, partly Austria, Germany and Poland. While the post-collisional history of the Variscan Bohemian Massif is relatively clear, the kinematics of plate movements before and during collision is still subject of debates. To investigate such a complex structure, the Bohemian Massif has been covered by a network of seismic experiments as a result of a massive international cooperative effort in central Europe. Detailed analyses of the data from the main profiles of the CELEBRATION 2000, ALP 2002, and SUDETES 2003 refraction and wide-angle reflection seismic experiments show crustal and uppermost mantle structure of the massif and delimit the continuation of various tectonic units in depth. The differences in seismic velocities reflect, to some extent, the structural variances and give some indications for tracing of crust-forming processes during individual tectonic events. Lower crust in the Saxothuringian exhibits complicated structure, ranging from a highly reflective lower crustal layer above Moho with a strong velocity contrast at the top of this layer. Another possible explanation can be a double Moho or the Moho with some lateral topography. This complicated lower crust extends in a depth range of 26-35 km and is characteristic for the Saxothuringian unit, which was subject to the eastward subduction. The Moldanubian in the central part usually seen as the root of the Bohemian Massif is characterized by the deepest (39 km) and the most pronounced Moho within the whole massif with a strong velocity contrast. The lower crust at the eastern margin of the Bohemian Massif is characterized by elevated velocities and high velocity gradient, which seems to be a characteristic feature of the Moravo-Silesian. References Hrubcová, P., and W. H. Geissler. The Crust-Mantle Transition and the Moho beneath the Vogtland/West Bohemian Region in the Light of Different Seismic Methods, Stud. Geophys. Geod., 53, 275--294, 2009 Hrubcová P., P. ?roda, and CELEBRATION 2000 Working Group, Crustal structure at the easternmost termination of the Variscan belt based on CELEBRATION 2000 and ALP 2002 data, Tectonophysics, 460, 55-75, doi:10.1016/j.tecto.2008.07.009, 2008 Hrubcová P., P. ?roda, A. Špi?ák, A. Guterch, M. Grad, R. Keller, E. Brückl and H. Thybo, Crustal and uppermost mantle structure of the Bohemian Massif based on data from CELEBRATION 2000 Experiment, J. Geophys. Res., 110, B11305, doi:10.1029/2004JB003080, 2005 Hrubcová, P., P. ?roda, M. Grad, W.H. Geissler, A. Guterch, J. Vozár, E. Heged?s, and Sudetes 2003 Working Group. From the Variscan to the Alpine Orogeny - crustal structure of the Bohemian Massif and Western Carpathians in the light of the SUDETES 2003 seismic data, GJI, submitted

Hrubcova, Pavla

2010-05-01

80

Geological setting and petrogenesis of symmetrically zoned, miarolitic granitic pegmatites at Stak Nala, Nanga Parbat - Haramosh Massif, northern Pakistan  

USGS Publications Warehouse

Miarolitic granitic pegmatites in the Stak valley in the northeast part of the Nanga Parbat - Haramosh Massif, in northern Pakistan, locally contain economic quantities of bi- and tricolored tourmaline. The pegmatites form flat-lying sills that range from less than 1 m to more than 3 m thick and show symmetrical internal zonation. A narrow outer or border zone of medium-to coarse-grained oligoclase - K-feldspar - quartz grades inward to a very coarse-grained wall zone characterized by K-feldspar - oligoclase - quartz - schorl tourmaline. Radiating sprays of schorl and flaring megacrysts of K-feldspar (intermediate microcline) point inward, indicating progressive crystallization toward the core. The core zone consists of variable mixtures of blocky K-feldspar (intermediate microcline), oligoclase, quartz, and sparse schorl or elbaite, with local bodies of sodic aplite and miarolitic cavities or "pockets". Minor spessartine-almandine garnet and lo??llingite are disseminated throughout the pegmatite, but were not observed in the pockets. The pockets contain well-formed crystals of albite, quartz, K-feldspar (maximum microcline ?? orthoclase overgrowths), schorl-elbaite tourmaline, muscovite or lepidolite, topaz, and small amounts of other minerals. Elbaite is color-zoned from core to rim: green (Fe2+- and Mn2+-bearing), colorless (Mn2+-bearing), and light pink (trace Mn3+). Within ???10 cm of the pegmatites, the granitic gneiss wallrock is bleached owing to conversion of biotite to muscovite, with local quartz and albite added. Schorl is disseminated through the altered gneiss, and veins of schorl with bleached selvages locally traverse the wallrock up to 1 m from the pegmatite contact. The schorl veins can be traced into the outer part of the wall zone, which suggests that they formed from aqueous fluids derived during early saturation of the pegmatite-forming leucogranitic magma rich in H2O, F, B, and Li. Progressive crystallization resulted in a late-stage sodic magma and abundant aqueous fluids. Two late stages of volatile escape are recognized: the first stage caused pressure-quenching of the last magma, which produced aplite and caused albitization (An3 to An8) of earlier crystallized K-feldspar and oligoclase. The second stage, released during the rupture of miarolitic cavities, produced platy albite ("cleavelandite," An1) locally associated with F-rich moscovite and elbaite. Albitization is likely due to cooling of alkali-fluoride-dominated fluids at less than 2 kbar pressure. The pegmatites are derived from Himalayan leucogranitic magma emplaced prior to 5 Ma into granulitic gneiss that was at 300?? to 550??C and 1.5 to 2 kbar. The pegmatites were emplaced during uplift of the Haramosh Massif, since they cross-cut ductile normal faults but are cut by brittle normal faults. Economically important pink tourmaline mineralization formed in pockets concentrated near the crest of a broad antiform, as a result of trapping of late magmatic aqueous fluids that had become Fe-poor owing to the prior crystallization of schorl.

Laurs, B. M.; Dilles, J. H.; Wairrach, Y.; Kausar, A. B.; Snee, L. W.

1998-01-01

81

Paleomagnetic results from Cenozoic volcanics of Lusatia, NW Bohemian Massif  

NASA Astrophysics Data System (ADS)

Lusatia is situated in the NE continuation of the Ohre Rift (OR) behind Lusatian Overtrust. Compared to the neighbouring volcanic complex of the ?eské stredohorí Mts. (CS) inside the OR. The scattered occurrences of basaltic bodies in Lusatia are spread on wider area. This can be caused by different tectonic development of the regions and from derived erosional conditions. The Lusatian Overtrust, high-order tectonic structure running across the course of the OR, separates Lusatian region into two different geological areas where Cretaceous sediments or granodiorites of Lusatian Massif represent the country rock of the Cenozoic volcanism, respectively. The age of volcanic activity ranges from 19 to 33 Ma, it's proved by newly obtained Ar-Ar data from Freiberg and K-Ar data from Debrecen. Forty two scattered remnants of Cenozoic volcanic products were sampled to get paleomagnetic data. The superficial volcanics with detectable geological position and volcanology were chosen preferentially, several dykes and separate vents were sampled as well. Paleomagnetic research was processed on more than 500 samples which were demagnetized using alternate field in the range 0-80 mT. Q-ratio was counted to prevent the lightning influence - solitary volcanic occurrences build positive morphology and thus, they are prone to be targeted by lightnings. The values of Q-ratio predominantly span from 0.1 to 7.0; those samples having the value over 10, were excluded for evaluation. The mean paleomagnetic direction (MPD) was acquired from several samples on each sampling site. Declination and Inclination show values of 11.8 deg and 62.7 deg (?95 = 9.3 deg) for normal polarity, or 182.1 deg and -59.2 deg (?95 = 6.1 deg) for reverse polarity, respectively,The corresponding paleolatitude of 41.9 deg was counted from the Inclination. This is 1000 km to the South, compared to recent position. The dispersions of the MPD are relatively wide. This coincides well with the idea of long-lasting volcanic activity in Lusatia and supports the radiometric results. Duration of volcanic activity in Lusatia is similar to CS volcanic complex in OR and differs from these which are outside this structure. In combination of reversal test and the wide dispersion of MPD, the centred secular variation was proved. It allowed counting of the virtual geomagnetic pole (VGP) position on coordinates 79.9 N and 167.5 E (dp = 6.1 deg, dm = 7.9 deg), which corresponds with the Late Tertiary apparent polar wander path for Europe. The VGP counted from volcanics in Lusatia is relatively close to the data obtained mainly from the CS Volcanic Complex (85.09 N and 160.88 E). The paleomagnetic results of volcanic rocks from Lusatia, obtained up to now, show great similarity to that ones from the CS Volcanic Complex. This is another argument for an idea of joint volcanic development of these regions. It also contributes to the entitled use of the CS lithostratigraphic units in Lusatia.

Schnabl, P.; Cajz, V.; Tietz, O.; Buechner, J.; Suhr, P.; Pecskay, Z.; Cizkova, K.

2013-05-01

82

Delaware's Transportation Agenda in the Northeast Corridor.  

National Technical Information Service (NTIS)

The fractionated governance structure of the entire Northeast Corridor (Warren 2009) is also evidenced within the Baltimore-to-Philadelphia portion, which contains the entire extent of Delawares claim to the corridor. Though comprising only a small segmen...

G. Edwards

2009-01-01

83

Northeast Corridor Passenger Transportation Data Study.  

National Technical Information Service (NTIS)

Fourteen measures of performance are recommended for use in Northeast Corridor rail system evaluation and multimodal comparisons. These include performance measures in the categories of system configuration (e.g., daily available-seat miles by vehicle and...

1976-01-01

84

Enhancing Scientific Literacy in the Northeast Kingdom  

NASA Astrophysics Data System (ADS)

An observatory in the Northeast Kingdom of Vermont opens to assist surrounding elementary and high schools with science literacy using astronomy as a capstone science, introducing students to advanced instrumentation, scientific method and data manipulation skills.

Blackwell, John; Moss, B.; Wanzer, S.

2014-01-01

85

India's Northeast: The Frontier in Ferment.  

National Technical Information Service (NTIS)

Prakash Singh's monograph on the threat that insurgencies in northeast India present to the national government provides an excellent insight into a significant security challenge to the Indian state. The troubles in the eight northeastern states highligh...

P. Singh

2008-01-01

86

Pliocene northeast African vegetation change  

NASA Astrophysics Data System (ADS)

Plant leaf wax molecular fossils have yielded key insights into forest-grassland transitions in northeast Africa. The stable carbon isotopic composition (?13C) of sedimentary leaf waxes (including n-alkanoic acids) records variations in the proportions of plants using the C3 (Calvin-Benson) pathway including trees, most shrubs and cool-season grasses versus the C4 (Hatch-Slack) pathway including warm-season grasses and sedges. Here we apply this technique to marine sediments from the Gulf of Aden to characterize northeast African environmental variability during the Pliocene. We sample DSDP Site 231 integrating 3kyr intervals to generate a high-resolution reconstruction spanning 3.7-5.3Ma. The ?13C compositions of downcore C30 n-alkanoic acid analyses average -27.5‰ (?=1.2, n=177), ranging between -30.2 to -24.3‰ with repeated oscillations in the proportions of C4 biomass, presumably corresponding to the eccentricity and precessional modulation of insolation acting on monsoonal precipitation. Although ?13C values cannot be uniquely translated to C4 biomass given the spread in the C3 'endmember', we find complimentary evidence for proportions of C4 biomass from the isotopic spread of the n-alkanoic homologues (n-C28 to n-C32). Comparison to pollen data indicates that at times of low ?13C values, complete forest cover remains unlikely given the presence of grass pollen - taken together these records indicate the presence of C3 grasses. By evaluating our longer record from this site, as well as the terrestrial soil carbonate record, we find the Pliocene has low C4 proportions in comparison to higher proportions in Pleistocene and even late Miocene times. Intriguingly this drop in C4 plant biomass may correspond to a period of elevated atmospheric pCO2. Our ongoing reconstructions are of interest both for constraining environments of hominin evolution and tropical climate variability prior to the onset of Northern Hemisphere Glaciation, in particular during this Pliocene time period of interest as a 'modest greenhouse' world.

Liddy, H.; Sieracki, A.; Feakins, S. J.

2012-12-01

87

NORTHEAST BRAZIL UNDER THE LULA GOVERNMENT  

Microsoft Academic Search

In this paper we seek to evaluate the President’s Lula first term policies toward Northeast. Two main hypothesis are developed. The first one is that, under Lula’s administration, Northeast benefited from a crucial change in the logic of the development model adopted in Brazil. Lula’s administration persisted on the emphasis on growth promotion fostering efficiency and competitiveness, which was started

Alexandre Rands Barros; André Matos Magalhães

2007-01-01

88

Antimalarial plants of northeast India: An overview  

PubMed Central

The need for an alternative drug for malaria initiated intensive efforts for developing new antimalarials from indigenous plants. The information from different tribal communities of northeast India along with research papers, including books, journals and documents of different universities and institutes of northeast India was collected for information on botanical therapies and plant species used for malaria. Sixty-eight plant species belonging to 33 families are used by the people of northeast India for the treatment of malaria. Six plant species, namely, Alstonia scholaris, Coptis teeta, Crotolaria occulta, Ocimum sanctum, Polygala persicariaefolia, Vitex peduncularis, have been reported by more than one worker from different parts of northeast India. The species reported to be used for the treatment of malaria were either found around the vicinity of their habitation or in the forest area of northeast India. The most frequently used plant parts were leaves (33%), roots (31%), and bark and whole plant (12%). The present study has compiled and enlisted the antimalarial plants of northeast India, which would help future workers to find out the suitable antimalarial plants by thorough study.

Shankar, Rama; Deb, Sourabh; Sharma, B K

2012-01-01

89

Antimalarial plants of northeast India: An overview.  

PubMed

The need for an alternative drug for malaria initiated intensive efforts for developing new antimalarials from indigenous plants. The information from different tribal communities of northeast India along with research papers, including books, journals and documents of different universities and institutes of northeast India was collected for information on botanical therapies and plant species used for malaria. Sixty-eight plant species belonging to 33 families are used by the people of northeast India for the treatment of malaria. Six plant species, namely, Alstonia scholaris, Coptis teeta, Crotolaria occulta, Ocimum sanctum, Polygala persicariaefolia, Vitex peduncularis, have been reported by more than one worker from different parts of northeast India. The species reported to be used for the treatment of malaria were either found around the vicinity of their habitation or in the forest area of northeast India. The most frequently used plant parts were leaves (33%), roots (31%), and bark and whole plant (12%). The present study has compiled and enlisted the antimalarial plants of northeast India, which would help future workers to find out the suitable antimalarial plants by thorough study. PMID:22529674

Shankar, Rama; Deb, Sourabh; Sharma, B K

2012-01-01

90

Northeast View From Pathfinder Lander  

NASA Technical Reports Server (NTRS)

This panorama of the region to the northeast of the lander was constructed to support the Sojourner Rover Team's plans to conduct an 'autonomous traverse' to explore the terrain away from the lander after science objectives in the lander vicinity had been met. The large, relatively bright surface in the foreground, about 10 meters (33 feet) from the spacecraft, in this scene is 'Baker's Bench.' The large, elongated rock left of center in the middle distance is 'Zaphod.'

This view was produced by combining 8 individual 'Superpan' scenes from the left and right eyes of the IMP camera. Each frame consists of 8 individual frames (left eye) and 7 frames (right eye) taken with different color filters that were enlarged by 500% and then co-added using Adobe Photoshop to produce, in effect, a super-resolution panchromatic frame that is sharper than an individual frame would be.

Mars Pathfinder is the second in NASA's Discovery program of low-cost spacecraft with highly focused science goals. The Jet Propulsion Laboratory, Pasadena, CA, developed and manages the Mars Pathfinder mission for NASA's Office of Space Science, Washington, D.C. JPL is a division of the California Institute of Technology (Caltech). The IMP was developed by the University of Arizona Lunar and Planetary Laboratory under contract to JPL. Peter Smith is the Principal Investigator.

1997-01-01

91

Protholithic age and geochemistry of magmatic rocks from the Serbo-Macedonian massif (south Serbia, southwest Bulgaria and east Macedonia)  

NASA Astrophysics Data System (ADS)

The Serbo-Macedonian Massif (SMM) represents a complex crystalline terrane situated between the two diverging branches of the Eastern Mediterranean Alpine orogenic system, the northeast-vergent Carpatho-Balkanides and the southwest-vergent Dinarides and the Hellenides. It is outcropping from the Pannonian basin in the north, to the Agean Sea in the south, along the central and southeastern Serbia, southwestern Bulgaria, eastern Macedonia and southern Greece. It's affiliation to European and/or African plate basement is still questionable due to the lack of reliable geochronological data and a detailed structural investigation. The SMM is the key area for understanding the bipolarity of the Alpine orogenic system, as well as the interaction of the Pannonian and Aegean back-arc extension during the Cenozoic time. The SMM is generally considered to comprise an Upper (low-grade) and a Lower (medium to high-grade) unit (Dimitrijevi?, 1959). The protoliths of both units are reported as volcano-sedimentary successions, which have been later intruded by magmatic rocks during several pulses. On our mission to discern the main magmatic episodes and the geodynamic evolution of the SMM; we have analysed zircon grains of metamorphic rocks from both units, as well as undeformed igneous rocks. LA-ICP-MS analyses were carried out on zircon grains in order to obtain the protolith ages and geochemical analyses were carried out on the total of nineteen samples from different magmatic rocks. Our first results reveal the presence of the Permo-Triassic (253±13 Ma) and a late Variscan magmatism (Carboniferous; 315±9 Ma) in the Serbian part of the SMM; additionally, the Ordovician (490-440 Ma) and the Cadomian (Cambrian; 505 Ma and older) event complete the magmatic evolution in the Serbian part of the SMM. The new geochronological constraints, together with the field relationships, allowed us to conclude: a) The Lower SMM consists of a Cadomian (Ediacaran-early Cambrian) volcano-sedimentary sequences and magmatics, which were intruded by Ordovician magmatic rocks; b) The Upper SMM (Vlasina and Morava unit) contains a volcano-sedimentary sequence, which is intruded by the Cadomian magmatic rocks; c) In contrast to the Lower complex, no Ordovician age magmatics were documented in the Upper unit, and d) Lower and Upper SMM were covered by Silurian-Devonian sedimentary sequence. The youngest magmatic event in the SMM occurred in the late Eocene, it is related to the intrusion of Surdulica granodiorite and subsequent latitic volcanism.

Anti?, M.; Peytcheva, I.; von Quadt, A.; Kounov, A.; Trivi?, B.; Serafimovski, T.; Tasev, G.; Gerdjikov, I.

2012-04-01

92

The Sidi Mohamed peridotites (Edough Massif, NE Algeria): Evidence for an upper mantle origin  

NASA Astrophysics Data System (ADS)

The Hercynian Edough massif is the easternmost crystalline massif of the Algerian coast. It consists of two tectonically superposed units composed of micaschists, gneisses, and peridotite. This study concentrates on the small and isolated Sidi Mohamed peridotite outcrop area (0.03 km2). The Sidi Mohamed peridotite is composed mainly of harzburgites (Mg-rich olivine and orthopyroxene as major minerals). The Ni (2051-2920 ppm), Cr (2368-5514 ppm) and MgO (~28-35 wt.%) whole-rock composition and the relative depletion in Nb make these harzburgites comparable to depleted peridotites related to a subduction zone. We suggest that the Sidi Mohamed ultramafic body was derived directly from the upper mantle and tectonically incorporated into the gneiss units of the Edough metamorphic core complex in a subduction environment.

Zobir, Soraya Hadj; Oberhänsli, Roland

2013-12-01

93

Deep mantle derived noble gases in metamorphic microdiamonds from Kokchetav massif, Kazakhstan  

Microsoft Academic Search

Metamorphic diamonds from the Kokchetav massif, northern Kazakhstan are considered to be crystallized from a C-O-H fluid during ultra-high pressure metamorphism of metasedimentary rocks subducted to the depth of 190-280 km [1]. The microdiamonds have been known for their ``unprecedentedly'' high 3He\\/4He of 6E-4 associated with very high He content [2,3]. The high 4He concentrations have been well explained by

H. Sumino; L. Dobrzhinetskaya

2009-01-01

94

Conceptual Ecological Model of the Chiquibul\\/Maya Mountain Massif, Belize  

Microsoft Academic Search

The Chiquibul\\/Maya Mountain Massif (CM3) is an approximately 1.25 million-acre area in southwestern Belize and is amongst the most intact tropical forests north of the Amazon. The CM3 has a variety of habitats that contribute to its valuable environmental services and high aesthetic value, but despite its protected area status, the CM3 is under increasing pressure from extraction of natural

Venetia S. Briggs; Frank J. Mazzotti; Rebecca G. Harvey; Tomma K. Barnes; Rafael Manzanero; Jan C. Meerman; Paul Walker; Zoe Walker

2012-01-01

95

Seismic image of the ice–bedrock contact at the Lobbia glacier, Adamello Massif, Italy  

Microsoft Academic Search

In the framework of a geophysical study to investigate the ice thickness on the Lobbia Glacier located in the Adamello Massif, Italy, we used multifold seismic data to constrain a joint gravity survey covering an area of about 3.7 km2. Two seismic lines were recorded above the maximum ice thickness as estimated from single-fold seismic data and gravity data collected

L. Levato; L Veronese; A Lozej; E Tabacco

1999-01-01

96

Emplacement age of the Songshugou ultramafic massif in the Qinling orogenic belt, and geologic implications  

Microsoft Academic Search

The Songshugou ultramafic massif is located to the north of the Shang?Dan fault, the Palaeozoic suture between the North and South China blocks. It is the largest Apline?type ultramafic body in the Qinling orogenic belt of central China, consisting mainly of dunite with a small amount of harzburgite and minor pyroxenite. We present new LA?ICP?MS U?Pb dating and trace element

Junfeng Liu; Yong Sun; Laixi Tong; Weidong Sun

2009-01-01

97

Stratigraphy and radiolarians of upper cretaceous sedimentary cover of the Arakapas ophiolite massif (Cyprus)  

Microsoft Academic Search

In the basal interval, sedimentary cover of the Arakapas ophiolite massif (southern Cyprus) is composed of metalliferous sediments\\u000a of the Perapedhi Formation that is divided into three sequences based on diverse radiolarian assemblages. These are basal\\u000a umbers of the Cenomanian age presumably (2–20 m), interlayering cherts and umbers of the Turonian-Coniacian (6–10 m), and\\u000a opoka-like cherts of the Coniacian-Santonian. Higher

L. G. Bragina; N. Yu. Bragin

2006-01-01

98

Strain localization on an oceanic detachment fault system, Atlantis Massif, 30°N, Mid-Atlantic Ridge  

NASA Astrophysics Data System (ADS)

Microstructural observations, mineral chemistry, and the spatial distribution of deformation fabrics recorded in outcrop samples collected from Atlantis Massif, the active inside corner high at 30°N, Mid-Atlantic Ridge, suggest that strain is localized near the subhorizontal domal surface hypothesized to be an exposed detachment fault. Deformation textures in peridotite and gabbro indicate that high-temperature (>500°C) strain occurred via crystal-plastic flow and diffusive mass transfer. Low-temperature (<400°C) shear zones containing brittle and semibrittle microboudinage textures in which tremolite, chlorite, and/or talc replace fractured serpentine or hornblende cut earlier formed high-temperature deformation fabrics in peridotite. Textures indicate strain was localized by cataclasis and reaction softening into zones of intense greenschist and subgreenschist grade metamorphism. Gabbro is only weakly deformed below amphibolite facies (<500°C), indicating that strain was partitioned into altered peridotite at low temperature. There is a clear relationship between deformation intensity and structural depth beneath the subhorizontal surface of the Massif. Discontinuous high-intensity crystal-plastic deformation fabrics are found at all structural depths (0-520 m) beneath the surface, indicating that high-temperature, granulite- and amphibolite-grade deformation was not localized in a single shear zone. In contrast, semibrittle and brittle low-temperature shear zones are concentrated less than 90 m structurally beneath the surface, and the most intensely brittlely deformed samples concentrated in the upper 10 m. Localization of brittle deformation fabrics near the upper surface of the massif supports the hypothesis that it is the exposed footwall of a detachment fault. The structural evolution of Atlantis Massif is therefore analogous to a continental metamorphic core complex. Strain was localized onto the fault by reaction-softening and fluid-assisted fracturing during greenschist- and subgreenschist-grade hydrothermal alteration of olivine, clinopyroxene, serpentine, and hornblende to tremolite, chlorite, and/or talc.

Schroeder, Timothy; John, Barbara E.

2004-11-01

99

Ultrarapid exhumation of ultrahigh-pressure diamond-bearing metasedimentary rocks of the Kokchetav Massif, Kazakhstan?  

Microsoft Academic Search

The diamond-bearing, ultrahigh-pressure Kokchetav Massif recrystallized at eclogite-facies conditions deep in the mantle at 180-km depth at 535±3 Ma, and yet new 40Ar\\/39Ar ages suggest that it may have been exhumed to crustal depths (as indicated by closure of mica to Ar loss) by ?529 Ma. These data indicate a possible exhumation rate of tens of kilometers per million years,

Bradley R. Hacker; Andrew Calvert; R. Y. Zhang; W. Gary Ernst; J. G. Liou

2003-01-01

100

Geochemistry and age of ultrahigh pressure metamorphic rocks from the Kokchetav massif (Northern Kazakhstan)  

Microsoft Academic Search

Isotopic and geochemical data of the Zerenda series metamorphic rocks from the Kokchetav massif are reported. Some of these\\u000a rocks contain microdiamond inclusions in garnets and other indicators of ultrahigh pressure metamorphism (P?>?40?kbar, T?=?900–1000?C). The diamond-bearing rocks exhibit distinctive geochemical characteristics compared to typical crustal rocks.\\u000a The REE patterns range from LREE depleted to slightly LREE enriched [chondrite normalized (La\\/Yb)N–

V. S. Shatsky; E. Jagoutz; N. V. Sobolev; O. A. Kozmenko; V. S. Parkhomenko; M. Troesch

1999-01-01

101

Crust and upper mantle structure of the Bohemian Massif from the dispersion of seismic surface waves  

Microsoft Academic Search

Summary The phase velocity dispersion of Rayleigh waves for the Moxa-Vienna (MOX-VIE) and Moxa-Kašperské Hory (MOX-KHC) profiles, and of both Rayleigh and Love waves for the Kašperské Hory-Ksiaz (KHC-KSP) profile have been measured and inverted into models of shearwave velocity vs. depth. The three paths cross, respectively, the central part of the Bohemian Massif, its western margin, and the Bohemian

Axel Plesinger; Horst Neunhöfer; Erhard Wielandt

1991-01-01

102

Extensional and compressional faults in the Everest Lhotse massif, Khumbu Himalaya, Nepal  

Microsoft Academic Search

Two large-scale north-dipping, low-angle normal faults cut the Everest massif at the top of the High Himalayan slab in Nepal. The upper fault the Qomolangma Detachment, follows the north slope of Everest from above the 'Yellow Band' at c. 8500 m on the Southwest Face down to the Rongbuk glacier. On the south side of Everest this fault places unmetamorphosed

M. P. SEARLE

1999-01-01

103

Strain localization on an oceanic detachment fault system, Atlantis Massif, 30°N, Mid-Atlantic Ridge  

Microsoft Academic Search

Microstructural observations, mineral chemistry, and the spatial distribution of deformation fabrics recorded in outcrop samples collected from Atlantis Massif, the active inside corner high at 30°N, Mid-Atlantic Ridge, suggest that strain is localized near the subhorizontal domal surface hypothesized to be an exposed detachment fault. Deformation textures in peridotite and gabbro indicate that high-temperature (>500°C) strain occurred via crystal-plastic flow

Timothy Schroeder; Barbara E. John

2004-01-01

104

Drainage network geometry versus tectonics in the Argentera Massif (French Italian Alps)  

NASA Astrophysics Data System (ADS)

The Argentera Massif (French-Italian Alps), with its uniform lithology, was selected to evaluate how known Plio-Pleistocene tectonics have conditioned the drainage network geometry. The drainage network was automatically derived and ordered from a 10 m-resolution DEM. On hillshade images, alignments of morphological features were identified. The Massif was subdivided into 22 domains of 50 km 2 within which the directions of every river channel segment and the direction of the aligned morphological features were compared and contrasted with the strike of tectonic structures measured in the field. Results suggest that the Argentera drainage system is variously controlled by recent tectonics, depending on the Massif sector taken into account. In the NW sector, the vertical uplift is less because the strain has been accommodated in an oblique direction along a lateral thrust. In the SE sector, strain in a predominantly vertical direction along a frontal thrust has resulted in a major vertical displacement. Accordingly, the NW sector is characterized by (i) a strong geometric relationship between the main tectonic structures and the directions of river channels, (ii) longitudinal main rivers bordering the Massif, and (iii) a general trellis pattern within the domains. In the SE sector, the prolonged uplift has forced an original longitudinal drainage system to develop as a transverse system. This change has occurred by means of fluvial captures that have been identified by the presence of windgaps, fluvial elbows and knickpoints. At the domain scale, intense uplift of the SE sector has prompted the drainage pattern to evolve as a dendritic type with no clear influence of structure in the channel orientations.

Ribolini, Adriano; Spagnolo, Matteo

2008-01-01

105

First SHRIMP U Pb zircon dating of granulites from the Kontum massif (Vietnam) and tectonothermal implications  

NASA Astrophysics Data System (ADS)

The Kontum massif in Central Vietnam represents the largest continuous exposure of crystalline basement of the Indochina craton. The central Kontum massif is chiefly made of orthopyroxene granulites (enderbite, charnockite) and associated rocks of the Kannack complex. Mineral assemblages and geothermobarometric studies have shown that the Kannack complex has severely metamorphosed under granulite facies corresponding to P-T conditions of 800-850°C and 8±1 kbars. Twenty-three SHRIMP II U-Pb analyses of eighteen zircon grains separated from a granulite sample of the Kannack complex yield ca 254 Ma, and one analysis gives ca 1400 Ma concordant age for a zoned zircon core. This result shows that granulites of the Kannack complex in the Kontum massif have formed from a high-grade granulite facies tectonothermal event of Indosinian age (Triassic). The cooling history and subsequent exhumation of the Kannack complex during Indosinian times ranged from ˜850°C at ca 254 Ma to ˜300°C at 242 Ma, with an average cooling rate of ˜45°C/Ma.

Nam, Tran Ngoc; Sano, Yuji; Terada, Kentaro; Toriumi, Mitsuhiro; Van Quynh, Phan; Dung, Le Tien

2001-02-01

106

U Pb dating of high temperature metamorphic episodes in the Kon Tum Massif (Vietnam)  

NASA Astrophysics Data System (ADS)

In Vietnam, recent studies demonstrated that the Kon Tum Massif was part of the Indosinian mountain system, together with the Truong Son Belt. One sector of the Kon Tum Massif (Song Ba valley) is a granulite facies terrain for which Ar-Ar and U-Pb ages cluster around 245-250 Ma. In the area of Song Bien river, also metamorphosed under granulite facies conditions, Ar-Ar ages of 410 Ma are displayed by biotite. In this study, U-Pb dating of monazite and zircon has been used to understand the reason for these two groups of ages, taking into account the metamorphic mineral assemblages related to granulite facies metamorphism in the two districts. For granulites of Song Ba valley, ages of 245-250 Ma are confirmed from monazites. In the Song Bien district, ages of 465-470 Ma displayed by monazites are interpreted to correspond to the metamorphic climax. Zircons from one of these samples record the age of anatexis that has affected the granulitic rocks. The younger age recorded in the Song Ba valley is considered to reflect high temperature related to charnockitic intrusions emplaced near the end of the Indosinian orogeny, overprinting the earlier formed granulites and resetting the U-Pb and Ar-Ar ages. For the first time, two HT events are dated in the Kon Tum Massif, one occurring during the Ordovician and the other during the Permo-Triassic.

Roger, Françoise; Maluski, Henri; Leyreloup, André; Lepvrier, Claude; Truong Thi, Phan

2007-05-01

107

Re-Os isotopic evidence for a lower crustal origin of massif-type anorthosites  

PubMed

Massif-type anorthosites are large igneous complexes of Proterozoic age. They are almost monomineralic, representing vast accumulations of plagioclase with subordinate pyroxene or olivine and Fe-Ti oxides--the 930-Myr-old Rogaland anorthosite province in southwest Norway represents one of the youngest known expressions of such magmatism. The source of the magma and geodynamic setting of massif-type anorthosites remain long-standing controversies in Precambrian geology, with no consensus existing as to the nature of the parental magmas or whether these magmas primarily originate in the Earth's mantle or crust. At present, massif-type anorthosites are believed to have crystallized from either crustally contaminated mantle-derived melts that have fractionated olivine and pyroxenes at depth or primary aluminous gabbroic to jotunitic melts derived from the lower continental crust. Here we report rhenium and osmium isotopic data from the Rogaland anorthosite province that strongly support a lower crustal source for the parental magmas. There is no evidence of significantly older crust in southwest Scandinavia and models invoking crustal contamination of mantle-derived magmas fail to account for the isotopic data from the Rogaland province. Initial osmium and neodymium isotopic values testify to the melting of mafic source rocks in the lower crust with an age of 1,400-1,550 Myr. PMID:10866196

Schiellerup; Lambert; Prestvik; Robins; McBride; Larsen

2000-06-15

108

Mapping of the Ronda peridotite massif (Spain) from AVIRIS spectro-imaging survey: A first attempt  

NASA Technical Reports Server (NTRS)

In both AVIRIS and ISM data, through the use of mixing models, geological boundaries of the Ronda massif are identified with respect to the surrounding rocks. We can also yield first-order vegetation maps. ISM and AVIRIS instruments give consistent results. On the basis of endmember fraction images, it is then possible to discard areas highly vegetated or not belonging to the peridotite massif. Within the remaining part of the mosaic, spectro-mixing analysis reveals spectral variations in the peridotite massif between the well-exposed areas. Spatially organized units are depicted, related to differences in the relative depth of the absorption band at 1 micron, and it may be due to a different pyroxene content. At this stage, it is worth noting that, although mineralogical variations observed in the rocks are at a sub-pixel scale for the airborne analysis, we see an emerging spatial pattern in the distribution of spectral variations across the massif which might be prevailingly related to mineralogy. Although it is known from fieldwork that the Ronda peridotite massif exhibits mineralogical variations at local scale in the content of pyroxene, and at regional scale in different mineral facies, ranging from garnet-, to spinel- to plagioclase-lherzolites, no attempt has been done yet to produce a synoptic map relating the two scales of analysis. The present work is a first attempt to reach this objective, though a lot more work is still required. In particular, for the purpose of mineralogical interpretation, it is critical to relate the airborne observation to field work and laboratory spectra of Ronda rocks already obtained, with the use of image endmembers and associated reference endmembers. Also, the pretty rough linear mixing model used here is taken as a 'black-box' process which does not necessarily apply correctly to the physical situation at the sub-pixel level. One may think of using the ground-truth observations bearing on the sub-pixel statistical characteristics (texture, structural pattern, surface distribution and vegetation contribution (grass,..)) to produce a more advanced mixing model, physically appropriate to the geologic and environmental contexts.

Pinet, P. C.; Chabrillat, S.; Ceuleneer, G.

1993-01-01

109

Geological mapping of the Rainbow Massif, Mid-Atlantic Ridge, 36°14'N  

NASA Astrophysics Data System (ADS)

The Rainbow hydrothermal field at 36°14'N on the Mid-Atlantic Ridge is one of the few known sites hosted in ultramafic basement. The Rainbow Massif is located along the non-transform offset between the AMAR and South AMAR second-order ridge segments, and presents the characteristic dome morphology of oceanic core complexes, although no corrugated surface has been observed so far. One of the objectives of Cruises MOMAR DREAM (July 2007, R/V Pourquoi Pas ?; Aug-Sept 2008, R/V Atalante) was to study the petrological and structural context of the hydrothermal system at the scale of the Rainbow Massif. Our geological sampling complements previous ones achieved during Cruises FLORES (1997) and IRIS (2001), and consisted in dredge hauls, and submersible dives by manned submersible Nautile and ROV Victor. The tectonics of the Rainbow Massif is dominated by a N-S trending fault pattern on the western flank of the massif, and a series of SW-NW ridges on its northeastern side. The active hydrothermal site is located in the area were these two systems crosscut. The most abundant recovered rock type is peridotite (harzburgite and dunite) that presents a variety of serpentinization styles and intensity, and a variety of deformation styles (commonly undeformed, sometimes displaying ductile or brittle foliations). Serpentinites are frequently oxidized. Some peridotite samples have melt impregnation textures. Massive chromitite was recovered in one dredge haul. Variously evolved gabbroic rocks were collected as discrete samples or as centimeter to decimeter-thick dikes in peridotites. Basalts and fresh basaltic glass were also sampled in talus and sediments on the southwestern and northeastern flanks of the massif. Our sampling is consistent with the lithological variability encountered in oceanic core complexes along the Mid-Atlantic Ridge and Southwest Indian Ridge. The stockwork of the hydrothermal system has been sampled on the western side of the present-day hydrothermal field, along N-S trending normal fault scarps, and within the talus underneath. It is made of massive sulfides, strongly altered serpentinites, and breccias containing elements of iron sulfide/oxide impregnated serpentinites. * K. Bukas, V. Cueff Gauchard, L. Durand, F. Gaill, C. Konn, F. Lartaud, N. Le Bris, G. Musset, A. Nunes, J. Renard, V. Riou, A. Tasiemski, P. Torres, I. Vojdani, M. Zbinden

Ildefonse, B.; Fouquet, Y.; Hoisé, E.; Dyment, J.; Gente, P.; Thibaud, R.; Bissessur, D.; Yatheesh, V.; Momardream 2008 Scientific Party*, T.

2008-12-01

110

Conditions of crystallization of the Ural platinum-bearing ultrabasic massifs: evidence from melt inclusions  

NASA Astrophysics Data System (ADS)

Conditions of the Ural platinum-bearing ultramafic massifs formation attract attention of numerous researchers. A most important peculiarity of such plutons is their dunite cores, to which commercial Pt deposits are related. There are a different opinions about genesis of these massifs and usual methods not always can solve this question. As a result of melt inclusions study in the Cr-spinel the new data on physical and chemical parameters of dunite crystallization of the Nizhnii Tagil platinum-bearing ulrabasic massif (Ural) was obtained. The comparative analysis of Cr-spinels, containing melt inclusions, has shown essential differences of these minerals from chromites of the ultrabasic ophiolite complexes and of modern oceanic crust. Contents of major chemical components in the heated and quenched melt inclusions are close to those in the picrite and this testifies dunite crystallization from ultrabasic (to 24 wt.% MgO) magma. On the variation diagrams for inclusions in Cr-spinel the following changes of chemical compositions are established: during SiO2 growth there is falling of FeO, MgO, and increase of CaO, Na2O contents. Values of TiO2, Al2O3, K2O and P2O5 remain as a whole constant. Comparing to the data on the melt inclusions in Cr-spinel from the Konder massif, we see that values of the most part of chemical components (SiO2, TiO2, K2O, P2O5) are actually overlapped. At the same time, for the Nizhnii Tagil platinum-bearing massif the big maintenances of FeO and CaO in inclusions are marked. Distinct dependence of the majority of components from the MgO content in inclusions is observed: values TiO2, Al2O3 FeO, CaO and Na2O fall at transition to more magnesia melts. On the peculiarities of distribution of petrochemical characteristics melt inclusions in considered Cr-spinels are co-ordinated with the data on evolution of compositions of melts and rocks of model stratified ultramafic plutons during their crystallization in the magmatic chambers. On the diagrams an association of melt inclusions with the data on inclusions in Cr-spinels from the Konder platinum-bearing and Karashat ophiolite massifs is clearly visible. Our computer simulations on the basis of melt inclusion compositions by the PETROLOG program package (Danyushevsky, Plechov, 2011) allowed to evaluate the crystallization temperature of dunites of the Nizhnii Tagil platinum-bearing massif in the intrusive chamber. The most part of olivine was formed from 1430 to 1360°C and continued to crystallize until to 1280°C. Cr-spinel crystallized from melts in the range of temperatures from 1345 to 1310°C. The investigations were supported by the Russian Foundation for Basic Research (project No 12-05-00959) and by Projects N 2.1 and N 50.

Simonov, Vladimir; Puchkov, Victor; Prikhod'ko, Vladimir; Stupakov, Sergey; Kotlyarov, Alexey

2013-04-01

111

Climate change in the Brazilian northeast  

NASA Astrophysics Data System (ADS)

Climate Change, Impacts and Vulnerabilities in Brazil: Preparing the Brazilian Northeast for the Future; Natal, Brazil, 27 May to 01 June 2012 The variability of the semiarid climate of the Brazilian northeast has enormous environmental and social implications. Because most of the population in this area depends on subsistence agriculture, periods of severe drought in the past have caused extreme poverty and subsequent migration to urban centers. From the ecological point of view, frequent and prolonged droughts can lead to the desertification of large areas. Understanding the causes of rainfall variability, in particular periods of severe drought, is crucial for accurate forecasting, mitigation, and adaptation in this important region of Brazil.

Rodrigues, Regina R.; Haarsma, Reindert J.; Hoelzemann, Judith J.

2012-10-01

112

19. INTERIOR OF NORTHEAST REAR BEDROOM SHOWING ALUMINUMFRAME SLIDING GLASS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

19. INTERIOR OF NORTHEAST REAR BEDROOM SHOWING ALUMINUM-FRAME SLIDING GLASS WINDOWS. VIEW TO NORTHEAST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

113

3. TWOSTALL GARAGE SOUTHEAST AND NORTHEAST SIDES. VIEW TO WEST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. TWO-STALL GARAGE SOUTHEAST AND NORTHEAST SIDES. VIEW TO WEST. - Rainbow Hydroelectric Facility, Two Stall Garage, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

114

4. FOREMAN'S HOUSE. NORTHEAST SIDE. VIEW TO SOUTHWEST. Rainbow ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. FOREMAN'S HOUSE. NORTHEAST SIDE. VIEW TO SOUTHWEST. - Rainbow Hydroelectric Facility, Foreman's House, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

115

1. TWOSTALL GARAGE. FRONT (SOUTHWEST) SIDE. VIEW TO NORTHEAST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. TWO-STALL GARAGE. FRONT (SOUTHWEST) SIDE. VIEW TO NORTHEAST. - Rainbow Hydroelectric Facility, Two Stall Garage, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

116

2. TOOL HOUSE. NORTHEAST AND SOUTHEAST SIDES. VIEW TO WEST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. TOOL HOUSE. NORTHEAST AND SOUTHEAST SIDES. VIEW TO WEST. - Rainbow Hydroelectric Facility, Tool House, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

117

4. HOUSE No. 16. NORTHEAST SIDE. VIEW TO SOUTHWEST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. HOUSE No. 16. NORTHEAST SIDE. VIEW TO SOUTHWEST. - Rainbow Hydroelectric Facility, House No. 16, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

118

3. CLUBHOUSE. FRONT (SOUTHEAST) FACADE AND NORTHEAST SIDE. VIEW TO ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. CLUBHOUSE. FRONT (SOUTHEAST) FACADE AND NORTHEAST SIDE. VIEW TO WEST. - Rainbow Hydroelectric Facility, Clubhouse, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

119

6. CLUBHOUSE. SOUTHWEST SIDE. VIEW TO NORTHEAST. Rainbow Hydroelectric ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. CLUBHOUSE. SOUTHWEST SIDE. VIEW TO NORTHEAST. - Rainbow Hydroelectric Facility, Clubhouse, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

120

2. THREESTALL GARAGE. NORTHEAST SIDE. VIEW TO SOUTHWEST. Rainbow ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. THREE-STALL GARAGE. NORTHEAST SIDE. VIEW TO SOUTHWEST. - Rainbow Hydroelectric Facility, Three Stall Garage, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

121

2. FOREMAN'S HOUSE. SOUTHWEST SIDE. VIEW TO NORTHEAST. Rainbow ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. FOREMAN'S HOUSE. SOUTHWEST SIDE. VIEW TO NORTHEAST. - Rainbow Hydroelectric Facility, Foreman's House, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

122

4. CLUBHOUSE. NORTHEAST SIDE. VIEW TO SOUTHWEST. Rainbow Hydroelectric ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. CLUBHOUSE. NORTHEAST SIDE. VIEW TO SOUTHWEST. - Rainbow Hydroelectric Facility, Clubhouse, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

123

1. THREESTALL GARAGE. SOUTHEAST AND NORTHEAST SIDES. VIEW TO WEST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. THREE-STALL GARAGE. SOUTHEAST AND NORTHEAST SIDES. VIEW TO WEST. - Rainbow Hydroelectric Facility, Three Stall Garage, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

124

1. TOOL HOUSE. NORTHEAST AND NORTHWEST SIDES. VIEW TO SOUTHEAST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. TOOL HOUSE. NORTHEAST AND NORTHWEST SIDES. VIEW TO SOUTHEAST. - Rainbow Hydroelectric Facility, Tool House, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

125

55. VIEW TO NORTHEAST OF MOTOR AND REDUCTION GEAR NO. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

55. VIEW TO NORTHEAST OF MOTOR AND REDUCTION GEAR NO. 1: View towards the northeast of Motor and Reduction Gear No. 1, installed in 1957. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

126

53. INTERIOR VIEW LOOKING NORTH NORTHEAST SHOWING THE REMAINS OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

53. INTERIOR VIEW LOOKING NORTH NORTHEAST SHOWING THE REMAINS OF A WOODEN SETTLING BOX IN THE BACKGROUND RIGHT. AMALGAMATING PANS IN THE FOREGROUND. - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

127

Interior view of northeast unit master bedroom, looking into sleeping ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Interior view of northeast unit master bedroom, looking into sleeping porch, facing northeast - MacDill Air Force Base, Double Non-Commissioned Officers' Quarters, 7418 Hanger Loop Drive, Tampa, Hillsborough County, FL

128

9. Interior view of conference room; showing exterior windows; northeast ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. Interior view of conference room; showing exterior windows; northeast corner of north wing; view to northeast. - Ellsworth Air Force Base, Administration Office, 2704 George Drive, Blackhawk, Meade County, SD

129

2. Light tower and keeper's house, view southwest, north northeast ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. Light tower and keeper's house, view southwest, north northeast side of tower, northeast and northwest sides of keeper's house - Wood Island Light Station, East end of Wood Island, at mouth of Soo River, Biddeford Pool, York County, ME

130

2. General context view of Express Building, looking northeast, with ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. General context view of Express Building, looking northeast, with Division Street in foreground, showing relationship to the Bend Depot - American Railway Express Company Freight Building, 1060 Northeast Division Street, Bend, Deschutes County, OR

131

11. DETAIL SHOWING ROLLING ENGINE DECK AND NORTHEAST TRUSS OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. DETAIL SHOWING ROLLING ENGINE DECK AND NORTHEAST TRUSS OF SUPERSTRUCTURE. Looking northeast. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Test Stand 1-A, Test Area 1-120, north end of Jupiter Boulevard, Boron, Kern County, CA

132

NORTHEAST VIEW OF FOUNDRY FROM TOP OF GREY IRON CUPOLA ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

NORTHEAST VIEW OF FOUNDRY FROM TOP OF GREY IRON CUPOLA SHOWING CORE ROOM ROOF DIRECTLY NORTHEAST, GREY IRON FOUNDRY TO THE RIGHT, MALLEABLE IRON CUPOLAS AND FOUNDRY NORTHEAST OF GREY IRON FOUNDRY WITH THE BRASS FOUNDRY IN THE REAR. - Stockham Pipe & Fittings Company, 4000 Tenth Avenue North, Birmingham, Jefferson County, AL

133

Amphibole and phlogopite genesis in pyroxenites from the Beni Bousera peridotite massif (Rif, Morocco): Evidence for two different metasomatic episodes.  

NASA Astrophysics Data System (ADS)

The garnet websterites and garnet clinopyroxenites from the Beni Bousera peridotite massif contain varying amount of amphibole ± plogophite. The presence of amphibole in both pyroxenites indicates that post-formation metasomatism has affected these pyroxenites. Textural observations, associated with major and trace element compositions of minerals allow distinguishing two metasomatic episodes, occurring at two different periods of the evolution of the Beni Bousera massif. Garnet websterites record interactions with LREE-rich silicate melt before the uplift of the massif, and crystallization of interstitial amphibole and phlogopite. Partition coefficients between amphibole and matrix clinopyroxene and garnet indicate that the former is in chemical equilibrium with the pyroxenite minerals. The fluid responsible for the metasomatic episode is an alkali silicate melt originating from the partial melting of a peridotitic source similar to the source of the recent basaltic magmas erupted in Morocco. Garnet clinopyroxenites show the crystallization of amphibole and plagioclase at low P-T conditions during the ascent of the Beni Bousera massif. Amphiboles are in chemical disequilibrium with the pyroxenite matrix minerals. The melt responsible for this event is depleted in LREE and highly enriched in HREE. Such a melt can be produced by partial melting of a garnet-bearing source, with garnet as a melting phase, similar to the garnet pyroxenites from the Beni Bousera massif. Keywords: Metasomatism; amphibole; garnet websterite; garnet clinopyroxenite; silicate melt; Beni Bousera, partial melting.

El Atrassi, F.; Chazot, G.; Brunet, F.; Bouybaouene, M.; Chopin, C.

2012-04-01

134

Monitoring of soil and air-rock temperatures in the Western Massif of the Picos de Europa (Spain)  

NASA Astrophysics Data System (ADS)

In this paper we study the ground thermal regime and air-rock interface in the Western Massif of the Picos de Europa (Cantabrian Range, Spain). This calcareous massif is highly affected by karstification processes. Quaternary glaciers, fluvio-torrential processes and present-day periglacial processes also contribute to explain the landforms present in this massif. Up to 9 dataloggers were installed during 6 years in different sites in terms of altitude, orientation, slope and geomorpolohical setting recording temperatures every two hours. The number of freeze-thaw cycles in the soil(between 0 and 16) was controlled by the depth of the snow cover. The temperatures in the interface rock-air showed between 30-60 cycles, reaching 119 and 130 during the year 2007-2008. Extreme minimum temperatures in the soil oscillate between 0.3 and -6.3, while in the rocky walls the loggers recorded temperatures between -7.3 and -14.3°C. Monitoring of soil temperatures around the ice patch - the only one in the massif today - resulted in slightly negative mean annual temperatures. These conditions may reveal the existence of sporadic permafrost on debris that cover the ice patch. Both the buried ice and the permafrost are in disequilibrium with the current environmental conditions of the massif.

Ruiz-Fernández, Jesús; Vieira, Gonçalo; García, Cristina

2013-04-01

135

Structural Pattern, P-t Conditions and Timing of Alpine Deformation In The Argentera Massif (western Alps)  

NASA Astrophysics Data System (ADS)

The Argentera massif is located in the southern part of the Western Alps and belongs to the paleo-European basement. It forms the southernmost crystalline massif of the external domain. Hercynian high-grade metamorphic rocks and Carboniferous sedi- mentary basins were intruded at the end of the Hercynian orogen by the calc-alkaline Argentera granite. This massif experienced a polyphase deformation history, Hercy- nian and Alpine. The Alpine history is characterized by the development of a network of NNW-SSE trending transcurrent dextral ductile shear zones branching into E-W ductile thrust faults with a top to the south displacement. We interpret the uplift of the massif as the result of movements along these shear zones, relative to a sub-meridian compressional event. Our P-T condition estimates indicate a regional temperature at ca 350 rC for pressure at 0.35-0.4 GPa for Alpine metamorphism implying a mini- mum burial of 14 km for the Argentera massif. 39Ar-40Ar analyses of neo-crystallized phengites collected within a major E-W alpine crosscutting the late Hercynian Argen- tera granite shear zone (Frema Morte) yielded an age at ca 22.5 Ma. This is the first absolute age constraint of a late Alpine metamorphism in the external crystalline mas- sifs of the Western Alps. This metamorphism could result from overload imposed by thrusting of the internal nappes between 28 Ma and 22.5 Ma.

Corsini, M.; Caby, R.; Ruffet, G.

136

How Northeast Asians View Their Security.  

National Technical Information Service (NTIS)

When the cold war dominated international politics, the primary objective of U.S. security policy in Northeast Asia, as elsewhere, was the containment of the Soviet Union. Now, however, with the Soviet threat greatly diminished and the constraints of a bi...

T. L. Wilborn

1991-01-01

137

Electric power grid interconnection in Northeast Asia  

Microsoft Academic Search

In spite of regional closeness, energy cooperation in Northeast Asia has remained unexplored. However, this situation appears to be changing. The government of South Korea seems to be very enthusiastic for power grid interconnection between the Russian Far East and South Korea to overcome difficulties in finding new sites for building power facilities to meet its need for increased electricity

Won-Cheol Yun; Zhong Xiang Zhang

2006-01-01

138

COASTAL 2000 MONITORING IN THE NORTHEAST  

EPA Science Inventory

Coastal 2000 is a partnership between the U.S. Environmental Protection Agency and coastal states to develop a national coastal monitoring program. The Northeast portion of Coastal 2000 includes states from Delaware to Maine. This joint effort will provide a nationwide assessment...

139

Stratigraphic Cross Section of Northeast Texas  

NSDL National Science Digital Library

Cretaceous sedimentary rocks of Northeast Texas provide important clues about paleogeography, paleotectonics, and sea level fluctuation. This website describes several of these rock units and the geologic information they supply. An unpublished report with a thorough discussion, map, cross section, and numerous references is provided. Specific topics include Cretaceous stratigraphy, lithostratigraphic and biostratigraphic correlation, ammonites, Western Interior Seaway, Skull Creek Seaway, paleogeography, and paleotectonics.

Keith, Minor; Cretaceousfossils.com

140

Magnetic Anomalies in the Northeast Atlantic.  

National Technical Information Service (NTIS)

A pair of geomagnetic anomaly charts printed on a Mercator projection at a scale of 1:2.4 million for the region of the northeast Atlantic from 32 to 62 N and from 0 to 31 W is presented. The charts are compiled from observations along ship's tracks up to...

D. G. Roberts M. T. Jones P. M. Hunter

1985-01-01

141

Chinese Northeast Asia policies and the tragedy of Northeast Asia's security architecture  

Microsoft Academic Search

China's status-quo-oriented post-Cold-War grand strategy of promoting cooperative security and multipolarity on the basis of the UN system is not applied in Northeast Asia. China's definition of its interests in Northeast Asia runs up against those promoted by the US alliance system, and no common political framework exists to encourage Beijing and Washington to adopt definitions that correspond to global

Liselotte Odgaard

2008-01-01

142

Genesis of platinum-bearing ultrabasic massifs in the plutonic chambers: evidence from melt inclusions  

NASA Astrophysics Data System (ADS)

Platinum-bearing ultramafic massifs occur as bodies of concentrically zonal inner structures due to the successive replacement of dunite with pyroxenite and gabbro from their cores to margins. A most important peculiarity of such massifs is their dunite cores, to which commercial Pt deposits are related. There are a different opinions about genesis of these massifs and geological, petrological, geochemical methods not always can solve this question. We found melt inclusions in Cr-spinel from dunites of the platinum-bearing Konder and Inagli massifs (Siberian Platform) and this provides direct evidence of the participation of magmatic systems in the crystallization of ultrabasic rocks. Contents of most major chemical components in the heated and quenched melt inclusions are close to those in biotite-pyroxene picrite and this testifies dunite crystallization from ultrabasic alkaline magma. Ion probe analyses of melt inclusions in Cr-spinel yielded relatively high water concentration in ultrabasic melts of the Konder (0.45-0.53 wt %) and Inagli (up to 0.63 wt %) massifs. These data are generally close to the water contents in magma that produced dunites of ophiolites (0.58-0.65 wt %) (Simonov et al., 2009). The REE patterns of inclusions in Cr-spinel from the Konder and Inagli dunites show a pronounced negative slope with strong enrichment of LREE relative to HREE, as is typical of plume-related magmatic systems of oceanic islands and continental hotspots. The values of such indicator ratios as Nb/U (23.4), Zr/Nb (7.20), and Th/U (3.0) of inclusions practically exactly coincide with those of glasses from areas of continental hotspots (Naumov et al., 2010). At the Nb/Y-Zr/Y diagram the data points of the inclusions plot within the field of melts with a plume source. As a whole the patterns of trace elements and REE in melt inclusions in the Cr-spinel provide evidence that mantle plumes affected the magmatic events, that produced dunites of the studied platinum-bearing ultramafic massifs. Our simulations on the basis of melt inclusion compositions by the PLUTON program package (Lavrenchuk, 2004) allowed to evaluate the crystallization temperature of dunites in the intrusive chambers. The most part of olivine was crystallized at 1460-1300°C and then, when the melt became less magnesian, this mineral continued to crystallize until to 1230°. The parameters evaluated with the help of another program (PETROLOG; Danyushevsky, 2001), based on data on melt inclusions, indicate that minimum temperature of the melts, from which olivine crystallized, was approximately 1230°. The model melt compositions (PLUTON program) are in good agreement with data on inclusions in Cr-spinel. For example, the calculated melt composition with 25.5 wt % MgO corresponds to 2.82 wt % 2, respectively, and melt inclusions with the same MgO (25.7 wt %) contain practically exactly coinciding K2O concentration of 2.7 wt %.

Simonov, V.; Prikhod'ko, V.

2012-04-01

143

Metamorphic evolution of pelitic-semipelitic granulites in the Kon Tum massif (south-central Vietnam)  

NASA Astrophysics Data System (ADS)

Pelitic and semipelitic anatectic granulites form one of the major lithological units in Kan Nack complex of the Kon Tum massif (in south-central Vietnam), which comprises HT metamorphic and magmatic rocks including granulites and charnockites is classically regarded as the older part of the Gondwana-derived Indosinia terrain. Metamorphic evolution study of pelitic granulite, the most abundant among granulites exposed in this massif, facilitates to understand that tectonic setting take place during the Indosinian time. The paragenetic assemblages, mineral chemistry, thermobarometry and P-T evolution path of pelitic-semipelitic granulites from Kon Tum massif has been studied in detail. Petrographic feature demonstrates that the pelitic granulite experienced prograde history, from pregranulitic conditions in the amphibolite facies up to the peak granulitic assemblages. Successive prograde reactions led to the temperature-climax giving rise to assemblages with cordierite-hercynite and cordierite-hercynite-K-feldspar. Then, as attested by the mineralogic association occurring in cordieritic coronas, these rocks have been affected by retrograde conditions coeval with a decrease of the pressure. Thermobarometic results show that the highest temperature obtained by ksp/pl thermometry is 850 °C and the highest pressure obtained by GASP (Garnet Alumino-Silicate Plagioclase) is 7.8 kbar. The obtained clockwise P-T evolution path involving heating decompression, then nearly isothermal decompression and nearly isobar cooling conditions shows that high temperature-low pressure metamorphism of the studied pelitic anatectic granulites of Kan Nack complex occurred possibly in extensional setting during the Indosinian orogeny of 260-240 Ma in age.

Tích, Vu Van; Leyreloup, Andrey; Maluski, Henry; Lepvrier, Claude; Lo, Chinh-hua; V??ng, Nguy?n V.

2013-09-01

144

Thrust tectonics in the North Patagonian Massif (Argentina): Implications for a Patagonia plate  

NASA Astrophysics Data System (ADS)

In the northeastern segment of the North Patagonian Massif (southern Argentina), S to SW directed thrusting affected a Late Proterozoic to Cambrian phyllite succession and the Silurian to Lower Devonian Sierra Grande formation. Thrust tectonics was partly combined with the formation of mylonites and followed by the intrusion of the Navarrete granodiorite. Mylonites of the Tardugno granitoids are attributed to a ductile shear horizon in the subsurface. As second stage of deformation after cessation of thrusting, ˜NW-SE compression led to the formation of widely distributed fold structures around NE-SW trending axes as well as SE directed reverse faults. It was followed by the late kinematic intrusion of a porphyric granite as final pulse of the Navarrete Intrusive Complex. Local folding around ˜N-S to NW-SE trending axes represents the final stage of the compressive deformational history. Thrust tectonics plus subsequent stages of deformation can be assigned to the Late Paleozoic time interval, probably the Permian. They are seen in conjunction with the formation of granite mylonites within the North Patagonian Massif, the Cerro de los Viejos granite mylonite of the La Pampa Province, and the compressive structures in the Sierras Australes fold-and-thrust belt north of the boundary between Patagonia and Gondwana South America. Also, the lack of Early Paleozoic (Famatinian) deformation in this part of the North Patagonian Massif and the inferred boundary of the Early Paleozoic Cuyania (Precordillera) Terrane north of Patagonia support the interpretation that extra-Andean Patagonia collided with Gondwana South America during the Gondwanide orogeny. It is possible that Patagonia was part of a plate and that the long Gondwanide fold belt represented its collision zone.

von Gosen, W.

2003-02-01

145

Catalog of Apollo 17 rocks. Volume 1: Stations 2 and 3 (South Massif)  

NASA Technical Reports Server (NTRS)

The Catalog of Apollo 17 Rocks is a set of volumes that characterize each of 334 individually numbered rock samples (79 larger than 100 g) in the Apollo 17 collection, showing what each sample is and what is known about it. Unconsolidated regolith samples are not included. The catalog is intended to be used by both researchers requiring sample allocations and a broad audience interested in Apollo 17 rocks. The volumes are arranged geographically, with separate volumes for the South Massif and Light Mantle, the North Massif, and two volumes for the mare plains. Within each volume, the samples are arranged in numerical order, closely corresponding with the sample collection stations. The present volume, for the South Massif and Light Mantle, describes the 55 individual rock fragments collected at Stations two, two-A, three, and LRV-five. Some were chipped from boulders, others collected as individual rocks, some by raking, and a few by picking from the soil in the processing laboratory. Information on sample collection, petrography, chemistry, stable and radiogenic isotopes, rock surface characteristics, physical properties, and curatorial processing is summarized and referenced as far as it is known up to early 1992. The intention has been to be comprehensive: to include all published studies of any kind that provide information on the sample, as well as some unpublished information. References which are primarily bulk interpretations of existing data or mere lists of samples are not generally included. Foreign language journals were not scrutinized, but little data appears to have been published only in such journals. We have attempted to be consistent in format across all of the volumes, and have used a common reference list that appears in all volumes. Where possible, ages based on Sr and Ar isotopes have been recalculated using the 'new' decay constants recommended by Steiger and Jager; however, in many of the reproduced diagrams the ages correspond with the 'old' decay constants. In this volume, mg' or Mg' = atomic Mg/(Mg +Fe).

Ryder, Graham

1993-01-01

146

Drilling constraints on lithospheric accretion and evolution at Atlantis Massif, Mid-Atlantic Ridge 30°N  

NASA Astrophysics Data System (ADS)

Expeditions 304 and 305 of the Integrated Ocean Drilling Program cored and logged a 1.4 km section of the domal core of Atlantis Massif. Postdrilling research results summarized here constrain the structure and lithology of the Central Dome of this oceanic core complex. The dominantly gabbroic sequence recovered contrasts with predrilling predictions; application of the ground truth in subsequent geophysical processing has produced self-consistent models for the Central Dome. The presence of many thin interfingered petrologic units indicates that the intrusions forming the domal core were emplaced over a minimum of 100-220 kyr, and not as a single magma pulse. Isotopic and mineralogical alteration is intense in the upper 100 m but decreases in intensity with depth. Below 800 m, alteration is restricted to narrow zones surrounding faults, veins, igneous contacts, and to an interval of locally intense serpentinization in olivine-rich troctolite. Hydration of the lithosphere occurred over the complete range of temperature conditions from granulite to zeolite facies, but was predominantly in the amphibolite and greenschist range. Deformation of the sequence was remarkably localized, despite paleomagnetic indications that the dome has undergone at least 45° rotation, presumably during unroofing via detachment faulting. Both the deformation pattern and the lithology contrast with what is known from seafloor studies on the adjacent Southern Ridge of the massif. There, the detachment capping the domal core deformed a 100 m thick zone and serpentinized peridotite comprises ˜70% of recovered samples. We develop a working model of the evolution of Atlantis Massif over the past 2 Myr, outlining several stages that could explain the observed similarities and differences between the Central Dome and the Southern Ridge.

Blackman, D. K.; Ildefonse, B.; John, B. E.; Ohara, Y.; Miller, D. J.; Abe, N.; Abratis, M.; Andal, E. S.; Andreani, M.; Awaji, S.; Beard, J. S.; Brunelli, D.; Charney, A. B.; Christie, D. M.; Collins, J.; Delacour, A. G.; Delius, H.; Drouin, M.; Einaudi, F.; EscartíN, J.; Frost, B. R.; Früh-Green, G.; Fryer, P. B.; Gee, J. S.; Godard, M.; Grimes, C. B.; Halfpenny, A.; Hansen, H.-E.; Harris, A. C.; Tamura, A.; Hayman, N. W.; Hellebrand, E.; Hirose, T.; Hirth, J. G.; Ishimaru, S.; Johnson, K. T. M.; Karner, G. D.; Linek, M.; MacLeod, C. J.; Maeda, J.; Mason, O. U.; McCaig, A. M.; Michibayashi, K.; Morris, A.; Nakagawa, T.; Nozaka, T.; Rosner, M.; Searle, R. C.; Suhr, G.; Tominaga, M.; von der Handt, A.; Yamasaki, T.; Zhao, X.

2011-07-01

147

Massif central: détermination et modélisation de l'atténuation des ondes P télésismiques  

NASA Astrophysics Data System (ADS)

Estimations of teleseismic P-wave attenuation beneath the French Massif Central allow two regions of strong attenuation to be identified, in the Devès-Velay and Cantal areas. These two abnormal regions of propagation are clearly correlated with lateral heterogeneities observed with the inversion of P-wave travel time residuals (Granet et al., 1995). Our thermomechanical modelisation shows that the thermal effect can explain only 8 % of the observed attenuation. Only the presence of fluids could explain the Q factor value lower than 100. The persistence of strong crustal perturbation shows that these two regions were key areas for the circulation of magmas in the crust during recent volcanic events.

Guilbert, Jocelyn; Poupinet, Georges; Kelner, Sylvie; Allemand, Pascal

1999-06-01

148

Alpine thermal and structural evolution of the highest external crystalline massif: The Mont Blanc  

NASA Astrophysics Data System (ADS)

The alpine structural evolution of the Mont Blanc, highest point of the Alps (4810 m), and of the surrounding area has been reexamined. The Mont Blanc and the Aiguilles Rouges external crystalline massifs are windows of Variscan basement within the Penninic and Helvetic nappes. New structural, 40Ar/39Ar, and fission track data combined with a compilation of earlier P-T estimates and geochronological data give constraints on the amount and timing of the Mont Blanc and Aiguilles Rouges massifs exhumation. Alpine exhumation of the Aiguilles Rouges was limited to the thickness of the overlying nappes (˜10 km), while rocks now outcropping in the Mont Blanc have been exhumed from 15 to 20 km depth. Uplift of the two massifs started ˜22 Myr ago, probably above an incipient thrust: the Alpine sole thrust. At ˜12 Ma, the NE-SW trending Mont Blanc shear zone (MBsz) initiated. It is a major steep reverse fault with a dextral component, whose existence has been overlooked by most authors, that brings the Mont Blanc above the Aiguilles Rouges. Total vertical throw on the MBsz is estimated to be between 4 and 8 km. Fission track data suggest that relative motion between the Aiguilles Rouges and the Mont Blanc stopped ˜4 Myr ago. Since that time, uplift of the Mont Blanc has mostly taken place along the Mont Blanc back thrust, a steep north dipping fault bounding the southern flank of the range. The "European roof" is located where the back thrust intersects the MBsz. Uplift of the Mont Blanc and Aiguilles Rouges occurred toward the end of motion on the Helvetic basal décollement (HBD) at the base of the Helvetic nappes but is coeval with the Jura thin-skinned belt. Northwestward thrusting and uplift of the external crystalline massifs above the Alpine sole thrust deformed the overlying Helvetic nappes and formed a backstop, inducing the formation of the Jura arc. In that part of the external Alps, ˜NW-SE shortening with minor dextral NE-SW motions appears to have been continuous from ˜22 Ma until at least ˜4 Ma but may be still active today. A sequential history of the alpine structural evolution of the units now outcropping NW of the Pennine thrust is proposed.

Leloup, P. H.; Arnaud, N.; Sobel, E. R.; Lacassin, R.

2005-08-01

149

The Geological ve Geochemical Evaluation of Albite Deposits in Menderes Massif (SW Turkey)  

NASA Astrophysics Data System (ADS)

Menderes Massif which is one of the main rock association in southwestern Turkey consists of a Pan-African basement considered as the core and the overlying Lower Paleozoic - Paleocene age cover series. Albite deposits take place not only in the center but also around the Menderes Massif, with the increase amount of quartz from center to rim. The main rock units of the massif consist highly metamorphosed gneiss and mica schist hosting the albite deposits which situated in the tectonic lines has direction of N-NE. Nearly 250 feldspar quarries are being operated in the region. Albites are generally contaminated by minerals containing iron and titanium (rutile, sphene, mica etc.). The origin of the undesired elements in the albite deposits are aimed to obtain whether they originated from primary formation conditions or late alternations (metamorphism and/or deformation). Preliminary studies were done on 75 samples of Armutludüzü albite deposit (Milas - Turkey) and geochemical composition of these samples are evaluated in point of undesired elements for albite's quality. Compared to pure albite which has %11,8 Na2O in composition, the Armutludüzü albite deposit has a mean value of % 10,18 Na2O and % 0,28 K2O with undesired % 0,06 Fe2O3 and % 0,18 TiO2 composition. By correlation of the geochemical data with geologic unit boundaries, it is obtained that Ti concentration becomes intense in the N40-45oE gneiss boundary and Fe concentration increases in the mica schist boundary. Titanium is the most important component of albite quality because of its negative effects on burning color and iron which is the other important component of albite quality is restrictive for albite usage in the glass industry. Samples which are taken from core rocks and albites are being prepared for U- Pb and K-Ar/Ar-Ar dating methods to compare K-Ar/Ar-Ar ages measured from the micas which gives the latest deformation age and U-Pb ages of gneiss and albites which gives the actual age of formation. As a result of these studies, it is aimed to find whether the formation of the albites is related with the latest deformation processes or not. Key words: albite quality, menderes massif, armutludüzü

Cansu, Zeynep; Emre, Hasan

2013-04-01

150

Altitude et géochimie des eaux de source, Nord-Ouest du Massif central, France  

NASA Astrophysics Data System (ADS)

In the northwestern Massif Central (France), groundwater chloride concentrations are inversely correlated with elevation, when nitrate-poor. This can be explained by an evolution of the ratio evapotranspiration/rainfall, or of the rainwater composition. Such a relationship may be used for the detection of denitrification phenomena in groundwaters, or nitrate assimilation in surface waters, or for the computation of evapotranspiration, using the chloride mass balance method. However, the main objective will be the selection of groundwaters free of any chloride-bearing contamination, in order to define the natural groundwater quality background. To cite this article: J. Barbier, C. R. Geoscience 337 (2005).

Barbier, Jean

2005-06-01

151

Deglaciation and post-glacial environmental evolution in the Western Massif of Picos de Europa  

NASA Astrophysics Data System (ADS)

This study examines the process of deglaciation of the Western Massif of Picos de Europa through field work, geomorphological mapping, sedimentary records and absolute datings of 14C. This massif has several peaks over 2,400 m a.s.l. (Peña Santa de Castilla, 2,596 m; Torre Santa María, 2,486 m; Torre del Mediu, 2,467 m). It is composed mainly by Carboniferous limestones. This area has been intensively affected by karstic dissolution, Quaternary glaciers and fluvio-torrential processes (Miotke, 1968; Moreno et al, 2010; Ruiz-Fernández et al, 2009; Ruiz-Fernández, 2013). At present day, periglacial processes are active at the highest elevations (Ruiz-Fernández, 2013). We have identified four main glacial stages regarding the deglaciation of the massif: (i) maximum advance corresponding to the Last Glaciation, (ii) retreat and stabilization after the maximum advance, (iii) Late Glacial, and (iv) Little Ice Age. Sedimentological studies also contribute data to the understanding of the chronological framework of these environmental changes. The datings of the bottom sediments in two long sequences (8 and 5.4 m) provided a minimum age of 18,075 ± 425 cal BP for the maximum advance stage and 11,150 ± 900 cal BP for retreat and stabilization in the phase following the maximum advance. The ongoing analyses of these sequences at very high resolution will provide new knowledge about the environmental conditions prevailing since the deglaciation of the massif. References Miotke, F.D. (1968). Karstmorphologische studien in der glazial-überformten Höhenstufe der Picos de Europa, Nordspanien. Hannover, Selbtverlag der Geografischen Gessellschaft, 161 pp. Moreno, A., Valero, B.L., Jiménez, M., Domínguez, M.J., Mata, M.P., Navas, A., González, P., Stoll, H., Farias, P., Morellón, M., Corella, J.P. & Rico, M. (2010). The last deglaciation in the Picos de Europa National Park (Cantabrian Mountains, Northern Spain). Journal of Quaternary Science, 25 (7), 1076-1091. Ruiz-Fernández, J. (2013). Las formas de modelado glaciar, periglaciar y fluviotorrencial del Macizo Occidental de los Picos de Europa (Cordillera Cantábrica). Unpublished PhD Thesis, University of Oviedo, 314 pp. Ruiz-Fernández, J., Poblete. M.A., Serrano, P., Martí, C. & García-Ruiz, J.M. (2009). Morphometry of glacial cirques in the Cantabrian Range (Northwest Spain). Zeitschrift für Geomorphologie N. F., 53, 47-68.

Ruiz-Fernández, Jesús; Oliva, Marc; García, Cristina; López-Sáez, José Antonio; Gallinar, David; Geraldes, Miguel

2014-05-01

152

Degassing and redox effects in the magma chamber of the Guli massif (Polar Siberia)  

NASA Astrophysics Data System (ADS)

The Guli massif occupies a large area between the Maymecha and Kotui Rivers at the boundary of the Siberian platform with the Khatanga trough. It has a roughly oval shape of 35-45 km, and, including the two-thirds obscured by Quaternary deposits, has an area of 1500-1600 km2. The Guli massif, like many of the other alkaline-ultrabasic intrusions, is a composite, multi-stage pluton. The predominant rocks of the massif are dunites, which occupy about 60% of the total area, and a range of melanocratic alkaline rocks, which extend over about 30%. The other rock types, including melilitolite, ijolite, alkaline syenite and carbonatite, occupy less than 10% of the area. Dunite intrusives were cut by numerous bodies of Ti-Fe ore pyroxenite (kosvite) that are composed mainly of pyroxene and titanomagnetite with accessory apatite and titanite, and form about 10% of the volume of the dunites. Among the volcanics and dyke rocks in the area surrounding the Guli massif olvine-rich meimechites play substantial role. Variations of Mg# of olivines from dunite indicat presence of cryptic layering, whereas evolution of spinels from chromites to titanomagnetites in less magnesian varieties indicate gradual transition from dunites to kosvites. Original layering is obscured by intense folding. Trace-element diagram normalized to pyrolite and Lu shows that interstitial material present between olivines of dunites is identical to meimechites. This implies that primary magma of the Guli intrusion had meimechite composition. Some zoned olivines show regular decrease in Ni and increase in Mn from core to margin, whereas variation of Ca content in the same grains pass through several maxima and minima. This reflects accumulation of both Ca and CO2 in the residual melt with episodic loss of CO2 leading to the increase in the activity of CaO. Eventually this process leads to the formation of melilite-bearing rocks, alkaline magmas and carbonatites. In many samples of kosvites Ni content in olivines correlates negatively with their Mg#'s. This is opposite to usual behaviour of Ni during the crystallization of olivine-bearing rocks. It may be explained by simultaneous crystallization of the large proportion of magnetite, which in turn indicates highly oxidized nature of this magmatic system. Magma chamber of the Guli intrusion was originally filled with meimechite magma. Its crystallization created huge pile of olivine-rich cumulates. Kosvites, melilite-bearing rocks, alkaline rocks and carbonatites are most likely to have been formed by the crystallization of filter-pressed melts derived from earlier cumulates. The variety of rocks within the Guli magmatic complex are basically result of in situ differentiation.

Ryabchikov, I. D.; Kogarko, L. N.; Kuzmin, D. V.

2012-04-01

153

Metamorphic and magmatic overprint of garnet pyroxenites from the Beni Bousera massif (northern Morocco): Petrography, mineral chemistry and thermobarometry  

NASA Astrophysics Data System (ADS)

A detailed mineralogical and textural study of two pyroxenites from the Beni Bousera massif, a garnet clinopyroxenite (GP) and a garnet clinopyroxenite containing graphite pseudomorphs after diamond (GGP), indicates a strong metamorphic overprint associated with the massif exhumation. In both pyroxenites, the primary assemblage [Cpx(I) + Gt(I) ± Opx] originally stable with diamond, records temperatures in excess of 1200 °C. Along the exhumation path, Cpx(I) has decomposed according to the reaction:CpxI=0.55-0.60CpxII+0.30-0.35OpxII+0.03-0.05GtII+0.03-0.5Pl.

El Atrassi, Fatima; Brunet, Fabrice; Chazot, Gilles; Bouybaouène, Mohamed; Chopin, Christian

2013-10-01

154

Utilization of digital LANDSAT imagery for the study of granitoid bodies in Rondonia: Case example of the Pedra Branca massif  

NASA Technical Reports Server (NTRS)

Analysis of digital multispectral MSS-LANDSAT images enhanced through computer techniques and enlarged to a video scale of 1:100.000, show the main geological and structura features of the Pedra Branca granitic massif in Rondonia. These are not observed in aerial photographs or adar images. Field work shows that LANDSAT photogeological units correspond to different facies of granitic rocks in the Pedra Branca massif. Even under the particular characteristics of Amazonia (Tropical Forest, deep weathering, and Quaternary sedimentary covers), an adequate utilization of orbital remote sensing images can be important tools for the orientation of field works.

Parada, N. D. J. (principal investigator); Almeidafilho, R.; Payolla, B. L.; Depinho, O. G.; Bettencourt, J. S.

1984-01-01

155

New species from the Galoka and Kalabenono massifs: two unknown and severely threatened mountainous areas in NW Madagascar  

PubMed Central

The Galoka mountain chain, comprising principally the Galoka and Kalabenono massifs, situated at the northern edge of the Sambirano Region in NW Madagascar is an area that was virtually unknown botanically. It was visited three times between 2005 and 2007 as part of a floristic inventory. Both massifs contain the last remaining primary forests in the Galoka chain, which extends parallel to the coastline from South of Ambilobe to North of Ambanja. Several new species have been discovered amongst the collections, eight of which are described here.

Callmander, Martin W.; Rakotovao, Charles; Razafitsalama, Jeremi; Phillipson, Peter B.; Buerki, Sven; Hong-Wa, Cynthia; Rakotoarivelo, Nivo; Andriambololonera, Sylvie; Koopman, Margaret M.; Johnson, David M.; Deroin, Thierry; Ravoahangy, Andriamandranto; Solo, Serge; Labat, Jean-Noel; Lowry, Porter P.

2011-01-01

156

The subduction and collision related middle Paleozoic metamorphic events in the SW of Gyeonggi Massif in South Korea and its meaning to the tectonics in Northeast Asia  

NASA Astrophysics Data System (ADS)

The South and North China (Sino-Korean) blocks collided during Triassic forming the Qinling-Dabie-Sulu collision belt which continues into the Hongseong-Odesan collision belt in Korean Peninsula. In the Qinling, the western part of the belt, middle Paleozoic metamorphic event was reported. This metamorphic event is related to the collision of Qaidam block with the Sino-Korean block before main collision between the South and North China blocks. The collision event uplifted the Sino-Korean block resulting widespread major disconformity from late Silurian to middle Carboniferous. Almost same major disconfirmity exists both in the northern and southern parts of Korean peninsula. The major disconformity in northern parts can be explained by considering northern Korean peninsula as a part of Sino-Korean block. However, it is difficult to explain the middle Paleozoic major disconformity in southern Korean peninsula because the area with the major disconformity was separated from the Sino-Korean block by the Hongseong-Odesan collision belt. Recently, middle Paleozoic geologic event is recognized by 413 - 347 Ma detrital zircons from the Triassic and late Paleozoic sedimentary rocks from the basins located within or near the Hongseong-Odesan collision belt. In this study we studied middle Paleozoic metamorphism in the Hongseong area, northern margin of the South China block. In the study area, mafic and ultramafic bodies occur as tectonic lenses. Two mafic bodies are studied. One collected from Backdong area and the other, from Kwangcheon area. The Backdong metabasites are tholeiitic and formed in the island arc tectonic setting. On the other hand, the Kwangcheon metabasites are calc-alkaline and formed in the within plate tectonic setting at ca. 760 Ma. The SHRIMP zircon ages dating indicate that the Baekdong metabasites were metamorphosed at ca. 406 ± 7 Ma. The metabasites had undergone Sambagawa type high-P/T metamorphism with peak metamorphic conditions of 670-680°C, 13-15kb. After peak metamorphism they retrograded into amphibolite facies condition (645-660°C, 7.5-7.7 kb). On the other hand, the metabasites in Kwangcheon area were metamorphosed at 381- 392 ± 7 Ma. They had undergone ultrahigh temperature (UHT) metamorphism. The peak metamorphic conditions are 880-1070°C, 13-19kb and then they were retrograded into first to granulite facies (720-910°C, 8-14kb) and then finally to amphibolites facies conditions (650-760°C, 6-8.3kb). These data suggests that there had been a subduction along the northern margin of the South China block at ca. 406 Ma and arc or micro-continent collision with the South China block occurred between 406 and 392 Ma. The UHT metamorphism may have caused by the slab break-off after continental collision. The collision may have uplifted South Korea resulting major disconformity between late Silurian to middle Carboniferous. However, the collision is not strong enough to uplift whole South China block and may have enough to uplift the eastern part of South China block.

Kim, T.; Oh, C.; Lee, S.

2009-12-01

157

Time series of the northeast Pacific  

NASA Astrophysics Data System (ADS)

In July 2006, the North Pacific Marine Science Organization (PICES) and Fisheries & Oceans Canada sponsored the symposium “Time Series of the Northeast Pacific: A symposium to mark the 50th anniversary of Line P”. The symposium, which celebrated 50 years of oceanography along Line P and at Ocean Station Papa (OSP), explored the scientific value of the Line P and other long oceanographic time series of the northeast Pacific (NEP). Overviews of the principal NEP time-series were presented, which facilitated regional comparisons and promoted interaction and exchange of information among investigators working in the NEP. More than 80 scientists from 8 countries attended the symposium. This introductory essay is a brief overview of the symposium and the 10 papers that were selected for this special issue of Progress in Oceanography.

Peña, M. Angelica; Bograd, Steven J.

2007-10-01

158

Structure and metamorphism of the Gran Paradiso massif, western Alps, Italy  

NASA Astrophysics Data System (ADS)

The pressure-temperature-time trajectory and structural history of high-pressure rocks presently exposed in the Gran Paradiso massif provide constraints on the processes that caused their thermal evolution and exhumation. High-pressure metamorphism of the rocks is found to have culminated at temperatures around 525 °C and pressures of 12 to 14 kbar. After high-pressure metamorphism, the rocks cooled during initial decompression, while undergoing top-to-the-west shear on chlorite-bearing shear bands and larger scale shear zones. Biotite-bearing shear bands and larger shear zones related to top-to-the-east deformation affected the Gran Paradiso massif during reheating to temperatures of around 550 °C at 6 to 7 kbar. Further exhumation occurred at relatively high temperatures. A potentially viable explanation of the observed stage of reheating before final cooling and exhumation is breakoff of a subducting slab in the upper mantle, allowing advective heat transfer to the base of the crust. Electronic supplementary material to this paper can be obtained by using the Springer LINK server located at http://dx.doi.org/10.1007/s00410-001-0357-6.

Brouwer, F. M.; Vissers, R. L. M.; Lamb, W. M.

2002-05-01

159

Geochemistry of basic dikes in the Lanzo massif (Western Alps): Petrogenetic and geodynamic implications  

NASA Astrophysics Data System (ADS)

The Alpine peridotite massif of Lanzo (Italy) contains three generations of basic dikes (gabbros and basalts). The older gabbros are plagioclase-rich mantle segregates while the younger gabbro dikes are cumulates very similar in chemical composition to recent oceanic gabbros and gabbros from ophiolitic complexes. They both were derived from the N-type mid-ocean ridge basalt (MORB) magmas which were progressively more depleted in incompatible elements and were probably generated during a dynamic melting of a rising mantle diapir. The basaltic dikes are the N-type MORB and closely resemble the Alpine-Apennine ophiolitic basalts. They were derived from a different upper mantle source than the parental magmas of the gabbros. The source of the basalts was less depleted in light REE. The presence of basic magmas with N-type MORB affinities in the Lanzo massif is consistent with the close genetic relationship between the Alpine peridotite body and the ophiolites of the Liguro-Piemontese basin.

Bodinier, J. L.; Guiraud, M.; Dupuy, C.; Dostal, J.

1986-08-01

160

Pyrolysis of Lignocellulosic Biomass from Northeast China  

Microsoft Academic Search

The pyrolytic decomposition study of four species of lignocellulosic biomass (pine, poplar, bass and birch) from the Northeast China was carried out by thermogravimetric analysis (TGA) under the temperature range from 30 to 800°C in the N2 atmosphere at four heating rates (??) of 10,20,40 and 60°C\\/min. The non-isothermal weight loss process of the above biomass samples was mainly composed

Xuefeng Bai; Wei Wu

2010-01-01

161

SNAKES USED IN ETHNOMEDICINE IN NORTHEAST BRAZIL  

Microsoft Academic Search

This paper documents zootherapeutic practices in Northeast Brazil. It is primarily based on field surveys carried out in fishing\\u000a villages located in the States of Maranh?o and Para?ba, where dwellers provided information on snake species used as medicine,\\u000a body parts used to prepare the remedies, and the illnesses to which the remedies were prescribed. The species used as medicinal\\u000a drug

RÔMULO ROMEU DA NÓBREGA ALVES; GENTIL ALVES PEREIRA FILHO; YURI CLÁUDIO CORDEIRO DE LIMA

2007-01-01

162

Cross-gradient joint inversion of gravity and aeromagnetic data in mineralized northern Menderes Massif, Turkey  

NASA Astrophysics Data System (ADS)

The Menderes Massif in western Turkey formed by the stacking of tectonic units during Cretaceous-Eocene shortening that were modified by late Oligocene to recent crustal extension, accompanied by significant crustal melting. The interaction of regional deformation with crustal melting and the emplacement of plutons and volcanic complexes during both contraction and extension across structures related to the Tethyan suture has resulted in epithermal and porphyry type gold mineralization that has taken place mainly in the northern and western parts of the Menderes Massif, and in ongoing structurally controlled hydrothermal activity across its entire extent. The northern Menderes Massif contains granitic intrusions, ophiolitic klippen, volcanics, metamorphic basement and Cenozoic sediments. Some of the plutons, such as the Egrigöz granite, have intruded into the footwall of an extensional shear zone, defining at least part of the granite-intruded basement as a Miocene metamorphic core complex with ophiolitic rocks of the Vardar-Izmir-Ankara zone in the hanging wall plate. Here we present results of cross-gradient joint inversions of gravity and magnetic data in the northern Menderes Massif along a series of cross-sections oriented N-S, E-W and ESE-WNW. The inversions were carried out to better define the subsurface geology and aid targeting hydrothermal mineralization. The results suggest that metamorphic rocks with low magnetization underlie wide areas in the centre and east of the study area. Dense rocks with low to intermediate magnetization often correlate with oceanic affinity rocks that extend to great depth in the west and southeast of the study area, but occur as thin sheets in the centre. Regions of low to intermediate magnetization and low density are mostly encountered with the upper 5 km of the crust and are often spatially associated with felsic volcanic complexes and sedimentary rocks. High magnetization and low density are generally associated with granitoid intrusions, and mainly occur in the west, north and southeast of the study area, where they locally extend to the base of the cross section at 10 km depth. The inversions allow tracing the tectonic boundary between the Menderes Massif and overlying accreted subduction complex rocks: crustal provinces with oceanic affinity occur predominantly in the west and the southeast of the sections. The Bornova flysch, and the Tavsanli and Afyon zones occur in thin sheets in the centre / east and make up the entire studied depth of the crust in the west. The boundary is a steep structure in the west, and a shallowly dipping structure in the centre of the area, where the Menderes basement is at shallow levels. Where the structure is shallow, the boundary is likely to be an extensional detachment fault. Metamorphic rocks, but more so ophiolitic rocks in the OC terrain are potential reductants for magmatic and hydrothermal fluids sourced from, or in equilibrium with felsic-intermediate volcanics and intrusions. The key control to mineralisation may be with which type of wall rock Miocene intrusions and volcanic complexes have interacted. Given that the subduction complexes consist to a large extent of ultramafic and meta-carbonate rocks, it is not surprising that most mineral occurrences are in oceanic affinity crust, which is more prospective because of (i) its potential to reduce magmatic fluids, (ii) its mechanical inhomogeneity which translates into a better potential to dilate under stress thus providing pathways to fluids and melts, and (iii) its position as the 'hanging wall trap' unit in the steep western zone and the shallow detachments in the central study area.

Gessner, Klaus; Gallardo, Luis; Wedin, Francis; Sener, Kerim

2014-05-01

163

A Paleozoic anorthosite massif related to rutile-bearing ilmenite ore deposits, south of the Polochic fault, Chiapas Massif Complex, Mexico  

NASA Astrophysics Data System (ADS)

The Chiapas Massif Complex in the southern Maya terrane is mostly composed of late Permian igneous and meta-igneous rocks. Within this complex in southern Mexico and in the adjacent San Marcos Department of Guatemala, south of the Polochic fault, several small outcrops (~10 km2) of a Phanerozoic andesine anorthosite massif were found following an E-W trend similar to the Polochic-Motagua Fault System. Such anorthosites are related to rutile-bearing ilmenite ore deposits and hornblendite-amphibolite bands (0.1-3 meters thick). The anorthosites show recrystallization and metamorphic retrogression (rutile with titanite rims), but no relicts of high-grade metamorphic minerals such as pyroxene or garnet have been found. In Acacoyagua, Chiapas, anorthosites are spatially related to oxide-apatite rich mafic rocks; in contrast, further to the west in Motozintla, they are related to monzonites. Zircons from these monzonites yield a Permian U-Pb age (271.2×1.4 Ma) by LA-MC-ICPMS. Primary mineral assemblage of the anorthosites include mostly medium to fine-grained plagioclase (>90%) with rutile and apatite as accessory minerals, occasionally with very low amounts of quartz. Massive Fe-Ti oxide lenses up to tens of meters in length and few meters thick are an ubiquitous constituent of these anorthosites and their mineralogy include ilmenite (with exsolution lamellae of Ti-magnetite), rutile, magnetite, clinochlore, ×spinel, ×apatite, ×zircon and srilankite (Ti2ZrO6, first finding of this phase in Mexico). Rutile occurs within the massive ilmenite in two morphological types: (1) fine-grained (5-40 ?m) rutile along ilmenite grain boundaries or fractures, and (2) coarse-grained rutile (<5 mm) as discrete grains, whereas magnetite and srilankite only appear as small grains along ilmenite boundaries. Zircon is present as discontinuously aligned small grains (10-40 ?m) forming rims around many rutile and ilmenite grains. Attempts to date zircon rims by U-Pb using LA-MC-ICPMS yielded unreliable results due to extremely low U concentrations (<4 ppm). Geochemical analyses revealed that the Chiapanecan anorthosites contain by average ~58% SiO2, ~25% Al2O3, ~7% CaO, ~6% Na2O, >1000 ppm Sr, and positive europium anomalies. The anorthosites probably represent the exhumed roots of a deep-seated and differentiated mafic body of late Permian age as part of the Chiapas batholith, apparently precluding major displacements across the Polochic fault.

Cisneros, A.; Ortega-Gutiérrez, F.; Weber, B.; Solari, L.; Schaaf, P. E.; Maldonado, R.

2013-12-01

164

Physicochemical parameters of the melts participating in the formation of chromite ore hosted in the Klyuchevsky ultramafic massif, the Central Urals, Russia  

NASA Astrophysics Data System (ADS)

The results of melt inclusion study are reported for chromites of the Klyuchevsky ultramafic massif, which is the most representative of all Ural ultramafic massifs localized beyond the Main Ural Fault Zone. The massif is composed of a dunite-harzburgite complex (tectonized mantle peridotite) and a dunite-wehrlite-clinopyroxenite-gabbro complex (layered portion of the ophiolitic section). The studied Kozlovsky chromite deposit is located in the southeastern part of the Klyuchevsky massif and hosted in serpentinized dunite as a series of lenticular bodies and layers up to 7-8 m thick largely composed of disseminated and locally developed massive ore. Melt inclusions have been detected in chromites of both ore types. The heated and then quenched into glass melt inclusions and host minerals were analyzed on a Camebax-Micro microprobe. The glasses of melt inclusions contain up to 1.06 wt % Na2O + K2O and correspond to melts of normal alkalinity. In SiO2 content (49-56 wt %), they fit basalt and basaltic andesite. The melt inclusions are compared with those from chromites of the Nurali massif in the southern Urals and the Karashat massif in southern Tuva. The physicochemical parameters of magmatic systems related to the formation of disseminated and massive chromite ores of the Klyuchevsky massif are different. The former are characterized by a wider temperature interval (1185-1120°C) in comparison with massive chromite ore (1160-1140°C).

Simonov, V. A.; Ivanov, K. S.; Smirnov, V. N.; Kovyazin, S. V.

2009-04-01

165

Genetic Implications of Two Different Ultramafic Rocks from Hongseong Area in the Southwestern Gyeonggi Massif, South Korea  

Microsoft Academic Search

Two distinct ultramafic bodies occur in Baekdong and Bibong in the Hongseong area within Gyeonggi massif of South Korea. The Hongseong area is now extensively documented as an extension of the Dabie-Sulu collision belt in China. The Baekdong ultramafic body has a NWW elongation direction. This elongation trend is similar to the general trend of the Dabie-Sulu collision belt. The

Jieun Seo; Seon Gyu Choi; Chang Whan Oh; Sung Won Kim; Suck Hwan Song

2005-01-01

166

The Dilemma and Solutions for the Conflicts between Equality and Excellence in the Massification of Higher Education in Taiwan  

ERIC Educational Resources Information Center

Equality and excellence are two core values underlying many educational endeavors; however, they are often in conflict and controversy. This article intends to examine the dilemma created by such controversies in the context of massification of higher education in Taiwan and attempt to provide solutions from both the theoretical and policy…

Hsiou-Huai, Wang

2012-01-01

167

The structural geometry, metamorphic and magmatic evolution of the Everest massif, High Himalaya of Nepal-South Tibet  

Microsoft Academic Search

This paper presents a new geological map together with cross-sections and lateral sections of the Everest massif. We combine field relations, structural geology, petrology, thermobarometry and geochronology to interpret the tectonic evolution of the Everest Himalaya. Lithospheric convergence of India and Asia since collision at c. 50 Ma. resulted in horizontal shortening, crustal thickening and regional metamorphism in the Himalaya

M. P. S EARLE; R. D. L AW; R. R. PA; D. J. WAT

168

The Toa Baja Drilling Project, Puerto Rico: Scientific drilling into a non-volcanic island arc massif  

SciTech Connect

The Toa Baja Drilling Project was a broad, interdisciplinary experiment to document the in situ geology and geophysics of a non-volcanic island arc massif. This overview provides a brief summary of oil exploration on Puerto Rico that lead up to the present investigation, and summarizes some of the problems addressed by drilling.

Larue, D.K. (Univ. of Puerto Rico, Mayaguez (Puerto Rico))

1991-03-01

169

Montane vegetation of the Mt. Field massif, Tasmania: a test of some hypotheses about properties of community patterns  

Microsoft Academic Search

direct gradient analysis was applied to the montane vegetation of the Mt. Field massif, Tasmania. Ecological response surface were constructed, describing the relationship between the mean % cover of each of 100 vascular plant species and two major environmental complex-gradients represented by soil drainage and altitude. The hypotheses tested were that: (1) the ecological responses of species are generally of

Peter R. Minchin

1989-01-01

170

Quantitative Geomorphology Study of Main Carbonate Massifs of Central and Southern Apennines (Italy) Based on a Digital Elevations Archive.  

National Technical Information Service (NTIS)

Thirty-one Apennines carbonate massifs were analyzed using the mean heights archive. The elevation data were obtained from the 1:25,000 scale topographic maps with a grid cell size of 7.5 arc sec longitude, and 10 deg latitude. The data were assembled as ...

M. Poscolieri G. Onorati

1988-01-01

171

Safety concept for hazards caused by ice avalanches from the Whymper hanging glacier in the Mont Blanc Massif  

Microsoft Academic Search

The Whymper glacier is a hanging glacier located on the south face of the Grandes Jorasses (Mont Blanc Massif, Italy). Combined snow and ice avalanches triggered by ice masses breaking off from the hanging glacier endanger the village of Planpincieux and its surroundings in the Val Ferret. In 1997, the SLF and the VAW developed the first safety concept for

Stefan Margreth; Jérome Faillettaz; Martin Funk; Marco Vagliasindi; Fabrizio Diotri; Massimo Broccolato

172

Crustal segments in the North Patagonian Massif, Patagonia: An integrated perspective based on Sm-Nd isotope systematics  

NASA Astrophysics Data System (ADS)

New insights on the Paleozoic evolution of the continental crust in the North Patagonian Massif are presented based on the analysis of Sm-Nd systematics. New evidence is presented to constrain tectonic models for the origin of Patagonia and its relations with the South American crustal blocks. Geologic, isotopic and tectonic characterization of the North Patagonian Massif and comparison of the Nd parameters lead us to conclude that: (1) The North Patagonian Massif is a crustal block with bulk crustal average ages between 2.1 and 1.6 Ga TDM (Nd) and (2) At least three metamorphic episodes could be identified in the Paleozoic rocks of the North Patagonian Massif. In the northeastern corner, Famatinian metamorphism is widely identified. However field and petrographic evidence indicate a Middle to Late Cambrian metamorphism pre-dating the emplacement of the ca. 475 Ma granitoids. In the southwestern area, are apparent 425-420 Ma (?) and 380-360 Ma metamorphic peaks. The latter episode might have resulted from the collision of the Antonia terrane; and (3) Early Paleozoic magmatism in the northeastern area is coeval with the Famatinian arc. Nd isotopic compositions reveal that Ordovician magmatism was associated with attenuated crust. On the southwestern border, the first magmatic recycling record is Devonian. Nd data shows a step by step melting of different levels of the continental crust in the Late Palaeozoic. Between 330 and 295 Ma magmatism was likely the product of a crustal source with an average 1.5 Ga TDM (Nd). Widespread magmatism represented by the 295-260 Ma granitoids involved a lower crustal mafic source, and continued with massive shallower-acid plutono volcanic complexes which might have recycled an upper crustal segment of the Proterozoic continental basement, resulting in a more felsic crust until the Triassic. (4) Sm-Nd parameters and detrital zircon age patterns of Early Paleozoic (meta)-sedimentary rocks from the North Patagonian Massif and those from the neighboring blocks, suggest crustal continuity between Eastern Sierras Pampeanas, southern Arequipa-Antofalla and the northeastern sector of the North Patagonian Massif by the Early Paleozoic. This evidence suggests that, at least, this corner of the North Patagonian Massif is not allochthonous to Gondwana. A Late Paleozoic frontal collision with the southwestern margin of Gondwana can be reconcilied in a para-autochthonous model including a rifting event from a similar or neighbouring position to its post-collision location. Possible Proterozoic or Early Paleozoic connections of the NPM with the Kalahari craton or the western Antartic blocks should be investigated.

Martínez Dopico, Carmen I.; López de Luchi, Mónica G.; Rapalini, Augusto E.; Kleinhanns, Ilka C.

2011-03-01

173

Active Faulting within the Atlantis Massif at 30°N Mid-Atlantic Ridge Located by an Ocean Bottom Seismograph Array  

NASA Astrophysics Data System (ADS)

The Atlantis Massif, located at the intersection of the Mid-Atlantic Ridge (MAR) spreading axis and the Atlantis transform fault at 30N, is an oceanic core complex. Slip along the detachment fault for the last 1.5-2 Ma has brought lower crust and mantle rocks to the seafloor and has led to one of the most striking topographic features on the MAR. Hydroacoustic data collected between 1999 and 2003 indicate seismicity at the top of the Atlantis Massif, mostly on the southeastern section; little seismic activity was hydroacoustically detected at the adjacent ridge axis. In 2005, five short-period ocean bottom seismometers (OBS) were deployed at the Atlantis Massif in a pilot experiment to determine if there was active faulting within the massif and if the seismicity rate within the massif was higher than that beneath the rift valley as suggested by the hydroacoustic data. The analysis of the first six months of OBS data indicates that the majority of seismicity is associated with normal faults beneath the spreading axis, and composed of a relatively constant background seismicity rate and two large aftershock sequences. The OBS array captured 5 teleseismic events with magnitudes between 4.0 and 4.5. The aftershock sequences, following two of the M 4 earthquakes are located in the axial valley close to the ridge-transform intersection. They make up more than half of the detected earthquakes. Omori's law of aftershock decay is clearly demonstrated by both aftershock sequences. In addition, the OBS data indicate active faulting within the Atlantis Massif. These events are located in the same region as the hydroacoustic seismicity suggesting that the hydroacoustically-derived locations could indeed represent earthquake epicenters. Analysis of a cluster of earthquakes on the 1500-m-high north-facing scarp of the South Ridge section of the massif indicates a normal fault with an orientation that is either ridge parallel or ridge perpendicular. Data analysis to date cannot discriminate between these two orientations. A possible explanation for the observed seismicity is the bending of the detachment footwall across and/or along the axis as it emerges from beneath the valley floor.

McGuire, J. J.; Smith, D. K.; Collins, J. A.

2011-12-01

174

Northeast Regional Cancer Institute's Cancer Surveillance and Risk Factor Program  

Microsoft Academic Search

OBJECTIVES;\\u000aThe Northeast Regional Cancer Institute is conducting a program of ongoing epidemiologic research to address cancer disparities in northeast Pennsylvania. Of particular concern are disparities in the incidence of, stage at diagnosis, and mortality from colorectal cancer. In northeast Pennsylvania, age-adjusted incidence and mortality rates for colorectal cancer are higher, and a significantly smaller proportion of new colorectal cancer

Lesko; Samuel M

2007-01-01

175

Thematic mapping of likely target areas for the occurence of cassiterite in the Serra do Mocambo (GO) granitic massifs using LANDSAT 2 digital imaging  

NASA Technical Reports Server (NTRS)

The applicability of LANDSAT/MSS images, enhanced by computer derived techniques, as essential tools in mineral research was investigated and the Serra do Mocambo granitic massif was used as illustration. Given the peculiar factors founded in this area, orbital imagery permitted the delineation of potential target areas of mineralization occurrences, associated to albitized/greisenized types. Follow up prospection for primary tin deposits in this granitic massif should be restricted to the delineated areas which are less than 5% of the total superficial area of the massif.

Almeidofilho, R. (principal investigator)

1984-01-01

176

Looking Northeast Along Hallway between Pellet Plant and Oxide Building, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Looking Northeast Along Hallway between Pellet Plant and Oxide Building, including Virgin Hopper Bins - Hematite Fuel Fabrication Facility, Pellet Plant, 3300 State Road P, Festus, Jefferson County, MO

177

VIEW OF NOS. 217 AND 219 WASHINGTON AVENUE LOOKING NORTHEAST, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW OF NOS. 217 AND 219 WASHINGTON AVENUE LOOKING NORTHEAST, SHOWING WEST FACADES - Apollo Iron & Steel Works, Company Housing, West of Washington & Lincoln Avenues, Vandergrift, Westmoreland County, PA

178

17. VIEW LOOKING NORTHEAST, SHOWING SORTING AND SHIPPING SHED WITH ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

17. VIEW LOOKING NORTHEAST, SHOWING SORTING AND SHIPPING SHED WITH SAWMILL BEHIND - Ichabod T. Williams & Sons Sawmill & Veneer Plant, Roosevelt Avenue at Carteret Avenue, Carteret, Middlesex County, NJ

179

21. Historic American Buildings Survey Stanley Schwartz, Photographer 1971 NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

21. Historic American Buildings Survey Stanley Schwartz, Photographer 1971 NORTHEAST VIEW OF EXAMINING ROOM, DOCTOR'S OFFICE - Governor John Hubbard House, 52 Winthrop Street, Hallowell, Kennebec County, ME

180

View of west elevation; camera facing northeast. Mare Island ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of west elevation; camera facing northeast. - Mare Island Naval Shipyard, Central Power Plant, California Avenue, norhtwest corner of California Avenue & Seventh Street, Vallejo, Solano County, CA

181

3. MAGAZINE P STAIRWAY ENCLOSURE, LOOKING NORTHEAST. NIKE Missile ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. MAGAZINE P STAIRWAY ENCLOSURE, LOOKING NORTHEAST. - NIKE Missile Base C-84, Underground Storage Magazines & Launcher-Loader Assemblies, Easternmost portion of launch area, Barrington, Cook County, IL

182

5. Hospital Point, northeast bulkhead (typical), view to northwest ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. Hospital Point, northeast bulkhead (typical), view to northwest - Portsmouth Naval Hospital, Bounded by Elizabeth River, Crawford Street, Portsmouth General Hospital, Parkview Avenue, & Scotts Creek, Portsmouth, Portsmouth, VA

183

4. Hospital Point, Saunders Monument, view to northeast Portsmouth ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. Hospital Point, Saunders Monument, view to northeast - Portsmouth Naval Hospital, Bounded by Elizabeth River, Crawford Street, Portsmouth General Hospital, Parkview Avenue, & Scotts Creek, Portsmouth, Portsmouth, VA

184

Perspective view of east entrance from northeast National Home ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Perspective view of east entrance from northeast - National Home for Disabled Volunteer Soldiers, Pacific Branch, Mental Health Building, 11301 Wilshire Boulevard, West Los Angeles, Los Angeles County, CA

185

VIEW OF CENTRAL INTERIOR SPACE, FACING NORTHEAST. Douglas Aircraft ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW OF CENTRAL INTERIOR SPACE, FACING NORTHEAST. - Douglas Aircraft Company Long Beach Plant, Aircraft Parts Shipping & Receiving Building, 3855 Lakewood Boulevard, Long Beach, Los Angeles County, CA

186

DETAIL VIEW OF SOUTH FRONT DOORS, FACING NORTHEAST. Douglas ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

DETAIL VIEW OF SOUTH FRONT DOORS, FACING NORTHEAST. - Douglas Aircraft Company Long Beach Plant, Aircraft Wing & Fuselage Assembly Building, 3855 Lakewood Boulevard, Long Beach, Los Angeles County, CA

187

View of northeast side, camera facing southwest Golden Gate ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of northeast side, camera facing southwest - Golden Gate International Exposition, Palace of Fine and Decorative Arts & Annex, California Avenue, Treasure Island, San Francisco, San Francisco County, CA

188

INTERIOR VIEW, ORIGINAL BRICK INTERIOR WALL, FACING NORTHEAST. Southern ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

INTERIOR VIEW, ORIGINAL BRICK INTERIOR WALL, FACING NORTHEAST. - Southern Branch of the National Home for Disabled Volunteer Soldiers, Building 72, Martin Luther King Jr. Boulevard, Hampton, Hampton, VA

189

Mantle anisotropy of the Bohemian Massif as seen by SKS-wave splitting  

NASA Astrophysics Data System (ADS)

The Bohemian Massif (BM) assembled during the collision of Laurasia (Laurentia-Baltica) and Gondwana as a part of the Armorican Terrane Assemblage. It represents the estern-most outcrop of the European Variscan belt. The detailed tomographic and seismic anisotropy research of the deep structure of the BM has proceeded in several passive seismic experiments: BOHEMA I (2001-2003), BOHEMA II (2004-2005), BOHEMA III (2005-2006), PASSEQ (2006-2008) and Eger Rift (2007-2011). During these periods, the whole massif was stepwise covered by networks of temporal short-period and broad-band stations that recorded large amount of data from teleseismic events. The inferences from seismic anisotropy image the Bohemian Massif as a mosaic of microplates with a rigid mantle lithosphere preserving a fossil olivine fabric. The mantle domains can be associated with the tectonic units recognized by geological studies: Saxothuringian (ST), Teplá-Barrandian (TB), Moldanubian (MB) and finally Moravian (M) and Silesian (S) parts of the MS Zone, overlying the Brunovistulian mantle lithosphere. In this contribution, we concetrate on the large-scale mantle anisotropy modelled from splitting of SKS waves and their particle motion (PM). An advantage of using PM analysis is its ability to employ even events with lower signal-to-noise ratio (SNR) that are otherwise not usable for splitting analysis. To improve results of splitting analysis of signals distorted by noise, we use stacking of individual splitting measurements from waves closely propagating through the mantle. Another way of improving our analysis is a stacking of individual splittings of a single event measured at nearby stations. On average, the fast shear waves are polarized in the E-W direction in the ST, MD, TB units, but exhibit different regional variations of the splitting parameters in dependence on back-azimuths. Thus, different lithosphere mantle fabrics in the ST, MD and TB units were modelled. Moreover, the ST unit can be divided in two parts differing by about 30° in the fast S polarization directions. The boundary correlates with the geologically mapped Saxonian Lineament. To the north of the BM, the fast S polarizations significantly change. Within the BM, mean azimuths of fast S polarizations calculated for opposite back-azimuths differ. This is one of indications of the directional dependence of shear-wave splitting due to wave propagation through an anisotropic medium with a generally inclined symmetry axis. Anisotropic models with inclined symmetry axes are consistent with results derived from modelling directional variations of P-wave residuals.

Vecsey, Ludek; Plomerova, Jaroslava; Babuska, Vladislav

2014-05-01

190

Seafloor acoustic imagery surrounding the Rainbow massif, Mid-Atlantic Ridge 36°N  

NASA Astrophysics Data System (ADS)

The MARINER (Mid-Atlantic Ridge INtegrated Experiments at Rainbow) seismic and geophysical mapping experiment was carried out in April-May 2013 and was designed to examine the relationship between tectonic rifting, heat/melt supply, and oceanic core complex formation at a non-transform offset (NTO) of the Mid-Atlantic Ridge (36°N) the site of the ultramafic-hosted Rainbow hydrothermal system. One component of this experiment was dense acoustic multibeam backscatter and bathymetry data collection. We present acoustic imagery of the seafloor extending across two segments of the Mid-Atlantic Ridge separated by the Rainbow NTO massif. The acoustic imagery provides a broad view of the character of the ridge system, emphasizing the strong variability of seafloor morphology, tectonics, and lava emplacement and reveals the general tectono-magmatic setting of the Rainbow massif. The amplitude data were collected via a hull-mounted multi-beam sonar system (Kongsberg EM-122) aboard the R/V Marcus G. Langseth. The multi-fold, multi-directional coverage of the amplitude data allows for a compilation of all data into a common grid, as is usually done for depth data. Corrections for amplitude loss and grazing angle, in combination with multiple data coverage averages out noisy data, local slope dependence, and removes along-track artifacts that tend to be endemic to sonar images. The benefit is a complete sonar image for the area that can be examined with little distortion due to artifacts, and whose features can be interpreted as being principally derived from the intrinsic reflectivity of the seafloor rather than from look-direction and local seafloor slope. The main features of the image include: (1) newer seafloor within the axial valleys with some discernible individual lava flows; (2) large and small fault scarps and possible fissure systems; (3) sediment-filled basins; (4) terrains composed nearly entirely of small volcanic cones; (5) volcanic ridges; (6) regions of shallow topography exhibiting low sedimentation. The Rainbow massif itself consists of a mixture of high and low backscatter amplitudes, reflective of a complex tectonic and sedimentation history.

Dunn, R. A.; Canales, J.; Sohn, R. A.; Kakone, E.

2013-12-01

191

Geothermobarometry of basaltic glasses from the Tamu Massif, Shatsky Rise oceanic plateau  

NASA Astrophysics Data System (ADS)

We present the results of a petrological study of core samples from Tamu Massif (Site U1347), recovered during the Shatsky Rise Integrated Ocean Drilling Program (IODP) Expedition 324. The basaltic glasses from Site U1347 are evolved tholeiitic basalts containing 5.2-6.8 wt% MgO, and are principally located within the compositional field of mid-ocean ridge basalts (MORBs) but they have systematically higher FeO, lower Al2O3, SiO2, and Na2O concentrations, and the CaO/Al2O3 ratios are among the highest known for MORBs. In this sense, glasses from Site U1347 more closely resemble basaltic magmas from the Ontong Java Plateau (OJP), although they still have lower SiO2 concentrations. In contrast to MORB and similar to OJP, our fractionation corrected values of Na2O and CaO/Al2O3 indicate more than 20% of partial melting of the mantle during the generation of the parental magmas of Tamu Massif. The water contents in the glasses, determined by midinfrared Fourier transform infrared (FTIR) spectroscopy, are MORB-like, and vary between 0.18 and 0.6 wt% H2O. The calculated pressure (P)-temperature (T) conditions at which the natural glasses represent cotectic olivine-plagioclase-clinopyroxene compositions range from 0.1 to 240 MPa and 1100 to 1150°C reflecting magma storage at shallow depth. The variation of the glass compositions and the modeled P-T conditions in correlation with the relative ages indicate that there were at least two different magmatic cycles characterized by variations in eruptive styles (massive flows or pillow lavas), chemical compositions, volatile contents, and preeruptive P-T conditions. Each magmatic cycle represents the progressive differentiation in course of polybaric crystallization after the injection of a more primitive magma batch. Magma crystallization and eruption episodes are followed by magmatic inactivity reflected in the core sequence by a sedimentary layer. Our data for Tamu Massif demonstrate that, similar to Ontong Java ocean Plateau, the crystallization beneath Shatsky Rise occurs at different crustal levels.

Husen, Anika; Almeev, Renat R.; Holtz, François; Koepke, Jürgen; Sano, Takashi; Mengel, Kurt

2013-10-01

192

Petrostructural evolution of the Beni Bousera peridotite massif (Rif belt, Morocco)  

NASA Astrophysics Data System (ADS)

Extension of continental lithosphere occurs in continental rifts, such as the East African, Baikal and Rio Grande rifts, and active convergent continental margins, such as in the Himalayas and the Alps. While the mechanisms of crustal thinning are increasingly understood, the processes governing the thinning of the lithospheric subcontinental mantle still remain barely constrained. Detailed structural and petrological mapping associated with a thorough microstructural study in the Beni Bousera orogenic peridotite (Rif Belt, N Morocco) allows constraining the tectono-metamorphic evolution produced by exhumation of the subcontinental lithospheric mantle in a lithospheric-scale shear zone. The Beni Bousera massif is composed by four tectono-metamorphic domains showing consistent kinematics, marked by a pervasive shallowly-dipping foliation bearing a NW-SE stretching lineation, which progressively rotates towards a N20-N30 trend in the NE, lowermost part of the massif. From top to bottom: garnet-spinel mylonites, Ariègite subfacies fine-grained porphyroclastic spinel peridotites, Ariègite-Seiland subfacies porphyroclastic- and Seiland subfacies coarse-porphyroclastic to coarse-granular spinel peridotites. Microstructures and crystal preferred orientations (CPO) in the four domains are consistent with deformation by dominant dislocation creep, but the continuous increase in average olivine grain size and decrease in the recrystallized volume fraction indicate decreasing work rates from top to bottom. The microstructures are consistent with the variation in synkinematic pressure and temperature conditions, which range from 900°C-2.0 GPa in grt-sp mylonites and 1150°C-1.8 GPa in the Seiland domain. The diffuse compositional layering as well as the microstructures and CPO in the Seiland domain suggest deformation in presence of melt. Gravitational instabilities due to local melt accumulation may account for the small areas bearing a vertical lineation in this domain. To account for the consistent kinematics and for the large temperature gradient (ca. 100degC/km) preserved in Beni Bousera, we propose that the massif records the functioning of a lithospheric mantle transtensional shear zone, arrested at a depth of 60 km. In this scenario, partial melting in the Ariègite-Seiland and Seiland domains results from decompression and does not require an exotic heat source.

Frets, E. C.; Tommasi, A.; Garrido, C. J.; Vauchez, A. R.; Mainprice, D.; Amri, I.; Targuisti, K.

2012-12-01

193

Heterogeneous Mantle Fabrics in the Red Hills Ultramafic Massif, South Island, New Zealand  

NASA Astrophysics Data System (ADS)

Field-based investigations of naturally deformed upper mantle section are critical for understanding the spatial scales of mantle heterogeneity. New geologic mapping in the Red Hills Ultramafic Massif, part of the Dun Mountain Ophiolite Belt (south island, New Zealand) confirms a complex history of overprinted domains with heterogeneous structural fabrics. We characterize the extent and style of structures in the along-strike continuation of three previously described structural domains (West-dipping, East-dipping, and Central fabric domains), as well as a newly defined "Motueka" fabric domain. The earliest two fabric domains in the Red Hills are the Central and Motueka Domains. The Central Domain is composed of north-dipping, banded harzburgite, dunite and minor lherzolite. It is overprinted by the younger East-dipping Domain to the east, and abruptly transitions into massive harzburgite to the north. The Motueka Domain is found along the eastern margin of the massif, and is dominated by massive harzburgite and harzburgite with a linear fabric that is subhorizontally plunging and east-west trending. Along the western margin of the Red Hills, a >3 km-thick domain (West-dipping Domain) of roughly 60% dunite and 40% harzburgite has boundaries and foliation oriented N10W/85°W. The intensity of fabric increases toward the west in this domain; concurrently, west-dipping foliations of variable dip rotate into parallelism with the domain boundary. We interpret this zone as a broad shear zone. Variably deformed, late-stage mafic and silicic dikes intrude parts of this shear zone, constraining shear zone activity to ca. 275-285 Ma (cf. Kimbrough et al., 1992). The East-dipping Domain postdates the Western shear zone and is oriented approximately N45E/30SE. Based on structural relationships, we suggest that this domain formed during subsequent strain localization within the adjacent harzburgite-rich rocks of the Central and Motueka Domains, and overprinted earlier fabrics in the dunite-rich rocks of the West-dipping Domain. The East-dipping Domain is truncated by the serpentinized Porter's Fault, a major late-stage normal fault striking N20E/60SE. Kinematic indicators on the Porter's Fault suggest oblique normal movement plunging 37° at 173°. Complex heterogeneous fabrics showing both gradual (West-dipping Domain) and abrupt (East-dipping Domain) localization of mantle deformation are present in the Red Hills. On the basis of previous geochemical work on other parts of the Dun Mountain Ophiolite Belt (Sivell and McCulloch, 2000) and the presence of syn-deformational silicic dikes, we tentatively assign an incipient supra-subduction zone setting during this stage of deformation in the Red Hills Ultramafic Massif.

Newman, J.; Stewart, E. D.; Toy, V. G.; Kruckenberg, S. C.; Tikoff, B.

2011-12-01

194

Pyroclastic chronology of the Sancy stratovolcano (Mont-Dore, French Massif Central): New high-precision 40Ar/39Ar constraints  

NASA Astrophysics Data System (ADS)

The Sancy (16 km2) is the youngest of the two stratovolcanoes that constitute the Mont-Dore Massif (Massif Central, France). The restricted number of high precision radio-isotopic ages currently limits our knowledge of the pyroclastic chronology of this edifice which is the source of many tephra layers detected in middle Pleistocene sequences in southeast Europe. To improve our knowledge of the building phases of this stratovolcano, we collected thirteen pyroclastic units covering the entire proximal record. We present 40Ar/39Ar single grain laser dating performed in the facility hosted at the LSCE (Gif-sur-Yvette, France). The 40Ar/39Ar ages range from 1101 ± 11 ka to 392 ± 7 ka (1? external). Four pyroclastic cycles lasting on average 100 ka were identified (C. I to C. IV). C. I corresponds to the earlier explosive phase between 1101 ka and 1000 ka and starts about 100 ka earlier than previously thought. The second pyroclastic cycle (C. II) is the main pyroclastic episode spanning from 818 to 685 ka. This cycle is constituted of a minimum of 8 major pyroclastic eruptions and includes a major event that corresponds to a large plinian eruption at 719 ± 10 ka (1? external) and recorded as a 1.4 m thick layer 60 km south-east of the Sancy volcano. The link between this large eruption and formation of a caldera stays however, hypothetical. The third pyroclastic cycle (C. III) found in the northeastern part of the Sancy (Mont-Dore valley) spanned from 642 to 537 ka. Finally, the youngest pyroclastic cycle (C. IV) starts at 392 ka and probably ends around 280 ka. The age versus geographic location of each pyroclastic cycle indicates three preferential directions of channeling of the pyroclastic events and/or collapse of the volcanic edifice: northwest to west (C. I), southeast (C. II) and finally north to northeast (C. III and IV). The new high precision 40Ar/39Ar age for the Queureuilh bas pyroclastic unit (642 ± 9 ka) is identical within error with the U/Pb age obtained by Cocherie et al. (2009) [Geochimica et Cosmochimica Acta, 73, 1095-1108] and suggests a short residence time of the magma in a shallow, short-lived, small magmatic chamber. Finally, the source of the t21d tephra layer found in the Piànico Séllere varved sequence (Northern Italy) is not the Rivaux pumice flow as proposed by Brauer et al. (2007) [Journal of Quaternary Science 22, 85-96] and neither one of the C. II pyroclastic units as suggested by Roulleau et al. (2009) [Quaternary International 204, 31-43]. Accordingly, the source for the t21d layer has yet to be found at Sancy or elsewhere.

Nomade, Sébastien; Scaillet, Stéphane; Pastre, Jean-François; Nehlig, Pierre

2012-05-01

195

Rock avalanches on a glacier and morainic complex in Haut Val Ferret (Mont Blanc Massif, Italy)  

NASA Astrophysics Data System (ADS)

Deposits in upper Val Ferret (Mont Blanc Massif, Italy) have been attributed to glacier advances and to a rock avalanche of 12 September AD 1717. We review evidence for the timing and mode of emplacement of the deposit, and present a new geomorphic interpretation and relative and absolute dating to show that the AD 1717 deposit is less extensive than previously thought. The landslide was deflected along one side of the valley floor, preserving older slope and morainic sediments along the other side. An earlier rock avalanche onto the Triolet Glacier occurred before AD 1000. The deposits of these landslides partly cover older moraine several kilometres downstream from the present glacier front, and have affected the glacier regimen and construction of its moraines. This study highlights the geomorphic impact of rock avalanches in glacierized high mountains.

Deline, Philip; Kirkbride, Martin P.

2009-01-01

196

Physical-Chemical Factors Affecting the Low Quality of Natural Water in the Khibiny Massif  

NASA Astrophysics Data System (ADS)

One peculiarity of the Khibiny Massif is its spatial location. Rising over 1000 m above the surrounding hilly land and thus obstructing the passage of air masses, it promotes condensation and accumulation of surface and underground water. Annual precipitation here amounts to 600-700 mm in the valleys and up to 1600 mm on mountainous plateaus. Using this water for drinking and household purposes is problematic due to excess Al and F concentrations and high pH values. Now it is known that in its profile, the Massif is represented by three hydrogeological subzones: the upper (aerated), medium and lower ones. The upper subzone spreads throughout the Massif and is affected by the local drainage network and climatic conditions. The medium subzone is permanently saturated with underground water flowing horizontally to sites of discharge at the level of local river valleys and lakes. The fissure-vein water in the lower subzone is confined to tectonic fractures and faults in the so far underexplored, deeper parts of the Massif. Being abundant, this water ascends under high pressure. At places, water has been observed spurting from as deep as 700 m, and even 960 m. In the latter case, the temperature of ascending water was higher than 18 centigrade (Hydrogeology of the USSR, V. 27, 1971). This work was undertaken to reveal the nature of the low quality of water in the Khibiny by using physical-chemical modeling (software package Selector, Chudnenko, 2010). Processes of surface and underground water formation in the Khibiny were examined within a physical-chemical model (PCM) of the "water-rock-atmosphere-hydrogen" system. In a multi-vessel model used, each vessel represented a geochemical level of the process interpreted as spatiotemporal data - ? (Karpov, 1981). The flow reactor consisted of 4 tanks. In the first tank, water of the Kuniok River (1000 L) interacted with atmosphere and an organic substance. The resulting solution proceeded to tanks 2-4 containing with underlying rocks (100g of each) to interact with them following the preset process level, the water-rock ratio being ? = 1.0; 0.8; 0.6; 0.2 at temperatures (5, 5, 3, 3 centigrade) and pressures (1, 2, 2, 3 bar), respectively. The model had been reliably verified in the aeration zone monitored in the course of the years 2001 and 2010. Analysis of the chemical composition of deeper water-bearing strata has required to increase the intensity of the water-rock interactions in tank 3 (from 0.2 to 0) and tank 4 (from 0 to -0.2) and simultaneously increase the temperature: (5, 10, 10 centigrade) in the third and (10, 18, 25 centigrade) in the fourth. At the value of ?= -0.2 in the temperature range of 18-25 centigrade, the component contents in tank 4 were observed to change (mg/l): Al (8.10-4 -1.10-3), HCO3- (67-69), Na (25-26,9), Cl (6-6,38), F(0.522-0.882) giving rise to new mineral phases, which agreed with the monitoring data of 1996-1997. The pH values in this case were close to 9. Our findings suggest that factors contributing to changing redox conditions, responsible for the formation of soda and abrupt increment of HCO3-, fluorine and aluminum concentrations, are time and temperature.

Mazukhina, Svetlana; Masloboev, Vladimir; Chudnenko, Konstantin; Maksimova, Viktoriia; Belkina, Natalia

2014-05-01

197

Permafrost detection in the headwalls of receding glaciers at the Dachstein Massif, Northern Calcareous Alps, Austria  

NASA Astrophysics Data System (ADS)

The Northern Calcareous Alps cover a large area of the Austrian Alps forming a boundary zone between the Alpine Foreland to the north and the crystalline Central Alps to the south. Generally, climate in this area is more maritime compared to the mountain ranges further south. Few small glaciers are to be found mostly on north-facing slopes. The Northern Calcareous Alps reach maximum elevations of about 3000 m asl. Some of highest summits are to be found are located in the Dachstein Massif reaching 2995 m asl (47° 28' 32? N, 13° 36' 23? E). Occurrence, thickness and thermal regime of permafrost at this mountain massif are widely unknown and knowledge is based on simulations only. In contrast, the glaciation changes at this mountain massif (e.g. Schladminger and Hallstätter glaciers) have been well documented for decades. Within the framework of the research project ROCKING ALPS - dealing with frost weathering and rockfall in alpine regions - knowledge of permafrost distribution in the headwalls surrounding the receding glaciers is substantial to understand rock decay. For this reason, several techniques have been applied in order to detect bedrock permafrost. During the winter of 2012 22 i-buttons (temperature sensors) were attached to rock walls with different orientations but at similar elevations (2600-2700 m asl). Most of these sites were later covered by an insulating winter snow cover therefore allowing the calculation of the base temperature of the winter snow cover (BTS). These BTS data have been used as a first indicator of permafrost presence. In selected rock walls of several mountains in the massif - Koppenkarstein (2863 m asl), Dirndln (2829 m asl) and Gjaidstein (2794 m asl) - additional 2D-geoelectric surveys (five ERT profiles with a length of 100 m and 2 m electrode spacing) were measured in summer 2013. The high resistivities (> 50.000 ohm.m) at about 1.5 m depth and deeper strongly suggest permafrost existence inside the bedrock at all sites. Interestingly, bedrock permafrost was also detected at an immediate glacier margin which has been ice-free for 2-3 decades at maximum. Possibly the glacier at this site was too thin to have a sufficient insulating effect on the rock and hence was cold-based in this position. Alternatively permafrost aggradation occurred rapidly in the few last decades at this site. A new and innovative method in geomorphology and permafrost research is the use of infrared photography. By using this method the gaps between the punctual temperature sensors and the profile lines of the geoelectric measurements can get closed. By using infrared photography it was possible to visualize patterns and amplitudes of the diurnal variations of the surface temperature. First results showed a faster and deeper cooling of the permafrost areas compared to non-permafrost rocks, which is in accordance with the BTS and ERT data.

Rode, Matthias; Gitschthaler, Christoph; Schnepfleitner, Harald; Kellerer-Pirklbauer, Andreas; Sass, Oliver

2014-05-01

198

Crystal structure of hydrogen-bearing vuonnemite from the Lovozero alkaline massif  

SciTech Connect

Hydrogen-bearing vuonnemite from the Shkatulka hyperagpaitic pegmatite (the Lovozero alkaline massif, Kola Peninsula) was studied by single-crystal X-ray diffraction. The triclinic unit-cell parameters are as follows: a = 5.4712(1) Angstrom-Sign , b = 7.1626(1) Angstrom-Sign , c = 14.3702(3) Angstrom-Sign , {alpha} = 92.623(2) Degree-Sign , {beta} = 95.135(1) Degree-Sign , {gamma} = 90.440(1) Degree-Sign , sp. gr. P1, R = 3.4%. The Na{sup +} cations and H{sub 2}O molecules are ordered in sites between the packets. The water molecules are hydrogen bonded to the PO{sub 4} tetrahedra.

Rastsvetaeva, R. K., E-mail: rast@ns.crys.ras.ru; Aksenov, S. M.; Verin, I. A. [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation); Lykova, I. S. [Moscow State University (Russian Federation)

2011-05-15

199

Permeability Structure Beneath the Lost City Hydrothermal Field, Atlantis Massif Oceanic Core Complex  

NASA Astrophysics Data System (ADS)

The Lost City Hydrothermal Field (LCHF) has been venting low temperature (50-90 °C) alkaline fluids for at least 120,000 years. It is located close to the crest of the transform wall of the Atlantis Massif (30 °N, MAR), and is underlain by detachment fault schists and serpentinized peridotites with minor gabbro. Only 5km to the north, IODP Hole 1309D sampled 1400 m of gabbroic rocks. An almost linear thermal gradient of ~100 °C/km has recently been measured in the Hole during IODP expedition 340T, a unique piece of data in young ocean crust. The combination of a steep conductive gradient in proximity to a long lived hydrothermal system places severe constraints on the permeability structure of the Massif. We have used Comsol Multiphysics to create the first 2-D topographic model of the LCHF using a N-S profile through the vent site and Hole 1309D. Initial models use a constant basal heat flow (0.2 W/m2) which produces a steady state conductive gradient of about 85 °C/km using temperature-dependent conductivity and heat capacity. We include a low permeability basal layer and in some models a lower permeability zone beneath the IODP Hole with a boundary dipping steeply southwards, corresponding to a boundary between gabbro and serpentinite inferred from seismic tomography. We have used two top boundary conditions; (1) a mixed boundary condition in which dT/dz =0 if flow is upwards, and T=0 if flow is downwards, and (2) T=0. The first boundary condition is normally used in hydrothermal modelling but produces serious vent temperature artifacts at low upward flow rates since heat cannot escape conductively. The second boundary condition produces more stable models and has been shown by Wilcock (1998) to reproduce the form of hydrothermal circulation accurately. However vent temperatures can only be approximated due to the upper thermal boundary layer produced. With a constant permeability in the upper part of the model, transient high temperature vents form near the highest point of the topography but migrate with time across the location of the borehole, where a conductive gradient is never established. Conditions in the Massif are much better reproduced by models with a lower permeability zone beneath the IODP borehole. This stabilises the vent location near the crest of the Massif, and creates a conductive gradient in the borehole which typically increases gradually with time up to about 400000 years. Transient high temperature venting (with unstable flow at permeabilities <10-15 m2) are succeeded by stable venting with gradually declining vent temperatures matching Lost City temperatures over significant time intervals. In all our models, seafloor topography strongly influences circulation with influx of fluid in the transform valley (where microbes could potentially live several km below the seafloor) and discharge in higher topography. The requirement of a particular permeability structure means that long-term vent sites similar to Lost City may be a relatively uncommon occurrence in the world's oceans.

McCaig, A. M.; Titarenko, S.

2012-12-01

200

Oxidation state of the lithospheric mantle beneath the Massif Central,France  

NASA Astrophysics Data System (ADS)

The Tertiary and Quaternary volcanism of the French Massif Central sampled the underlying subcontinental lithospheric mantle (SCLM) in the form of xenoliths over a wide geographic area of ~20.000km2. Such an extensive distribution of xenoliths provides an unique opportunity to investigate regional variations in mantle structure and composition. On the basis of textural and geochemical differences, Lenoir et al. (2000) and later Downes et al. (2003) identified two distinct domains in the SCLM lying north and south of latitude 45° 30' N, respectively. The northern domain is relatively refractory, but has experienced pervasive enrichment of LREE. The southern domain is generally more fertile, exhibiting depletion in LREE. A metasomatic overprint has developed to variable extents in many xenolith suites. The different histories of these two juxtaposed blocks of SCLM should also be reflected in their oxidation state, with local variations also to be expected due to metasomatic interactions. For example, if carbonate-melt metasomatism played a role in the LREE enrichment of the northern domain (Lenoir et al. 2000; Downes et al. 2003), then such mantle should be relatively oxidised. Since surprisingly little redox data are currently available, we are undertaking a study to determine the oxidation state of the SCLM beneath the Massif Central over the largest geographical area possible. All xenoliths investigated are spinel peridotites, mostly with protogranular textures (although some samples are porphyroclastic or equigranular). Most samples are nominally anhydrous although minor amphibole is present in some xenolith suites. Major element compositions of the individual minerals were determined by microprobe. Two-pyroxene temperatures (BKN) range from 750° to ~1200° C. Ferric iron contents of spinel were determined by Mössbauer spectroscopy and gave a range of Fe3+/ Fetot from 0.191 to 0.418, with a conservative uncertainty of ±0.02. These data were used to calculate oxygen fugacity (fO2) of the peridotites using the Nell-Wood calibration for the equilibrium between olivine, orthopyroxene and spinel (Wood et al. 1990) and are referenced to the fayalite-magnetite-quartz (FMQ) redox buffer. Preliminary results yield ?log(fO2) values between FMQ-0.17 and FMQ+1.65 log units. In this fO2 range propagated uncertainties are on the order of 0.1 log units. Although there is some overlap, localities from the northern block tend to record higher values (>FMW+0.9). In the south, fO2values from a number of localities cluster around FMQ+0.3 to FMQ+0.6, with higher values associated with the occurrence of amphibole in the xenoliths. The higher values (>FMQ+1) testify to localised metasomatic interaction in the SCLM, possibly related to melt migration during earlier phases of magmatic activity in the region. This hypothesis is also consistent with lower fO2 values observed at one locality (Fraisse) on the northern block that is significantly older and thus sampled the mantle prior to the subsequent metasomatic activity in this block of SCLM. Downes H., Reichow M.K., Mason P.R.D., Beard A.D., Thirlwall M.F. (2003) Mantle domains in the lithosphere beneath the French Massif Central: trace element and isotopic evidence from mantle clinopyroxenes. Chem. Geol., 200, 71-87. Lenoir, X., Garrido, C.J., Bodinier, J.-L., Dautria, J.-M. (2000) Contrasting lithospheric mantle domains beneath the Massif Central (France) revealed by geochemistry of peridotite xenoliths. Earth Planet. Sci. Lett. 181, 359-375. Wood B.J., Bryndzia L.T., Johnson K.E. (1990) Mantle oxidation state and its relation to tectonic environment. Science, 248, 337-345.

Uenver-Thiele, L.; Woodland, A. B.; Downes, H.; Altherr, R.

2012-04-01

201

40 CFR 81.65 - Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality Control Region.  

Code of Federal Regulations, 2013 CFR

... Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality Control Region... Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality Control Region...The Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality...

2013-07-01

202

76 FR 1146 - Notice of Intent To Prepare an Environmental Assessment for the Proposed Northeast Supply...  

Federal Register 2010, 2011, 2012, 2013

...for the Proposed Northeast Supply Diversification Project and Ellisburg to Craigs Project...DTI). TGP's Northeast Supply Diversification Project would involve construction...facilities. The Northeast Supply Diversification Project would provide TGP with...

2011-01-07

203

77 FR 55265 - Environmental Impact Statement for the Northeast Corridor Between Washington, DC, New York, NY...  

Federal Register 2010, 2011, 2012, 2013

...Environmental Impact Statement for the Northeast Corridor Between Washington, DC, New...environmental evaluation of the Northeast Corridor (NEC) in close coordination with the involved states, Northeast Corridor Infrastructure and...

2012-09-07

204

77 FR 58439 - Environmental Impact Statement for the Northeast Corridor Between Washington, DC, New York, NY...  

Federal Register 2010, 2011, 2012, 2013

...Impact Statement for the Northeast Corridor Between Washington...FRA established the Northeast Corridor (NEC) Future Program to develop a Passenger Rail Corridor Investment Plan (PRCIP) for the Northeast region. The PRCIP...

2012-09-20

205

Cenozoic denudation of the Menderes Massif and its geodynamic framework: slab tear or not?  

NASA Astrophysics Data System (ADS)

Despite having experienced similar rates of convergence during the Alpine Orogeny, the Hellenides and Anatolides display fundamental differences in crust and mantle structure across a region that broadly coincides with the Aegean coastline of the Anatolian peninsula. The Menderes Massif experienced early Miocene tectonic denudation and surface uplift in the footwall of a north-directed extensional detachment system, followed by late Miocene to recent fragmentation by E-W and NW-SE trending graben systems, resulting in one of Earth's largest metamorphic core complexes. Based on the interpretation of geological and geophysical data we propose that the tectonic denudation of the Menderes Massif was caused by late Oligocene/early Miocene lithosphere scale transtension along the boundary of the Adriatic and Anatolian lithospheric domains, when rollback of the Aegean slab affected the Aegean-Menderes section of the Tethyan Orogen. In addition to previously hypothesized crustal discontinuities, gravity data, earthquake locations and seismic velocity anomalies highlight a north-south oriented boundary in the upper mantle between a fast slab below the Aegean and a slow asthenospheric region below western Turkey. As an alternative to the common interpretation of this discontinuity representing the western edge of a slab tear, we propose that the change in lithospheric structure is the result of how different lithosphere domains responded to roll-back: relatively slow removal of lithospheric mantle below western Anatolia versus trench retreat in the rapidly extending Aegean Sea region. Our findings highlight the significance of lateral variations in subduction-collision systems for the formation of continental plateaux and metamorphic core complexes.

Gessner, Klaus; Gallardo, Luis; Markwitz, Vanessa; Ring, Uwe; Thomson, Stuart

2014-05-01

206

A lichenometric growth curve in the French Alps: Ailefroide and Veneon valleys; Massif des Ecrins  

NASA Astrophysics Data System (ADS)

Today there is only one lichenometric curve in the French Alps for the Haute Ubaye valley. This study presents a growth curve constructed for Rhizocarpon subgenus Rhizocarpon of the Ailefroide and Veneon valleys, which are located in the Massif des Ecrins. In order to establish this curve, we used the modal values from tests carried out on the five largest lichens, the mean values of the five largest lichens and each single biggest lichen. The last two methods have been rejected for statistical and theoretical reasons. The 27 dated points on which the curve is based have a shared and homogeneous set-up on the period corresponding to the last 150 years. Fourteen points come from man-made structures and 13 from moraines. According to our results, two separate curves have been drawn corresponding to two climatic mountainous ranges: a low lichen factor (20.7 mm/100 years) for forest ranges and a mean lichen factor (28.47 mm/100 years) for alpine belts (above 2000 m a.s.l.). The differences in lichen growth rates are caused by methodological and environmental differences. In comparison with the two existing curves near the Massif des Ecrins, one in the Haute Ubaye and the other in the Val d'Aosta (Italian Alps), our lichen factors are very low. This may be due to the fine-grained texture of the local granites, low solar radiation and dry conditions during the summer. This variation in the lichen factor confirms the need to establish growth curves for each specific geographic and altitudinal range.

Pech, P.; Jomelli, V.; Baumgart-Kotarba, M.; Bravard, J. P.; Chardon, M.; Jacob, N.; Kedzia, S.; Kotarba, A.; Raczkowska, Z.; Tsao, C.

2003-11-01

207

Petrogenetic significance of ocellar camptonite dykes in the Ditr?u Alkaline Massif, Romania  

NASA Astrophysics Data System (ADS)

Camptonite dykes intrude the rift-related Mesozoic igneous body of the Ditr?u Alkaline Massif, Eastern Carpathians, Romania. We present and discuss mineral chemical data, major and trace elements, and the Nd isotopic compositions of the dykes in order to define their nature and origin. The dykes are classified as the clinopyroxene-bearing (camptonite-I) and clinopyroxene-free (camptonite-II) varieties. Camptonite-I consists of aluminian-ferroan diopside phenocrysts accompanied by kaersutite, subordinate Ti-rich annite, albite to oligoclase and abundant calcite-albite ocelli. Camptonite-II comprises K-rich hastingsite to magnesiohastingsite, Ti-rich annite, albite to andesine, abundant accessory titanite and apatite, and silicate ocelli filled mainly with plagioclase (An4-34). Age-corrected 143Nd/144Nd ratios vary from 0.51258 to 0.51269. The high ?Nd values of + 4.0 to + 6.1 which are consistent with intra-plate composition, together with light rare earth element (LREE), large ion lithophile element (LILE) and high field strength element (HFSE) enrichment in the camptonites is ascribed to the formation of small melt batches of a metasomatised sub-lithospheric mantle source. The presence of an asthenospheric ‘high ?’ ocean island basalt (HIMU-OIB)-type mantle component in the source region has also been revealed. A 1-4% degree of partial melting of an enriched garnet lherzolite mantle source containing pargasitic amphibole followed by fractionation is inferred to have been involved in the generation of the camptonites. They are deduced to be parental melts to the Ditr?u Alkaline Massif.

Batki, Anikó; Pál-Molnár, Elemér; Dobosi, Gábor; Skelton, Alasdair

2014-07-01

208

Proterozoic massif anorthosites and related rocks in Labrador: the anorthosite-charnockite connection  

SciTech Connect

Massif anorthosites of Labrador are closely associated in space and time with voluminous, felsic, fayalite- and ferrous pyroxene-bearing igneous rocks. These include charnockites, monzonites, biotite-hornblende granites, and locally syenites. Igneous charnockites form major parts of some of the granitic complexes. In Mistastin batholith for example, charnockitic assemblages comprise about 35% of a total area of 6500 sq. km. Feldspar pairs and coexisting fayalite-opx-qtz in these rocks indicate P and T near 3.5 kb, 750/sup 0/C, assumed to represent near solidus equilibration. Diorites and monzonites intruded by charnockite have mesoperthites implying crystallization T>900/sup 0/C presumably recording earlier stages of crystallization. Oxide and silicate assemblages indicate redox conditions between FMQ and WM oxygen buffers and water pressures well below Ptotal. Younger biotite-hornblende granites and quartz syenites lack Ti-mt. but retain fayalite suggesting that magmatic crystallization was largely closed to water and oxygen. Initial Sr isotope ratios in charnockite-granite suites of central labrador support derivation of the magmas largely or entirely from crustal source rocks. Compositions of mafic silicates and plagioclase, associated Fe-Ti oxide concentrations, trace elements and Sr isotopes in massif anorthosites are in accord with the rocks being crystallization products of substantially fractionated, originally more mafic, mantle magmas. Close association of high temperature, water-poor, reduced crustal melts is consistent with a fusion process in which heat supply and oxygen buffering were controlled by fractional crystallization of a substantial body of mafic magma subjacent to continental crust.

Emslie, R.F.

1985-01-01

209

Homogeneous /sup 18/O enrichment of the Marcy Anorthosite Massif, Adirondack Mountains, New York  

SciTech Connect

The Marcy Anorthosite Massif in the Adirondack Mountains, New York, is a composite intrusion that was metamorphosed to granulite facies at approx. 1.1 Ga. The massif is dominantly anorthosite but ranges from anorthosite (1-10% mafics) to oxide-rich pyroxenite layers (up to 98% mafics). In the St Regis Quad (SRQ) systematic variations in the percentage of mafics (POM) roughly parallel the foliation and increase toward the contacts (Davis, 1971). In 47 SRQ samples studied the POM varies from 2-25%; garnet ranges from 0-11%, pyroxene from <1-16% and oxides from <1-8%. Percent phenocrysts varies between 1-80. The Port Kent-Westport Unit (PKW) and an associated hybrid unit show significantly greater textural variability. The POM Varies from 1-50%; garnet ranges from 0-18%, pyroxene from 0-15%, oxides from 0-3% and phenocrysts vary from 0-80%. A total of 28 unaltered plagioclase phenocrysts have been analyzed for delta/sup 18/O: in 13 SRQ samples delta/sup 18/O = 9.0-9.8 (x=9.4. sigma=0.2) and in 15 samples from the PKW and hybrid units values of delta/sup 18/O=8.5-10.5 (x=9.5.sigma0.5). No correlations exist between the modal parameters and delta/sup 18/O. The results from SRQ demonstrate an extreme homogeneity suggesting for the first time a pristine magmatic character which is supported by the virtual absence of metasedimentary inclusions. This contrasts with PKW where inclusions are common and delta/sup 18/O values are more heterogeneous. Further analyses will evaluate the possibility of an anomalous source region as a cause of the /sup 18/O enrichment in the anorthosite.

Morrison, J.; Valley, J.W.

1985-01-01

210

Petrology of low pressure granulites from the Lichtenberg and Sauwald zone, Bohemian Massif, Upper Austria  

NASA Astrophysics Data System (ADS)

The Bohemian Massif in Upper Austria exposes low pressure granulite facies rocks which belong to the Moldanubian Unit and were metamorphosed during the last stage of the Variscan orogeny. The investigated Lichtenberg (northwest of Linz) and Sauwald (south of the river Danube) zones comprise mainly paragneisses. However, most of these rocks underwent high degrees of melting forming meta- and diatexites ("Perlgneise"). Al-rich metapelites, which are suitable for precise PT and PT-path determinations, can be found in various localities throughout the whole unit. In this study samples from the cliffs along the Danube valley between Linz and Wilhering and from Werndorf (close to Schärding) were sampled and investigated petrographically in detail. Since garnets are rare and usually consumed by cordierite, a sample with unusual large garnets was of special interest. A chemical zoning profile across the diameter of the c. 1cm large garnet showed an elevated Ca-plateau (Xgrs=0.06) in the core which decreased discontinuously towards the rim to Xgrs=0.02. Almandine, pyrope and spessartine components do not show any pronounced zoning pattern. Most of the smaller garnet grains in other samples are also homogeneous in composition with a slight Xalm increase and Xprp decrease at the rims, typical for retrograde diffusional zoning. The migmatic gneisses and cordierite-garnet-sillimanite-granulites as well as mafic granulites were used for geothermobarometric calculations. Metamorphic conditions of around 770°C to 850°C and 0.5-0.6 GPa could be obtained, which are similar to the values obtained by Tropper et al. (2006). P. Tropper I. Deibl F. Finger R. Kaindl (2006). P-T-t evolution of spinel-cordierite-garnet gneisses from the Sauwald Zone (Southern Bohemian Massif, Upper Austria): is there evidence for two independent late-Variscan low-P / high-T events in the Moldanubian Unit? Int J Earth Sci (Geol Rundsch) (2006) 95: 1019-1037.

Sorger, Dominik; Daghighi, Donia; Simic, Katica; Hauzenberger, Christoph; Linner, Manfred; Fritz, Harald

2013-04-01

211

The cooling history and the depth of detachment faulting at the Atlantis Massif oceanic core complex  

NASA Astrophysics Data System (ADS)

Oceanic core complexes (OCCs) are domal exposures of oceanic crust and mantle interpreted to be denuded to the seafloor by large slip oceanic detachment faults. We combine previously reported U-Pb zircon crystallization ages with (U-Th)/He zircon thermochronometry and multicomponent magnetic remanence data to determine the cooling history of the footwall to the Atlantis Massif OCC (30°N, MAR) and help establish cooling rates, as well as depths of detachment faulting and gabbro emplacement. We present nine new (U-Th)/He zircon ages for samples from IODP Hole U1309D ranging from 40 to 1415 m below seafloor. These data paired with U-Pb zircon ages and magnetic remanence data constrain cooling rates of gabbroic rocks from the upper 800 m of the central dome at Atlantis Massif as 2895 (+1276/-1162) °C Myr-1 (from ˜780°C to ˜250°C); the lower 600 m of the borehole cooled more slowly at mean rates of ˜500 (+125/-102) °C Myr-1(from ˜780°C to present-day temperatures). Rocks from the uppermost part of the hole also reveal a brief period of slow cooling at rates of ˜300°C Myr-1, possibly due to hydrothermal circulation to ˜4 km depth through the detachment fault zone. Assuming a fault slip rate of 20 mm/yr (from U-Pb zircon ages of surface samples) and a rolling hinge model for the sub-surface fault geometry, we predict that the 780°C isotherm lies at ˜7 km below the axial valley floor, likely corresponding both to the depth at which the semi-brittle detachment fault roots and the probable upper limit of significant gabbro emplacement.

Schoolmeesters, Nicole; Cheadle, Michael J.; John, Barbara E.; Reiners, Peter W.; Gee, Jeffrey; Grimes, Craig B.

2012-10-01

212

NASA Northeast Regional Technology Transfer Center  

NASA Technical Reports Server (NTRS)

This report is a summary of the primary activities and metrics for the NASA Northeast Regional Technology Transfer Center, operated by the Center for Technology Commercialization, Inc. (CTC). This report covers the contract period January 1, 2000 - March 31, 2001. This report includes a summary of the overall CTC Metrics, a summary of the Major Outreach Events, an overview of the NASA Business Outreach Program, a summary of the Activities and Results of the Technology into the Zone program, and a Summary of the Major Activities and Initiatives performed by CTC in supporting this contract. Between January 1, 2000 and March 31, 2001, CTC has facilitated 10 license agreements, established 35 partnerships, provided assistance 517 times to companies, and performed 593 outreach activities including participation in 57 outreach events. CTC also assisted Goddard in executing a successful 'Technology into the Zone' program.' CTC is pleased to have performed this contract, and looks forward to continue providing their specialized services in support of the new 5 year RTTC Contract for the Northeast region.

Dunn, James P.

2001-01-01

213

Algorithm of Rock Burst Preparation Scenario Construction in Rock Massif under Explosion Influence using seismic Catalogue Data  

NASA Astrophysics Data System (ADS)

A new algorithm of seismological information processing of detailed mines catalogue with use kinematic and dynamical characteristics of deformation waves, which propagate with different velocities in the rock massif, which is under heavy influence of single blasts and technological explosions is developed. It is estimated that the waves, which propagate with the velocities from 10 to 1 m/hour are primary carrier of the energy in the massif and promote its releasing. Events, which occur in the massive with these waves with releasing energy less than 104 joules promote to the creep rebuilding of the massif. Events, which occur in the massive with these waves with releasing energy more, than 105 joules, can be used as rock burst precursory and it is recommend taking into account by changing of explosions in the indicated part of the massif. The whole absence of such events indicates the growing of the stress massif state in the mine as a whole. The received joined information from the seismic catalogue is very significant for forecasting of dangerous events in the rock mines. That algorithm can be used also for analyzing seismic natural events preparation. Key words: massif response, slow deformation waves, seismic mine catalogue, analyze of observed data, algorithm of seismological information processing. 1.Hachay O. A. The reflection of synergetic Features in the Response of geological Medium on outer Force Actions. / O. A. Hachay, O. Yu. Khachay, V. K. Klimko, O. Yu. Shipeev // Advances in heterogeneous Material Mechanics - Shanghai, China, 2011. -P. 361-366. 2.Hachay O. A. Construction of a State Evolution dynamical Model of a Rock Massive, which is in a regime of energetic Pumping. / O. A. Hachay, A. Yu. Khachay, O. Yu. Khachay // Geophysical Research abstracts. -2011, -Vol. 13, - EGU2011 - 1528. 3.Khachay O.A. Dynamical model for evolution of Rock Massive State as a Response on a Changing of Stress-Deformed State. / O. A. Hachay, A. Yu. Khachay, O. Yu. Khachay //Fractal analysis and Chaos in Geosciences, chapter 5./Edited by Sid-Ali Quadfeul. -In Tech,Croatia. 2012. -174p.

Hachay, Olga; Khachay, Oleg; Klimko, Valeriy; Shipeev, Oleg

2014-05-01

214

2. View of blast deflector fences along northeast side of ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. View of blast deflector fences along northeast side of the operational apron. View to northwest. - Offutt Air Force Base, Looking Glass Airborne Command Post, Blast Deflector Fences, Northeast & Southwest sides of Operational Apron, Project Looking Glass Historic District, Bellevue, Sarpy County, NE

215

2. VIEW OF NORTHEAST (GABLE END) AND SOUTHEAST SIDES FROM ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. VIEW OF NORTHEAST (GABLE END) AND SOUTHEAST SIDES FROM THE NORTHEAST. (BUILDING 111 VISIBLE ON LEFT; BUILDING 114 AT RIGHT.) INTERIOR OF BUILDING 113 TO THE SOUTHEAST.) - Fort McPherson, World War II Station Hospital, G. U. Treatment Unit Lavatory, Thorne & Hood Avenues, Atlanta, Fulton County, GA

216

1. ROCKET ENGINE TEST STAND, LOCATED IN THE NORTHEAST ¼ ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. ROCKET ENGINE TEST STAND, LOCATED IN THE NORTHEAST ¼ OF THE X-15 ENGINE TEST COMPLEX. Looking northeast. - Edwards Air Force Base, X-15 Engine Test Complex, Rocket Engine & Complete X-15 Vehicle Test Stands, Rogers Dry Lake, east of runway between North Base & South Base, Boron, Kern County, CA

217

Northeast Heating Fuel Market The, Assessment and Options  

EIA Publications

In response to the President's request, this study examineshow the distillate fuel oil market (and related energy markets) in the Northeast behaved in the winter of 1999-2000, explains the role played by residential,commercial, industrial, and electricity generation sectorconsumers in distillate fuel oil markets and describes how that role is influenced by the structure of the energy markets in the Northeast

Joan Heinkel

2000-05-01

218

16. View of northeast corner of East Ward Street and ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

16. View of northeast corner of East Ward Street and North McDonald Avenue, facing northeast. - Gaskin Avenue Neighborhood, Bounded by Dart Street to east, CSX Railroad to south, Pearl & Madison Avenues to west, & Wilson & Gordon Streets to north, Douglas, Coffee County, GA

219

2. Southeast end and northeast rear, building no. 528. View ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. Southeast end and northeast rear, building no. 528. View to west. - Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic Fluid Buildings, Northeast of Looking Glass Avenue at southwest side of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

220

3. Northeast rear and northwest end, building no. 528. View ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. Northeast rear and northwest end, building no. 528. View to south. - Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic Fluid Buildings, Northeast of Looking Glass Avenue at southwest side of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

221

5. Northeast rear and northwest end, building no. 529. View ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. Northeast rear and northwest end, building no. 529. View to south. - Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic Fluid Buildings, Northeast of Looking Glass Avenue at southwest side of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

222

REGIONAL OXIDANT MODELING OF THE NORTHEAST U.S.  

EPA Science Inventory

The occurrence of long range and interurban transport of ozone and/or ozone precursors across the Northeast U.S. has been documented by numerous field studies during the last ten years. The U.S. Environmental Protection Agency initiated the Northeast Corridor Regional Modeling Pr...

223

Credit BG. Northeast and northwest facades of Building 4496 (Security ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Credit BG. Northeast and northwest facades of Building 4496 (Security Facility) as seen when looking south (178°) from entrance to secured area. The Control Tower (Building 4500) appears in background. The Security Facility is part of the secured Building 4505 complex - Edwards Air Force Base, North Base, Security Facility, Northeast of A Street, Boron, Kern County, CA

224

3. NORTHEAST REAR, SHOWING CONCRETE ENCASEMENT FOR STAIRWAY LEADING FROM ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. NORTHEAST REAR, SHOWING CONCRETE ENCASEMENT FOR STAIRWAY LEADING FROM INSTRUMENT ROOM TO UNDERGROUND FIRING CONTROL ROOM. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Firing Control Building, Test Area 1-100, northeast end of Test Area 1-100 Road, Boron, Kern County, CA

225

2. SOUTHEAST SIDE AND NORTHEAST REAR. SHOP BUILDING IN DISTANCE. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. SOUTHEAST SIDE AND NORTHEAST REAR. SHOP BUILDING IN DISTANCE. NOTE CONCRETE PROTECTION SLAB FOR UNDERGROUND CONTROL ROOM AND ESCAPE HATCH ON GROUND AT RIGHT MIDDLE DISTANCE. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Firing Control Building, Test Area 1-100, northeast end of Test Area 1-100 Road, Boron, Kern County, CA

226

Interaction between tectonic and erosion processes on the morphogenesis of an Alpine valley: geological and geophysical investigations in the lower Romanche valley (Belledonne massif, western Alps)  

Microsoft Academic Search

In the Belledonne massif, the steep Paleozoic Belledonne Middle Fault (BMF) separates micaschists, displaying numerous landslides,\\u000a from amphibolites. The massif is incised by the lower Romanche river valley. When crossing the BMF, the valley widens into\\u000a a lozenge-shaped basin recently interpreted as an active pull-apart type structure associated with a major N110 striking Quaternary\\u000a fault. Multidisciplinary investigations were carried out

Olivier Le Roux; Stéphane Schwartz; Jean François Gamond; Denis Jongmans; Pierre Tricart; Michel Sebrier

2010-01-01

227

Thermal maturation of the Lower Palaeozoic strata in the southwestern margin of the Malopolska Massif, southern Poland: no evidence for Caledonian regional metamorphism  

Microsoft Academic Search

Conodont colour alteration index (CAI) values have been used for the assessment of the thermal history of Lower Palaeozoic\\u000a strata in the southwestern margin of the Malopolska Massif, along the contact with the Upper Silesian Massif. The CAI data\\u000a provide no evidence for a previously suggested greenschistgrade regional metamorphism in the Cracow-Myszkow zone during the\\u000a Caledonian epoch. Near Zarki, the

Z. Belka; A. Siewniak-Madej

1996-01-01

228

Geology of the Atlantis Massif (Mid-Atlantic Ridge, 30°?N): Implications for the evolution of an ultramafic oceanic core complex  

Microsoft Academic Search

The oceanic core complex comprising Atlantis Massif was formed within the past 1.5–2 Myr at the intersection of the Mid-Atlantic Ridge, 30°?N, and the Atlantis Transform Fault. The corrugated, striated central dome prominently displays morphologic and geophysical characteristics representative of an ultramafic core complex exposed via long-lived detachment faulting. Sparse volcanic features on the massif's central dome indicate that minor

Donna K. Blackman; Jeffrey A. Karson; Deborah S. Kelley; Johnson R. Cann; Gretchen L. Früh-Green; Jeffrey S. Gee; Stephen D. Hurst; Barbara E. John; Jennifer Morgan; Scott L. Nooner; D. Kent Ross; Timothy J. Schroeder; Elizabeth A. Williams

2002-01-01

229

Thermochronological record of long term faulting, burial and exhumation history in the Sudetes (Bohemian Massif, Central Europe): a multi-system thermochronological approach  

NASA Astrophysics Data System (ADS)

Reconstructing erosional and faulting history in the old crystalline basement terrains, with lacking or sparse post-tectonic geological records, is a challenging task where even radiometric data on the basement rocks need not to provide ultimate answers. NE part of the Bohemian Massif (known as the Sudetes) represents a classic example where numerous attempts to constrain denudation, faulting and relief formation on the Variscan basement, often based on incomplete lines of evidence, led to formulation of controversial models. In this study we aim to reconstruct the post-orogenic exhumation history of the Rychlebské hory Mts. in the eastern Sudetes and constrain paleo-activity along the Sudetic Marginal Fault (SMF) - one of the morphologically most prominent, but poorly understood features of Central Europe, forming a >140 km long escarpment separating the Sudetic Mountains from the foreland in the northeast. We do so by applying zircon (U-Th)/He (ZHe), apatite fission track (AFT) and apatite (U-Th)/He (AHe) dating methods to the basement samples from different fault-bounded blocks and sparsely preserved post-orogenic sedimentary samples. New thermochronological data reveals that in the Late Cretaceous at ~95-80 Ma, the Carboniferous-Permian basement blocks SW and NE of the SMF were buried to ~4-7 km and >6.5 km depths, respectively, by sediments of the Bohemian Cretaceous Basin System. This finding contradicts the traditional paleogeographic reconstructions suggesting exposure of large portions of the Sudetes for most of the Mesozoic-Cenozoic. During the burial, the SMF acted as a normal fault as documented by offset in ZHe ages across the fault. At 85-70 Ma, the basin was inverted, Cretaceous strata eroded and basement blocks were exhumed to the near-surface at exhumation rate of ~300 m/Ma as evidenced by Late Cretaceous-Paleocene AFT ages and thermal modelling results. There is no appreciable difference in AFT and AHe ages across the fault suggesting that the SMF acted as a reverse fault during the exhumation. In the Late Eocene-Oligocene, the basement was locally heated to <~70°C in a response to thermal activity related to opening of the Eger rift system and associated magmatism. No signal of Neogene or Quaternary thermal activity in the thermochronological data confirms that Late Cenozoic uplift and erosion of the basement blocks resulting in the present-day topography did not exceed ~1.5 kilometres in the study area. This study highlights the importance of mutli-system thermochronological applications and the critical role of post-tectonic sediments in reconstructing histories of old crystalline basement terrain. More details can be found in Danišík et al. (2012).

Št?pan?íková, P..; Danišík, M.; Evans, N. J.

2012-04-01

230

Isotope-geochemical Sm-Nd, ENd and TDM data of the layered paleoproterozoic PGE massif Monchetundra (Kola peninsula)  

NASA Astrophysics Data System (ADS)

Monchetundra massif is located in the central part of the Kola Peninsula and it is the south-eastern part of the Main Ridge Intrusion. The massif is subdivided into two up to five syngenetic zones by different researchers (Nazimova, Rayan, 2008, Nerovich et. al. 2009, Layered intrusions…p.1, 2004). According the isotope-geochronological and isotope-geochemical data it can identify at least four groups of rocks distinguishing by ages. The aim of this study is to identify the isotope-geochemical Sm-Nd (ENd and TDM) data of the mafic rocks of the massif Monchetundra. For the interpretation of these data it was selected 40 analyzes of rocks sampled during field works within Monchetundra massif in 2011-2012 and from the published data (Nerovich et. al., 2009, Bayanova et. al., 2010, Layered intrusions…p.2, 2004). The earliest group of rocks is dated by U-Pb zircon in 2521 ± 8 Ma (Bayanova et. al., 2010). It consist of metagabbroids of wide composition range from anorthosite up to gabbro, which also called «amphibole-plagioclase rocks» (Nerovich et. al., 2009) due to their strong metamorphic changes. These rocks are characterized by ENd values from -0.02 up to -2.23 (at the time of rocks formation) as well as mesoarchean and paleoarchean values of model ages. The second group of rocks is composed of medium- grained and coarse-grained mesocratic gabbronorites of trachytoid texture and their amphibolized varieties. The rocks of this group were dated in 2505 ± 6 Ma and 2501 ± 8 Ma (Layered intrusions…p.1., 2004). Values of ENd for these rocks vary from -1.70 up to +1.42, model ages correspond to the range from 2.7 up to 3.5 Ga. Leucocratic gabbronorites, gabbronorite-anorthosites of massive texture and their metamorphosed varieties with garnet and amphibole constitute the third group of Monchetundra massife rocks. The formation age of these rocks has been determined on zircon and baddeleyite by U-Pb method and it is 2471 ± 9 Ma, 2476 ± 17 Ma, 2456 ± 5 Ma and 2453 ± 4 Ma (Bayanova et. al., 2010, Mitrofanov et. al., 1993). Value of ENd for this group rocks vary from -3.38 to +2.08, and the values of the model ages range between 2.7 and 3.4 Ga. Dyke-shaped bodies of melanocratic troctolites are found within the southeastern slope of Monchetundra massif. These rocks are characterized by positive values of ENd varying from +2.01 to +3.28, and the values of model ages are close to 2.7 Ga. Gabbro-pegmatites occur at the upper part of the Monchtundra massif and are characterized by negative ENd values from -1.26 up to -0.63, and model ages of protolith range from 3.0 to 3.2 Ga. Isotope-geochemical Sm-Nd (ENd and TDM) data indicate the origining of gabbro massif from EM-1 mantle plume reservoir and this fact is confirmed by the ENd-ISr diagrams in accordance with published data (Bayanova et. al., 2009). The research is conducted with the financial support of RFBR 13-05-00493, OFI-M 13-05-12055, 14-05-93965 and 14-05-00484.

Kunakkuzin, Evgeniy; Borisenko, Elena; Serov, Pavel

2014-05-01

231

A MASSIF Effort To Determine The Mass-Luminosity Relation for Stars of Various Ages, Metallicities, and Evolution States  

NASA Technical Reports Server (NTRS)

The MASSIF (Masses and Stellar Systems with Interferometry) Team will use SIM to investigate the mass content of the Galaxy - from huge stars to barely glimmering brown dwarfs, and from hot white dwarfs to exotic black holes. We will target various samples of the Galactic population to determine and relate the fundamental characteristics of mass, luminosity, age, composition, and multiplicity - attributes that together yield an extensive understanding of the stars. Our samples will include distant clusters that span a factor of 5000 in age, and commonplace stars and substellar objects that lurk near the Sun. The principal goals of the MASSIF Key Project are to (1) define the mass-luminosity relation for main sequence stars in five fundamental clusters so that effects of age and metallicity can be mapped (Trapezium, TW Hydrae, Pleiades, Hyades, and M67), and (2) determine accurate masses for representative examples of nearly every type of star, stellar descendant or brown dwarf in the Galaxy.

Henry, Todd J.; Beedict, G. Fritz; Gies, Douglas R.; Golimowski, David A.; Ianna, Philip A.; Mason, Brian; McArthur, Barbara; Nelan, Edmund; Torres, Guillermo

2004-01-01

232

Foraminiferal and radiolarian biostratigraphy of the youngest (Late Albian through Late Cenomanian) sediments of the Tatra massif, Central Western Carpathians  

NASA Astrophysics Data System (ADS)

B?k, K. and B?k M. 2013. Foraminiferal and radiolarian biostratigraphy of the youngest (Late Albian through Late Cenomanian) sediments of the Tatra massif, Central Western Carpathians. Acta Geologica Polonica, 63 (2), 223-237. Warszawa. The foraminiferal and radiolarian biostratigraphy of selected sections of the Zabijak Formation, the youngest sediments of the Tatra massif (Central Western Carpathians), have been studied. Benthic foraminifers, mainly agglutinated species, occur abundantly and continuously throughout the studied succession, while planktic foraminifers are generally sparse. Five planktic and two benthic foraminiferal zones have been recognized. The marly part of the Zabijak Formation comprises the Pseudothalmanninella ticinensis (Upper Albian) through the Rotalipora cushmani (Upper Cenomanian) planktic foraminiferal zones, and the Haplophragmoides nonioninoides and Bulbobaculites problematicus benthic foraminiferal zones. The radiolarians were recognized exclusively in the Lower Cenomanian part of the formation.

B?k, Krzysztof; B?k, Marta

2013-06-01

233

Tectonic and metallogenic model for northeast Asia  

USGS Publications Warehouse

This document describes the digital files in this report that contains a tectonic and metallogenic model for Northeast Asia. The report also contains background materials. This tectonic and metallogenic model and other materials on this report are derived from (1) an extensive USGS Professional Paper, 1765, on the metallogenesis and tectonics of Northeast Asia that is available on the Internet at http://pubs.usgs.gov/pp/1765/; and (2) the Russian Far East parts of an extensive USGS Professional Paper, 1697, on the metallogenesis and tectonics of the Russian Far East, Alaska, and the Canadian Cordillera that is available on the Internet at http://pubs.usgs.gov/pp/pp1697/. The major purpose of the tectonic and metallogenic model is to provide, in movie format, a colorful summary of the complex geology, tectonics, and metallogenesis of the region. To accomplish this goal four steps were taken: (1) 13 time-stage diagrams, from the late Neoproterozoic (850 Ma) through the present (0 Ma), were adapted, generalized, and transformed into color static time-stage diagrams; (2) the 13 time-stage diagrams were placed in a computer morphing program to produce the model; (3) the model was examined and each diagram was successively adapted to preceding and subsequent diagrams to match the size and surface expression of major geologic units; and (4) the final version of the model was produced in successive iterations of steps 2 and 3. The tectonic and metallogenic model and associated materials in this report are derived from a project on the major mineral deposits, metallogenesis, and tectonics of the Northeast Asia and from a preceding project on the metallogenesis and tectonics of the Russian Far East, Alaska, and the Canadian Cordillera. Both projects provide critical information on bedrock geology and geophysics, tectonics, major metalliferous mineral resources, metallogenic patterns, and crustal origin and evolution of mineralizing systems for this region. The major scientific goals and benefits of the projects are to: (1) provide a comprehensive international data base on the mineral resources of the region that is the first extensive knowledge available in English; (2) provide major new interpretations of the origin and crustal evolution of mineralizing systems and their host rocks, thereby enabling enhanced, broad-scale tectonic reconstructions and interpretations; and (3) promote trade and scientific and technical exchanges between North America and eastern Asia.

Parfenov, Leonid M.; Nokleberg, Warren J.; Berzin, Nikolai A.; Badarch, Gombosuren; Dril, Sergy I., Gerel, Ochir; Goryachev, Nikolai A.; Khanchuk, Alexander I.; Kuz'min, Mikhail I., Obolenskiy, Alexander A.; Prokopiev, Andrei V.; Ratkin, Vladimir V., Rodionov, Sergey M.; Scotese, Christopher R.; Shpikerman, Vladimir I.; Timofeev, Vladimir F.; Tomurtogoo, Onongin, and Yan, Hongquan; Nokleberg, Warren J. (ed.)

2011-01-01

234

Preferred orientation of phyllosilicates as a control of magnetic fabric, example from easternmost Rheno-Hercynian Zone of Bohemian Massif  

Microsoft Academic Search

The easternmost section of the Rheno-Hercynian Zone of the Bohemian Massif is built up of the Lower Carboniferous flysch sediments. The sedimentary sequences were deformed during Variscan orogeny. The ductile deformation, indicated by magnetic fabric, gradually increases from the east to the west. The deformation took place under the low-grade metamorphic conditions and led to the origin of the N-S

M. Chadima; A. Günther

2003-01-01

235

The age of HP metamorphism in the Gran Paradiso Massif, Western Alps: A petrological and geochronological study of “silvery micaschists”  

NASA Astrophysics Data System (ADS)

We present a petrological and geochronological study of "silvery micaschists" that crop out in the northern side of the Gran Paradiso Massif, Western Alps, with the aim of constraining P-T conditions and age of the Alpine high-pressure metamorphism. The studied "silvery micaschists", which are the products of metasomatic alteration of granitoids along ductile shear zones, consist of Mg-chlorite, talc, chloritoid, minor phengite, and accessory minerals. Microstructural relationships indicate the following prograde sequence in the growth of U-Th bearing accessory minerals: florencite ? monazite ? allanite. Thermobarometric calculations indicate that the Mg-chlorite + talc + chloritoid + allanite peak assemblage was stable at P = 1.9-2.7 GPa and T = 515-600 °C, while monazite formed earlier at pressures over 2.0 GPa. SHRIMP dating of allanite yielded 33.7 ± 1.6 Ma, interpreted as the age of the high-pressure metamorphic peak. Prograde monazite yielded an age of 37.4 ± 0.9 Ma, implying a minimum duration of ˜ 2-4 Ma for the Alpine subduction event. Combining our ages with previous constraints, it can be concluded that the initial exhumation of the Gran Paradiso Massif occurred at a fast rate higher than 2 cm/year, and slowed down to ˜ 1 cm/year in the final stages. In a regional context, the new geochronological data align the subduction of the Gran Paradiso Massif with the other Internal Crystalline Massifs of the Western Alps. This supports a subduction model marked by alternating compressional events, related to the accretion of continental terranes, and extensional events, related to the episodic retreat of subduction zone hinges.

Gabudianu Radulescu, Ioan; Rubatto, Daniela; Gregory, Courtney; Compagnoni, Roberto

2009-06-01

236

Phanerozoic polyorogenic deformation in southern Jiuling Massif, northern South China block: Constraints from structural analysis and geochronology  

NASA Astrophysics Data System (ADS)

The structure of the Jiuling Massif has been investigated in order to delineate the polyorogenic deformation and discuss its geodynamic evolution and orogenic mechanisms. Detailed structural analysis indicates that the D1 event is characterized by top-to-the NNW ductile shearing with pervasive foliation, and mineral and stretching lineation developed in the entire region. Compared with the D1 deformation, D2 structures are localized in ductile shear zones with subvertical foliation and subhorizontal E–W trending lineation, indicating a dextral ductile shearing. The D3 event, marked by folds and thrusts mainly in a brittle domain, modified the D1 structures by asymmetrical folds. The dominant D4 structures are gravitational folds and normal faults, corresponding to a later extension. Our new geochronological data suggest that the D1 event occurred between 465 and 380 Ma with D2 dextral shearing at the end of this Early Paleozoic orogen, and the D3 event has been constrained at 245–215 Ma. The final uplift of the Jiuling Massif by the D4 event can be correlated with the Late Mesozoic extension across the eastern South China block. Along with previous studies in the South China block, the structural pattern of the Jiuling Massif elucidates the influence of the Early Paleozoic and Early Mesozoic intracontinental belts triggered by repeated reactivation of the Jiangshan–Shaoxing Fault. Combined with deformation to the south, the Early Paleozoic belt shows a positive flower pattern, with opposing kinematics, rooted in the Jiangshan–Shaoxing Fault. During the Early Mesozoic, a general intracontinental belt was developed with uniform kinematics in both the Jiuling Massif and the Xuefengshan Belt, possibly resulted from the far-field effect of the Triassic NW-directed Paleo-Pacific subduction.

Chu, Yang; Lin, Wei

2014-06-01

237

The origin and formation of metamorphic microdiamonds from the Kokchetav massif, Kazakhstan: a nitrogen and carbon isotopic study  

Microsoft Academic Search

This study reports ?13C, ?15N and N-content values for microdiamonds from ultrahigh-pressure metamorphic rocks of the Kokchetav massif in Kazakhstan. Both alluvial diamonds and in-situ diamonds from a garnet–clinopyroxene rock and a marble (i.e. a garnet–pyroxene dolomitic rock) were investigated. In-situ diamonds were analysed in batches, because of their small size (average 40 ?m), whereas the larger alluvial diamonds were

Pierre Cartigny; Katrien De Corte; Vladislav S Shatsky; Magali Ader; Paul De Paepe; Nikolay V Sobolev; Marc Javoy

2001-01-01

238

The Arequipa Massif of Peru: New SHRIMP and isotope constraints on a Paleoproterozoic inlier in the Grenvillian orogen  

NASA Astrophysics Data System (ADS)

The enigmatic Arequipa Massif of southwestern Peru is an outcrop of Andean basement that underwent Grenville-age metamorphism, and as such it is important for the better constraint of Laurentia-Amazonia ties in Rodinia reconstruction models. U-Pb SHRIMP zircon dating has yielded new evidence on the evolution of the Massif between Middle Paleoproterozoic and Early Paleozoic. The oldest rock-forming events occurred in major orogenic events between ca. 1.79 and 2.1 Ga (Orosirian to Rhyacian), involving early magmatism (1.89-2.1 Ga, presumably emplaced through partly Archaean continental crust), sedimentation of a thick sequence of terrigenous sediments, UHT metamorphism at ca. 1.87 Ga, and late felsic magmatism at ca. 1.79 Ga. The Atico sedimentary basin developed in the Late-Mesoproterozoic and detrital zircons were fed from a source area similar to the high-grade Paleoproterozoic basement, but also from an unknown source that provided Mesoproterozoic zircons of 1200-1600 Ma. The Grenville-age metamorphism was of low- P type; it both reworked the Paleoproterozoic rocks and also affected the Atico sedimentary rocks. Metamorphism was diachronous: ca. 1040 Ma in the Quilca and Camaná areas and in the San Juán Marcona domain, 940 ± 6 Ma in the Mollendo area, and between 1000 and 850 Ma in the Atico domain. These metamorphic domains are probably tectonically juxtaposed. Comparison with coeval Grenvillian processes in Laurentia and in southern Amazonia raises the possibility that Grenvillian metamorphism in the Arequipa Massif resulted from extension and not from collision. The Arequipa Massif experienced Ordovician-Silurian magmatism at ca. 465 Ma, including anorthosites formerly considered to be Grenvillian, and high-T metamorphism deep within the magmatic arc. Focused retrogression along shear zones or unconformities took place between 430 and 440 Ma.

Casquet, C.; Fanning, C. M.; Galindo, C.; Pankhurst, R. J.; Rapela, C. W.; Torres, P.

2010-01-01

239

Sr and Nd-isotope geochemistry of the Atlantis Massif (30°N, MAR): Implications for fluid fluxes and lithospheric heterogeneity  

Microsoft Academic Search

The Atlantis Massif (Mid-Atlantic Ridge, 30°N) is an oceanic core complex marked by distinct variations in crustal architecture, deformation and metamorphism over distances of at least 5 km. We report Sr and Nd isotope data and Rare Earth Element (REE) concentrations of gabbroic and ultramafic rocks drilled at the central dome (IODP Hole 1309D) and recovered by submersible from the southern

Adélie Delacour; Gretchen L. Früh-Green; Martin Frank; Marcus Gutjahr; Deborah S. Kelley

2008-01-01

240

The Central Iberian arc, an orocline centered in the Iberian Massif and some implications for the Variscan belt  

NASA Astrophysics Data System (ADS)

An arcuate structure, comparable in size with the Ibero-Armorican arc, is delineated by Variscan folds and magnetic anomalies in the Central Iberian Zone of the Iberian Massif. Called the Central Iberian arc, its sense of curvature is opposite to that of the Ibero-Armorican arc, and its core is occupied by the Galicia-Trás-os-Montes Zone of NW Iberia, which includes the Rheic suture. Other zones of the Iberian Massif are bent by the arc, but the Ossa-Morena and South Portuguese zones are not involved. The arc formed during the Late Carboniferous, at final stages of thermal relaxation and collapse, and an origin related with right-lateral ductile transpression at the scale of the Variscan belt is proposed. The Central Iberian arc explains the width of the Central Iberian Zone, clarifies the position of the allochthonous terranes of NW Iberia, and opens new perspectives for correlations with the rest of the Variscan belt, in particular, with the Armorican Massif, whose central zone represents the continuation of the southwest branch of the arc detached by strike-slip tectonics.

Martínez Catalán, José R.

2012-07-01

241

Collapse in a rock massif induced by lateral confinement loss: the case of Montegolf (Málaga, Spain)  

NASA Astrophysics Data System (ADS)

The use of computing codes allowing finite elements analysis is a very useful tool in detecting variations of the tensional state of rock massifs. Most of the codes used for ground modelling only allow 2D analysis. However, in the case of complex slope instabilities, it is necessary to consider the variation of resistant properties in a 3D model. This work presents an example in which 3D analysis carried out by finite elements methods becomes essential to understand the surface processes occurred in a urbanized rock massif (Montegolf, Malaga). The studied area is a small hill of elliptical shaped plan (300x200m plan). As a main peculiarity of this hill, it was intensively undergone to human activity in recent years. On September 11th, 2000, the collapse of an inner cavity (100m3 in volume) took place. The cavity proceeded from a mining abandoned 30 years before. The application of a 3D finite elements model showed that the highway slope digged in the Eastern face of the mount produced a change in the tensional state inside the mount. Vertical stresses shifted from compression to tension eliminating the vault effect. To define the geometry of the model, a survey of the existing contour map was carried out and conveniently transformed into ACIS format to be processed by ABAQUS (finite elements program). In the two-dimensional case an E-W section involving houses, highway and cavity was chosen. Mining hole was considered in the model, using a 10m-diameter sphere to represent the cavity. The performance of the natural materials was supposed to be elastic so Young modulus and Poisson's ratio were required. The ground strains due to collapse of the cavity and obtained by the finite elements model were accurately related to the mapping of cracks on the surface, the sinking of topographical landmarks (located on the top of the mountain) and the photographic analysis (captures before and after the collapse). Thus it is confirmed that the surface sliding which affected the residential house Montegolf was caused by the collapse of a cavity inside the mount. 3D models confirmed that the highway slope digged on the mount and the subsequent instabilities in that slope were the main conditioning factors of this collapse.

Azañón, J. M.; Puertas, E.; Ureña, C.; Gallego, R.; Romero-Gómez, F.

2012-04-01

242

Groundwater hydrodynamics of ancient fan deltas: The case of Sant Llorenç del Munt Massif (NE Spain)  

NASA Astrophysics Data System (ADS)

Hydrogeological models based on well-exposed mountain massifs permitt to constrain the geological factors affecting water circulation and water-rock interaction. Our study adresses the question of how sudden lateral rock changes (sedimentologic facies evolution) affect hydrodinamics in the case of ancient fan deltas. A robust model for the Sant Llorenç del Munt massif (Eocene, Barcelona province) has been defined after the integration of geology (stratigraphy, sedimentology, mapping and integration of subsurface data) and groundwater hydrology (pumping tests, major ions hydrochemistry and environmental isotopes). Ten lito-hidrostratigraphic units have been recognized, which correspond to different sedimentary environments and have a distinctive response to water circulation and water-rock interaction. A remarkable point of this case study is that the size of the whole sedimentary system is considered, i.e. the lateral expansion of flow (lateral permeability barriers) is fully contrained. In terms of hydrogeology, hydraulic conductivity due to fracturing provide poor aquifers in 4 rock types. 5 hydrochemical groups have been established which allow explaining the evolution of the flow throughout the fan delta. Together with isotopic and stratigraphic data the main recharge areas have been determined. Flow dynamics throughout the system combines both surface runoff and subsurface flow. In proximal alluvial conglomerates, groundwater runs both vertically (fractures) and horizontally (fractured and karstified levels). Some features that are generally overlooked in hydrogeological studies (such as conglomerate petrology) are crucial for fracturation and karstic development. Laterally, conglomerates evolve to impermeable mudstones with sandstones (alluvial fan fringe). However, some conglomerates prograding locally reach distal (marine) sediments and recharge the fractured delta front sandstones aquifers that are also refilled by runoff waters. The end sediments (prodelta marls) provide an ultimate permeability barrier of the system. In general, lithologies arrangement due to past fluctuating distribution of sediments (sedimentary architecture) are crucial in the vertical and horizontal location of the aquifers levels. Interestingly, our study based on ancient rocks can also be applied to present day systems. Original sediments with important primary porosity are later better cemented (lithified) into indurated rocks and then more fracturated. So that, it indicates that in current and ancient fan deltas, better aquifers levels develop in the same strata independently of the transmisivity origin (primary porosity or fracturation).

Anglés, Marc; Folch, Albet; Oms, Oriol; Maestro, Eudald; Mas-Pla, Josep

2014-05-01

243

Timing and tectonic history of UHP rocks from the Rhodope Massif, Bulgaria  

NASA Astrophysics Data System (ADS)

Microdiamond inclusions in garnet delineate the Rhodope Massif (RM) as a globally important UHP locality. To date there are 4 confirmed UHP localities across the RM, with UHP indicators being restricted to garnets from metapelites. All available protolith and metamorphic ages from the RM are based on accessory minerals such as zircon and monazite, which yield a disparate array of ages spanning from pre-Variscan to post-Alpine (Eocene) times. The best estimate for the timing of the UHP event is that it was associated with a subduction event during the Jurassic1. This study focuses on garnets from UHP metapelites from the Central Rhodope Mts., Bulgaria, in the vicinity of the town of Chepelare. It is the first to date directly the host of the UHP indicators in the region, eliminating the risks of interpretations based on inherited inclusions. Aggregates of garnets have been dated via Sm/Nd geochronology, following a rigorous sample preparation and partial dissolution process to remove the effect of REE rich inclusions that result in low Sm/Nd ratios. Aggregate garnet ages range between 91.5 ± 4.6 Ma and 70.3 ± 2.3 Ma, which correlates well with the age of magmatic activity seen across the region. These Late Cretaceous ages are significantly younger than the proposed Jurassic UHP metamorphic event, but correlate well with another proposed (U)HP event, based on U-Pb zircon dating2. Current tectonic models for the RM invoke either a protracted subduction cycle with a single, long lasting (>30Ma long) exhumation event, or a series of complex subduction -exhumation cycles preserved in multiple suture zones. We will attempt to link our new garnet Sm/Nd ages with the complex post-Jurassic tectonic evolution of the RM, and in particular add constraints to the much debated questions surrounding the nature of the exhumation of the UHP units and the evolution of the massif. 1Burg, J., 2011, Journal of the Virtual Explorer, 42, paper 1 2Liati, A.,et al., 2011,. In Dobrzhinetskaya, L. and Cuthbert, S.(Editors), Ultrahigh Pressure Metamorphism. Elsevier, London, pp. 295-324.

Collings, David; Savov, Ivan; Eccles, Kathryn; Baxter, Ethan; Harvey, Jason

2013-04-01

244

Link between surface temperature and documented rockfalls in the Mont Blanc massif rockwalls  

NASA Astrophysics Data System (ADS)

Recent studies show that rockfall activity has increased along the three past decades in high mountain areas, and permafrost degradation is regarded as the main triggering factor. 433 rockfalls affecting the steep rockwalls of the Mont Blanc massif have been inventoried and documented (time and precise location, topographical and geological settings, volume, conditions, etc.) from 2007 to 2011. With the aim of better understanding geomorphic processes, we address questions about the thermal state of the unstable rockwalls within this study area. A statistical model of the Mean Annual Rock Surface Temperature (MARST) for the 1961-1990 period has been implemented on a 4-m-resolution DEM of the Mont Blanc massif. The model runs with Potential Incoming Solar radiation (PISR) calculated with GIS tools and air temperature parameters computed from Chamonix Météo France's records. 87 rockfalls are located at the geographical margins of the DEM, where the PISR calculation doesn't take account of the surrounding hillshading and biased MARST simulation. Thus, only 346 rockfalls were kept and linked to a MARST value after data sorting. Preliminary results show that rockfalls occurred over a modelled MARST range of -6°C to 5°C. MARSTs ranging from -2.5°C to 2.5°C encompass about 60% of the rockfalls. The mean MARST value for the 346 rockfalls is of -0.9°C. Simulated warm permafrost areas (> -2°C) are therefore appearing as the most affected by instabilities. These first observations reinforce the hypothesis that permafrost degradation is likely the dominant triggering factor of these rockfalls. The 1961-1990 period is supposed to be representative of the conditions at depth that are not affected by the recent climate warming. This means that the here presented results are mainly valuable for rockfalls related to pluri-decadal signal. But they also suggest that MARST model is an interesting tool to explore the link between rockwall instability and permafrost state. Simulations at various time scales would allow more precise reconstruction of the bedrock temperature during each year of rockfalls. Model possibilities and the related outcomings will be also presented.

Magnin, Florence; Deline, Philip; Ravanel, Ludovic

2014-05-01

245

Crustal Structure in the Vicinity of IODP Hole U1309D, Atlantis Massif  

NASA Astrophysics Data System (ADS)

The Atlantis Massif oceanic core complex (OCC) was formed initially by faulting within the axial zone of the Mid-Atlantic Ridge at 30°N, followed by strain localization and unroofing along a detachment surface between 0.5-1.5 Ma. IODP Hole U1309D extends approximately 1.4 km into the Central dome of the Massif and sampled primarily gabbroic rocks. As a relatively deep hole, U1309D is an attractive target for addressing one of the long-term goals of ocean drilling: better integration of borehole geophysical and geologic sampling with surface seismic results. In addition, a number of high quality multichannel seismic (MCS) profiles pass close to the hole. In winter 2012, IODP Expedition 340T reentered U1309D and collected a vertical seismic profile (VSP) as well as high-quality sonic, resistivity, and temperature logs over the entire extent of the Hole. We will present a synthesis, comparing the seismic results from the reprocessing and waveform inversion of all MCS lines passing near Hole U1309D with the results from the new VSP and sonic logs. The waveform inversion results build upon earlier tomographic inversion of downward continued data (Henig et al, 2012) but exhibit significantly improved vertical and horizontal resolution, allowing better integration with the borehole data. Waveform inversion of the nearest flowline MCS profiles that crosses the Central dome just to the north indicates that the original upper surface of the gabbroic body drilled at Hole 1309D now lies just to the west of the hole. Imaging reveals a sharp, almost planar contact, that dips steeply at about 30°. Based upon seismic velocities and seafloor sampling and observations, the rocks on other side of the contact are most likely serpentinized peridotite but other lithologies cannot be ruled out (Henig et al,2012). Reprocessing of the reflection image contains few, if any, coherent reflections from within the core of the gabbroic body but there are reflections adjacent to the western contact and near the eastern edge of the body beneath the volcanic hanging wall in regions where the waveform inversion results show the largest velocity variation. The reflections along the western contact require more analysis but suggest that the fluid flow and alteration patterns within the deeper parts of U1309D could be significantly influenced by proximity to the edge of the gabbroic body.

Harding, A. J.; Arnulf, A. F.

2012-12-01

246

Scattering of teleseismic waves in the lower crust Observations in the Massif Central, France  

NASA Astrophysics Data System (ADS)

High-frequency coda signals consistently recorded by a temporary seismic network of 29 short-period stations during a 6-month survey in the French Massif Central are concordant with independent evidence for a heterogeneous lower crust obtained from wide-angle and near-vertical reflection experiments in the same region. The teleseismic recordings of 22 events have been analysed in record sections rather than as single station seismograms. Following the low-frequency (LF; 0.5-1.5 Hz) first P-arrival a high-frequency (HF) coda (2-4 Hz dominant frequency) extends over several seconds duration. The HF signals become clearly visible after bandpass filtering, but can also be identified in the original seismograms. In event sections the HF coda forms a consistent pattern of reverberations which is characterized by the following properties: (1) the duration is typically longer on the radial (4-15 s) than on the vertical (3-11 s) component; (2) the beginning of the HF coda, referred to the picked LF first P-arrivals varies between 0-2.5 s, with a dominance around 1.5-2 s; (3) the amplitude of the HF coda is about 3%-10% of the primary LF P-phase amplitude; (4) the signals are incoherent between neighbouring stations and over the network; (5) the HF coda arrives dominantly around the plane of incidence of the teleseismic wave in the first 2 s to maximum 4 s; afterwards a widening of the particle motion to an elliptical shape is observed, indicating arrivals off the sagittal plane. The data parameters (1) to (5) point to the conclusion that the HF signals are generated by a scattering process. Wide-angle and CDP-reflection experiments in the same region measured a similar reverberating coda pattern and located the origin also in the lower crust. These observations and the data parameters of the HF coda suggest that the HF teleseismic waves are scattered at heterogeneities in the lower crust in the Massif Central. In this contribution we mainly concentrate on the presentation of the teleseismic recordings and conclude with a preliminary structural model which contains randomly distributed scatterers in the lower crust.

Ritter, Joachim R. R.; Martin Mai, P.; Stoll, Gerald; Fuchs, Karl

1997-02-01

247

Late Carboniferous remagnetisation of Palaeozoic rocks in the NE Rhenish Massif, Germany  

NASA Astrophysics Data System (ADS)

During stepwise thermal and alternating field demagnetisation experiments on Devonian and Lower Carboniferous carbonate and clastic rocks from the north-eastern part of the Rhenish Massif, Germany, three components of magnetisation (A, B, C) are identified. Component A is a recent viscous overprint that parallels the local present day geomagnetic field. Component B is mainly observed from 260 up to 550 °C during thermal demagnetisation and is carried by magnetite. In two localities, where red siltstones and red carbonate rocks were sampled, component B is stable up to 670 °C, indicating the presence of hematite. Three clusters of in situ B directions can be identified, which are controlled by the tectonic position of the sampling areas. These are from NW to SE: the Remscheid anticline (RA), the Lüdenscheid syncline (LS) and the Attendorn and Wittgenstein synclines (AS/WS). Standard and inclination-only fold tests, using parametric resampling, yield optimal statistical parameters at increasing amounts of untilting ranging from 0% in the South up to 57% in the North of the NE Rhenish Massif. Despite the variations in optimal untilting, the resulting site mean directions of component B do not differ significantly in inclination. These results are interpreted to reflect the acquisition of magnetisation during progressive northward migration of the deformation front in Late Carboniferous times. The resulting palaeolatitudes (RA: 1°S +2°-3°; LS: 2°S +3°-2°; AS/WS: 1°S +3°-4°) are in good agreement with the predicted position of the sampling area in the Late Carboniferous, as derived from a published Apparent Polar Wander Path for Baltica and Laurentia. The unblocking temperature spectra and the synfolding nature of B yield strong evidence that chemical processes, possibly driven by fluid migration during orogenesis, caused this remagnetisation. A third component C was observed in zones of tight folding with steeply dipping to overturned bedding planes and is dominantly carried by hematite. The resulting palaeolatitude (27°N +10°-8°) suggest a Late Triassic to Early Jurassic age of component C, which is interpreted to be caused by either hematite-bearing post-Variscan mineralisation or oxidising fluids percolating from the weathering surface and penetrating zones of enhanced permeability in the Mesozoic.

Zwing, A.; Bachtadse, V.; Soffel, H. C.

248

Internal structure of the Aar Massif: What can we learn in terms of exploration for deep geothermal energy?  

NASA Astrophysics Data System (ADS)

The successful use of deep geothermal energy requires 3D flow paths, which allow an efficient heat exchange between the surrounding host rocks and the circulating fluids. Recent attempts to exploit this energy resource clearly demonstrate that the new technology is facing sever problems. Some major problems are related to the prediction of permeability, the 3D structure of the flow paths and the mechanical responses during elevated fluid pressures at depths of several kilometers. Although seemingly new in a technical perspective, nature is facing and solving similar problems since the beginning of the Alpine orogeny. Based on detailed studies in the Hasli Valley (Aar Massif) we can demonstrate that deformation and fluid flow are strongly localized along mechanical anisotropies (e.g. lithological variations, brittle and ductile faults). Some of them already evolved during Variscan and post-Variscan times. Interestingly, these inherited structures are reactivated over and over again during the Alpine orogeny. Their reactivation occurred at depths of ~13-15 km with elevated temperatures (400-475°C) and involved both ductile and brittle deformation processes. Brittle deformation in form of hydrofracking was always present due to the circulating fluids. It is this process, which was and still is responsible for seismic activity. With progressive uplift and exhumation of the Aar Massif, ductile deformation structures became replaced by brittle cataclasites and fault gouges during fault activity at shallower crustal levels. Existing hydrotest data from the Grimsel Test Site (Nagra's underground research laboratory) indicate that these brittle successors of the ductile shear zones are domains of enhanced recent fluid percolation. Note that although being exposed today, the continuation of these fault structures are still active at depth in both brittle and ductile deformation modes, a fact that can be inferred from recent uplift rates and the active seismicity. On the scale of the Aar Massif, the aforementioned deformation sequence induced a complex and dense network of large-scale fault zones. The 3D structure of this network and the associated spacing between the individual faults strongly depends on the type of host rock, intensity of background strain and the location (kinematics) within the massif. Similar effects have to be expected in the crystalline rocks underneath the sedimentary cover in Northern Switzerland. However, based on the aforementioned findings, several facts might be in favor for future exploration of deep geothermal energy in the Aar Massif: (i) enhanced permeability in brittle fault rocks, (ii) dense 3D network auf brittle faults, (iii) weak vegetation allows a reliable projection of the structures to depth as well as tracking of their lateral continuation (crucial for estimates on seismic potential) and last but not least the existence of an elevated geothermal gradient.

Herwegh, Marco; Baumberger, Roland; Wehrens, Philip; Schubert, Raphael; Berger, Alfons; Maeder, Urs; Spillmann, Thomas

2014-05-01

249

Microstructural Observations of an `Oceanic Core Complex': Atlantis Massif, 30oN, mid-Atlantic Ridge  

NASA Astrophysics Data System (ADS)

The domal high of Atlantis Massif, an inside-corner high at 30oN on the mid-Atlantic Ridge, is presumed to be the footwall of a major slip detachment fault system. Deformation textures in samples of gabbro and peridotite collected from the massif follow a down-temperature path in which high-temperature strain fabrics are overprinted by progressively lower temperature deformation, consistent with unroofing of the massif during progressive normal faulting. Locally preserved granulite facies strain fabrics, most common in the upper 1500m of the massif, include dynamically recrystallized olivine that delineate the early history of normal faulting. Hydrous, amphibolite facies deformation and metasomatic veins of amphibole schist commonly overprint granulite textures in peridotite. Pyroxene was metamorphosed in shear zones to form fine-grained schist composed of strain-free, pale-brown hornblende rimmed and/or overgrown by tremolite. These amphiboles have a strong preferred orientation (SPO and CPO), and are aligned parallel to vein walls. Rimming and overgrowth of hornblende by tremolite indicates deformation continued as temperatures dropped from amphibolite to greenschist conditions. Transitional brittle/plastic and cataclastic fabrics occur at variable depths, but are most common in the upper part of the massif. A 0.5 to 1 meter thick deposit of moderately- to well-indurated carbonate deposited as calcareous ooze and containing fauna of pteropods, foraminifera, and coccoliths unconformably overlies these footwall rocks. This deposit was cemented by precipitation of aragonite in pore space and/or recrystallization of biologic material composed of aragonite to crystalline sparite. Precipitation and recrystallization of aragonite resulted from serpentinization-derived fluids percolating diffusely through the sediment column. Crosscutting, filled fractures suggest that calcareous ooze infiltrated joints and active faults in footwall rocks and prior lithified carbonate, and were involved in continued deformation. Recrystallized, lithified ooze deformed concurrently with tremolite and talc growth in zones of carbonate-tremolite-talc schist, and/or is the matrix of cohesive fault breccias. These relations suggest that core complex faulting was concurrent with deposition and lithification of the carbonate. Serpentinization and faulting therefore continued after footwall rocks were unroofed and exposed at the seafloor.

Schroeder, T.; John, B. E.; Kelley, D.

2001-12-01

250

Formation of clay minerals and exhumation of lower-crustal rocks at Atlantis Massif, Mid-Atlantic Ridge  

NASA Astrophysics Data System (ADS)

Low-temperature alteration products in gabbros from the ocean floor have significant implications for incipient processes of seawater-rock interaction and exhumation tectonics of the lower-crustal rocks. In this paper we report mode of occurrence and mineralogical characteristics of clay minerals in gabbroic rocks recovered from Integrated Ocean Drilling Program (IODP) Hole U1309D at an oceanic core complex, Atlantis Massif, Mid-Atlantic Ridge at 30°N. The clay minerals were identified by optical microscope, electron microprobe, Raman spectrometer, and transmission electron microscope as mainly composed of mixed-layer saponite-talc, saponite, and vermiculite. They are characteristically rich in iron that is significantly oxidized and distributed into the tetrahedral site, suggesting a relatively high-temperature condition for oxidation. They are restricted to domains near the contacts between olivine and talc or form pseudomorphs after olivine near microcracks filled with zeolite or clay minerals. These facts suggest the infiltration of oxidative seawater and reactions to variable fluid/rock ratios at variable temperatures. Close association of vermiculite with microcracks radiated from serpentinized olivine suggests that the deep infiltration of seawater at an off-axis region was caused by fracturing resulting from serpentinization and enhanced by relatively abundant olivine-rich lithology at Atlantis Massif. Compared with gabbroic rocks of an oceanic core complex at ultraslow-spreading ridge (ODP Hole 735B), those of Atlantis Massif substantially lack mixed-layer smectite-chlorite. Mixed-layer smectite-chlorite is a product of prehnite-actinolite to greenschist facies alteration and looks to preserve a record of ambient thermal structure through which the massif passed on rising to a shallow level. The absence of pervasive formation of mixed-layer smectite-chlorite under relatively reducing conditions suggests low permeability and/or limited fluid-rock reactions on the way to shallow levels. From the observation and consideration of the characteristics of clay minerals, sequence and distribution of static alteration related to fracturing, original lithology, and tectonic settings of the oceanic core complexes, we conclude that Atlantis Massif was more rapidly exhumed to the oxidative subseafloor environment than Atlantis Bank. The difference of exhumation rate possibly reflected either the disparity in spreading rate between the whole ridge systems or regional variation of exhumation tectonics between the two oceanic core complexes.

Nozaka, Toshio; Fryer, Patricia; Andreani, Muriel

2008-11-01

251

Palaeomagnetic constraints on the evolution of the Atlantis Massif oceanic core complex (Mid-Atlantic Ridge, 30°N)  

NASA Astrophysics Data System (ADS)

Oceanic core complexes expose lower crustal and upper mantle rocks on the seafloor by tectonic unroofing in the footwalls of large-slip detachment faults. They represent a fundamental component of the seafloor spreading system at slow and ultraslow axes. One of the most extensively studied oceanic core complexes is Atlantis Massif, located at 30°N at the intersection of the Atlantis Transform Fault and the Mid Atlantic Ridge (MAR). The central dome of the massif exposes the corrugated detachment fault surface and was drilled during IODP Expedition 304/305 (Hole U1309D). This sampled a 1.4 km faulted and complexly layered footwall section dominated by gabbroic lithologies with minor ultramafic rocks. Palaeomagnetic analyses demonstrate that the gabbroic sequences at Atlantis Massif carry highly stable remanent magnetizations that provide valuable information on the evolution of the section. Thermal demagnetization experiments recover high unblocking temperature components of reversed polarity (R1) throughout the gabbroic sequences. Correlation of structures observed on oriented borehole (FMS) images and those recorded on unoriented core pieces allows reorientation of R1 remanences. The mean remanence direction in true geographic coordinates constrains the tectonic rotation experienced by the Atlantis Massif footwall, indicating a 46°±6° counterclockwise around a MAR-parallel horizontal axis trending 011°±6°. The detachment fault therefore initiated at a steep dip of >50° and then rotated flexurally to its present day low angle geometry (consistent with a 'rolling-hinge' model for detachment evolution). In a number of intervals, the gabbros exhibit a complex remanence structure with the presence of additional intermediate temperature normal (N1) and lower temperature reversed (R2) polarity components, suggesting an extended period of remanence acquisition during different polarity intervals. Sharp break-points between different polarity components suggest that they were acquired by a thermal mechanism. There appears to be no correlation between remanence structure and either the igneous stratigraphy or the distribution of alteration in the core. Instead, the remanence data are consistent with a model in which the lower crustal section acquired magnetizations of different polarity during a protracted cooling history spanning two geomagnetic reversals. The crystallization age of the section (1.2 Ma; derived from Pb/U zircon dating) suggests that the R1 component was acquired during geomagnetic polarity chron C1r.2r, N1 during chron C1r.1n (Jaramillo) and R2 during chron C1r.1r. By considering the maximum time intervals available for acquisition of the N1 and R2 components and correcting laboratory unblocking temperatures accordingly, the data provide additional constraints on the thermal evolution of the Atlantis Massif footwall.

Morris, A.; Pressling, N.; Gee, J. S.

2011-12-01

252

Palaeomagnetic constraints on the evolution of the Atlantis Massif oceanic core complex (Mid-Atlantic Ridge, 30°N)  

NASA Astrophysics Data System (ADS)

Oceanic core complexes expose lower crustal and upper mantle rocks on the seafloor by tectonic unroofing in the footwalls of large-slip detachment faults. They represent a fundamental component of the seafloor spreading system at slow and ultraslow axes. One of the most extensively studied oceanic core complexes is Atlantis Massif, located at 30°N at the intersection of the Atlantis Transform Fault and the Mid Atlantic Ridge (MAR). The central dome of the massif exposes the corrugated detachment fault surface and was drilled during IODP Expedition 304/305 (Hole U1309D). This sampled a 1.4 km faulted and complexly layered footwall section dominated by gabbroic lithologies with minor ultramafic rocks. Palaeomagnetic analyses demonstrate that the gabbroic sequences at Atlantis Massif carry highly stable remanent magnetizations that provide valuable information on the evolution of the section. Thermal demagnetization experiments recover high unblocking temperature components of reversed polarity (R1) throughout the gabbroic sequences. Correlation of structures observed on oriented borehole (FMS) images and those recorded on unoriented core pieces allows reorientation of R1 remanences. The mean remanence direction in true geographic coordinates constrains the tectonic rotation experienced by the Atlantis Massif footwall, indicating a 46°±6° counterclockwise around a MAR-parallel horizontal axis trending 011°±6°. The detachment fault therefore initiated at a steep dip of >50° and then rotated flexurally to its present day low angle geometry (consistent with a 'rolling-hinge' model for detachment evolution). In a number of intervals, the gabbros exhibit a complex remanence structure with the presence of additional intermediate temperature normal (N1) and lower temperature reversed (R2) polarity components, suggesting an extended period of remanence acquisition during different polarity intervals. Sharp break-points between different polarity components suggest that they were acquired by a thermal mechanism. There appears to be no correlation between remanence structure and either the igneous stratigraphy or the distribution of alteration in the core. Instead, the remanence data are consistent with a model in which the lower crustal section acquired magnetizations of different polarity during a protracted cooling history spanning two geomagnetic reversals. The crystallization age of the section (1.2 Ma; derived from Pb/U zircon dating) suggests that the R1 component was acquired during geomagnetic polarity chron C1r.2r, N1 during chron C1r.1n (Jaramillo) and R2 during chron C1r.1r. By considering the maximum time intervals available for acquisition of the N1 and R2 components and correcting laboratory unblocking temperatures accordingly, the data provide additional constraints on the thermal evolution of the Atlantis Massif footwall.

Morris, A.; Pressling, N.; Gee, J. S.

2012-04-01

253

Raman mapping of coesite inclusions in garnet from the Kokchetav Massif (Northern Kazakhstan)  

NASA Astrophysics Data System (ADS)

Coesite inclusions occur in a wide range of lithologies and coesite is therefore a powerful ultrahigh-pressure (UHP) indicator. The transformation of coesite to quartz is evidenced by three optically well identifiable characteristics (e.g. palisade textures, radial crack patterns, polycrystalline quartz pseudomorphs). Under overpressure monomineralic coesite (on an optical basis), lacking the above transformation characteristics may survive. Raman micro-spectroscopy was applied on monomineralic coesite inclusions in garnet porphyroblasts from diamond-bearing garnet-clinozoisite-biotite gneisses of the Barchi-Kol area (Kokchetav Massif, Northern Kazakhstan). These coesite inclusions are euhedral and display a characteristic anisotropic hallo. However, Raman maps and separate spectra of these inclusions display shifted bands for coesite and quartz. Microscopically undetectable, quartz shows on the Raman map as a thin shell around coesite inclusion. Shift of the main coesite band allows to estimate their overpressure: coesite inclusions record 0-2.4 GPa in garnet and zircon. The quartz shell remains under lower pressure 0-1.6 GPa. The possible application of coesite and quartz Raman geobarometers for UHP metamorphic rocks is discussed.

Korsakov, Andrey V.; Hutsebaut, Didier; Theunissen, Karel; Vandenabeele, Peter; Stepanov, Alexander S.

2007-12-01

254

The French Massif Central: Three domains of the mantle lithosphere identified by seismic anisotropy  

NASA Astrophysics Data System (ADS)

We model the structure of the lithosphere, its thickness and seismic anisotropy, caused mainly by systematic orientation of olivine crystals, from spatial variations of P-wave delay times and the shear-wave splitting observed at a dense network of mobile and permanent stations within the French Massif Central (MC). Three major lithosphere domains with different seismic anisotropy are distinguished. A suture in the deep lithosphere limits the thick lithosphere of the Limousin (western MC) characterized by a consistent anisotropic pattern with high velocities dipping to the west. The eastern MC, comprising two different domains with a weakened mantle fabric in the south, shows the high velocities dipping systematically to the east. The suture between the western and eastern MC parallels the major crustal boundary, the late Variscan Sillon Houiller (SH) transfer fault in the south and the Tauve- Aigueperse fault (TA) in the north, with an offset of 10-20 km to the east. The offset of the crustal and mantle parts of the same suture indicates that the rigid upper crust might be detached from the mantle lithosphere. We suggest that the mantle suture, hidden beneath an allochthonous crust, was reactivated during the Cenozoic extension of the weakened and thinned lithosphere in the south of the eastern MC and predestined a space for the major volcanism (Mont Dore, Cantal).

Babuska, V.; Plomerova, J.; Vecsey, L.; Granet, M.; Achauer, U.

2003-04-01

255

Natural annealing of dynamically recrystallised quartzite fabrics: Example from the Cévennes, SE French Massif Central  

NASA Astrophysics Data System (ADS)

Quartzite samples from the SW-Cévennes (French Massif Central) have been investigated in order to reveal the effects of annealing on a previously dynamically recrystallised quartz fabric. The studied quartzite is interlayered with turbiditic micaschist series, and after regional deformation the whole sequence was intruded by the St-Guiral granodiorite at 1-3 kbar and up to 650-700 °C. Recorded crystallographic preferred orientation (CPO) patterns of the dynamically recrystallised quartzite are classified as type I with a monoclinic symmetry and type II with an orthorhombic symmetry. Type I is related to simple shear-dominated deformation and type II to apparent constriction. These two fabric types are consistent with structural observation that a constrictive and coaxial deformation regime controlled the formation of non-cylindrical and refolded folds. In the metamorphic aureole, which produced essentially static annealing, CPO patterns intensify slightly and grain size increases towards the granodiorite until the temperature at which inversion from low- to high quartz is triggered. This inversion caused a volume increase and subsequent intergranular stresses activated slip systems fitting the temperature and water content. This study shows that annealing of dynamically recrystallised quartz crystals can activate previously inactive slip systems, reactivate slip systems and amplify older CPO fabrics. This conclusion identifies limits for the use of annealed quartz fabrics in reconstructing structural histories when earlier dynamic recrystallisation has occured.

Augenstein, Clemens; Burg, Jean-Pierre

2011-03-01

256

Saldanha Massif, Mid-Atlantic Ridge: A Controlled Source EM Study  

NASA Astrophysics Data System (ADS)

In November-December 2004 a controlled source electromagnetic (CSEM) survey was carried out on the axis of the Mid-Atlantic Ridge during cruise Charles Darwin 167. The work is centred on a non-transform offset between the FAMOUS and AMAR segments, at 36 34' North. Here, a prominent feature is the Saldanha massif: a dome of unroofed mantle rocks, consisting largely of serpentised peridotites, and at whose summit significant low-temperature hydrothermal venting has been documented. Our objective is to determine the distribution of electrical resistivity and hence porosity over a volume of ~ 10 km x 10 km x 3 km vertically, in order to constrain the degree of penetration of seawater into the crust and uppermost mantle; to contrast the porosity structure here with volcanically hosted systems away from segment boundaries elsewhere on the MAR; and to constrain models of non-volcanic heat sources and hydrothermal circulation in ultramafic settings at slow spreading ridges. In addition to the CSEM survey we obtained swath bathymetry, gravity and magnetic data; water column physical properties and seafloor current data; and a number of dredge and gravity core samples. We shall present details of the data and samples, together with our preliminary analysis of the results.

Sinha, M. C.; Santos, F.; Dzhatieva, Z.; Dias, A.; Marques, A. F.; Silva, N.; de Nijs, I.

2005-12-01

257

Time scales of regional circulation of saline fluids in continental aquifers (Armorican massif, Western France)  

NASA Astrophysics Data System (ADS)

In recent decades, saline fluids have been sampled worldwide at great depths in continental basements. Although some of them have been attributed to marine transgressions the mechanisms allowing their circulation is not understood. In this paper, we describe the horizontal and vertical distribution of moderately saline fluids (60 to 1400 mg L-1) sampled at depths ranging from 41 to 200 m in aquifers at the regional scale of the Armorican Massif (northwestern France). The horizontal and vertical distributions of high chloride concentrations are in good agreement with both the altitudinal and vertical limits and succession of the three major transgressions between the Mio-Pliocene and Pleistocene ages. The mean chloride concentration for each transgression area is exponentially related to the time spanned until present. It defines the potential laws of leaching of marine waters by fresh meteoric waters. The results of the Armorican aquifers provide the first observed constraints for the time scales of seawater circulation in the continental basement and the subsequent leaching by fresh meteoric waters. The general trend of increasing chloride concentration with depth and the time frame for the flushing process provide useful information to develop conceptual models of the paleo-functionning of Armorican aquifers.

Armandine Les Landes, A.; Aquilina, L.; Davy, P.; Vergnaud, V.; le Carlier, C.

2014-06-01

258

The limnology and biology of the Dufek Massif, Transantarctic Mountains 82° South  

NASA Astrophysics Data System (ADS)

Very little is known about the higher latitude inland biology of continental Antarctica. In this paper we describe the limnology and biology of the Dufek Massif, using a range of observational, microscopic and molecular methods. Here two dry valleys are home to some of the southernmost biota on Earth. Cyanobacteria were the dominant life forms, being found in lakes and ponds, in hypersaline brines, summer melt water, relict pond beds and in exposed terrestrial habitats. Their species diversity was the lowest yet observed in Antarctic lakes. Green algae, cercozoa and bacteria were present, but diatoms were absent except for a single valve; likely windblown. Mosses were absent and only one lichen specimen was found. The Metazoa included three microbivorous tardigrades ( Acutuncus antarcticus, Diphascon sanae and Echiniscus (cf) pseudowendti) and bdelloid rotifer species, but no arthropods or nematodes. These simple faunal and floral communities are missing most of the elements normally present at lower latitudes in the Antarctic which is probably a result of the very harsh environmental conditions in the area.

Hodgson, Dominic A.; Convey, Peter; Verleyen, Elie; Vyverman, Wim; McInnes, Sandra J.; Sands, Chester J.; Fernández-Carazo, Rafael; Wilmotte, Annick; De Wever, Aaike; Peeters, Karolien; Tavernier, Ines; Willems, Anne

2010-08-01

259

Looking Northeast in Oxide Building at Reactors on Second Floor ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Looking Northeast in Oxide Building at Reactors on Second Floor Including Reactor One (Left) and Reactor Two (Right) - Hematite Fuel Fabrication Facility, Oxide Building & Oxide Loading Dock, 3300 State Road P, Festus, Jefferson County, MO

260

7. VIEW, LOOKING NORTHEAST, SHOWING REAR TBRACE. Photocopy of photograph. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. VIEW, LOOKING NORTHEAST, SHOWING REAR T-BRACE. Photocopy of photograph. Susan Kardas, photographer, December 1984 - Shooters Island, Ships Graveyard, Vessel No. 37, Newark Bay, Staten Island (subdivision), Richmond County, NY

261

4. VIEW SHOWING EXCAVATION IN ARIZONA CANAL, 8 MILES NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. VIEW SHOWING EXCAVATION IN ARIZONA CANAL, 8 MILES NORTHEAST OF PHOENIX. NOTE MEN DRILLING AND EXCAVATING IN OPERATION; CAMELBACK MOUNTAIN IN THE DISTANCE Photographer: Walter J. Lubken. No date - Arizona Canal, North of Salt River, Phoenix, Maricopa County, AZ

262

5. CLOSER VIEW OF REAR ELEVATION, LOOKING NORTHEAST. TAKEN 1908. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. CLOSER VIEW OF REAR ELEVATION, LOOKING NORTHEAST. TAKEN 1908. PLEASE CREDIT: BUREAU OF YARDS AND DOCKS, NATIONAL ARCHIVES - U. S. Naval Asylum, Laning Hall, Gray's Ferry Avenue, Philadelphia, Philadelphia County, PA

263

4. REAR SIDE OF HOSPITAL BUILDING, LOOKING NORTHEAST. TAKEN 1908. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. REAR SIDE OF HOSPITAL BUILDING, LOOKING NORTHEAST. TAKEN 1908. PLEASE CREDIT: BUREAU OF YARDS AND DOCKS, NATIONAL ARCHIVES - U. S. Naval Asylum, Laning Hall, Gray's Ferry Avenue, Philadelphia, Philadelphia County, PA

264

6. EXTERIOR NORTHEAST CORNER VIEW, FACING SOUTHWEST. CLEAR SHOP OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. EXTERIOR NORTHEAST CORNER VIEW, FACING SOUTHWEST. CLEAR SHOP OF CANOPY 723 AS WELL NORTH FACADES OF ADDITIONS TO BUILDING 10. - NASA Industrial Plant, Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

265

View from southwest to northeast of industrial building. Far right ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View from southwest to northeast of industrial building. Far right doors lead to vehicle service and maintenance bays - Stanley R. Mickelsen Safeguard Complex, Industrial Building, One block southwest of Limited Area Sentry Station, Nekoma, Cavalier County, ND

266

96. VIEW OF DECK OF PIER EXTENSION, LOOKING NORTHEAST FROM ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

96. VIEW OF DECK OF PIER EXTENSION, LOOKING NORTHEAST FROM END OF PIER. BUILDINGS ON 3RD TEE ARE IN THE BACKGROUND - Huntington Beach Municipal Pier, Pacific Coast Highway at Main Street, Huntington Beach, Orange County, CA

267

2. BUILDING 213, EAST SIDE, FROM NORTHEAST CORNER OF INTERSECTION ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. BUILDING 213, EAST SIDE, FROM NORTHEAST CORNER OF INTERSECTION OF D AND 3RD STREETS, LOOKING WEST. - Oakland Naval Supply Center, Dry Provisions Storehouses, Between Second & Third Streets & B & F Streets, Oakland, Alameda County, CA

268

LOFT. Contextual view of exhaust stack. Camera facing northeast. At ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

LOFT. Contextual view of exhaust stack. Camera facing northeast. At right of view if compressor building (TAN-637). Date: March 2004. INEEL negative no. HD-39-6-1 - Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

269

3. NORTHEAST SIDE OF OFFICE BUILDING ON SOUTH MAIN STREET, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. NORTHEAST SIDE OF OFFICE BUILDING ON SOUTH MAIN STREET, FACING WEST. SOUTHEAST END OF FACTORY IS VISIBLE LEFT OF CENTER. - Savage Tire Factory, Office Building, 2301 Main Street, San Diego, San Diego County, CA

270

Looking Northeast at Southwest End of Maintenance Shop with Milling ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Looking Northeast at Southwest End of Maintenance Shop with Milling Machines, Hoist, Electrical Boxes in Recycle Recovery Building - Hematite Fuel Fabrication Facility, Recycle Recovery Building, 3300 State Road P, Festus, Jefferson County, MO

271

8. VIEW OF SOUTHWEST END OF GERMAN VILLAGE LOOKING NORTHEAST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. VIEW OF SOUTHWEST END OF GERMAN VILLAGE LOOKING NORTHEAST. - Dugway Proving Ground, German-Japanese Village, German Village, South of Stark Road, in WWII Incendiary Test Area, Dugway, Tooele County, UT

272

2. GENERAL VIEW OF COMPLEX FROM SANDPIT LOOKING NORTHEAST, SAND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. GENERAL VIEW OF COMPLEX FROM SANDPIT LOOKING NORTHEAST, SAND DRAINING & DRYING BUILDING (left) AND SAND-SORTING BUILDING (right) - Mill "C" Complex, South of Dee Bennet Road, near Illinois River, Ottawa, La Salle County, IL

273

1. GENERAL VIEW OF COMPLEX FROM SANDPIT LOOKING NORTHEAST, SAND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. GENERAL VIEW OF COMPLEX FROM SANDPIT LOOKING NORTHEAST, SAND DRAINING & DRYING BUILDING (left) AND SAND-SORTING BUILDING (right) - Mill "C" Complex, South of Dee Bennet Road, near Illinois River, Ottawa, La Salle County, IL

274

27. RECORDS VAULT UNDER STAIRWAY IN NORTHEAST CORNER OF MAIN ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

27. RECORDS VAULT UNDER STAIRWAY IN NORTHEAST CORNER OF MAIN MEETING ROOM. It is not known when this vault was built. It has cavity walls. - Twelfth Street Meeting House, 20 South Twelfth Street, Philadelphia, Philadelphia County, PA

275

Facility No. 175, exterior oblique view of northeast and northwest ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Facility No. 175, exterior oblique view of northeast and northwest sides, corner of Facility No. 176 is in background - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

276

View northeast toward west side of building 68. View partially ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View northeast toward west side of building 68. View partially obscured by automobiles and storage structures. - Naval Air Station North Island, Seaplane Hangars, Roe Street, North Island, San Diego, San Diego County, CA

277

View northeast; detail of southwest corner showing damage to façade ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View northeast; detail of southwest corner showing damage to façade - Naval Base Philadelphia-Philadelphia Naval Shipyard, Foundry-Propeller Shop, North of Porter Avenue, west of Third Street West, Philadelphia, Philadelphia County, PA

278

3. VIEW NORTHEAST OF PORT BOW OF JFK IN DRYDOCK ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. VIEW NORTHEAST OF PORT BOW OF JFK IN DRYDOCK NO. 5; PAINTERS WORKING APPLYING ANTI-FOULING PAINT BELOW WATER LINE. - Naval Base Philadelphia-Philadelphia Naval Shipyard, Dry Dock No. 5, League Island, Philadelphia, Philadelphia County, PA

279

24. VIEW TO NORTHEAST; OBLIQUE VIEW OF SOUTH RETAINING WALL ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

24. VIEW TO NORTHEAST; OBLIQUE VIEW OF SOUTH RETAINING WALL AND PARKING STRUCTURE BELOW REA LOADING DOCK (Asano) - Los Angeles Union Passenger Terminal, Mail, Baggage, & Express Building, 800 North Alameda Street, Los Angeles, Los Angeles County, CA

280

CONCRETE RETAINING WALL, DETAIL NEAR LOADING PLATFORM, VIEW TO NORTHEAST, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

CONCRETE RETAINING WALL, DETAIL NEAR LOADING PLATFORM, VIEW TO NORTHEAST, BLM STORAGE SHED VISIBLE IN BACKGROUND. - Cedar City Automotive Repair Shop, Concrete Retaining Wall, 820 North Main Street, Cedar City, Iron County, UT

281

CONCRETE RETAINING WALL, DETAIL NEAR LOADING PLATFORM, VIEW TO NORTHEAST, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

CONCRETE RETAINING WALL, DETAIL NEAR LOADING PLATFORM, VIEW TO NORTHEAST, WITH SCALE, BLM STORAGE SHED VISIBLE IN BACKGROUND. - Cedar City Automotive Repair Shop, Concrete Retaining Wall, 820 North Main Street, Cedar City, Iron County, UT

282

13. Detail, typical window with fireproof shutters closed, northeast rear, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

13. Detail, typical window with fireproof shutters closed, northeast rear, view to southwest, 135mm lens. Note cracks evidencing structural failure. - Benicia Arsenal, Powder Magazine No. 5, Junction of Interstate Highways 680 & 780, Benicia, Solano County, CA

283

14. Detail, crack evidencing structural failure, northeast rear, view to ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

14. Detail, crack evidencing structural failure, northeast rear, view to southwest, 90mm lens. Note failure of sandstone lintel above window. - Benicia Arsenal, Powder Magazine No. 5, Junction of Interstate Highways 680 & 780, Benicia, Solano County, CA

284

9. View to northeast. Oblique view of upstream side of ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. View to northeast. Oblique view of upstream side of bridge from approximately deck level. (90mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

285

12. Detail, typical window with fireproof shutters open, northeast rear, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

12. Detail, typical window with fireproof shutters open, northeast rear, view to southwest, 135mm lens. Note cracks evidencing structural failure. - Benicia Arsenal, Powder Magazine No. 5, Junction of Interstate Highways 680 & 780, Benicia, Solano County, CA

286

15. View to northeast. View along centerline from below deck; ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

15. View to northeast. View along centerline from below deck; detail of bent and floor beams. (65mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

287

12. Oblique view of northeast facade, showing missing rain gutter, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

12. Oblique view of northeast facade, showing missing rain gutter, deteriorated slate roof, broken windows in tower; view west-northwest, 90mm lens. - Southern Pacific Depot, 559 El Camino Real, San Carlos, San Mateo County, CA

288

15. Detail, cracks evidencing structural failure, northeast rear, view to ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

15. Detail, cracks evidencing structural failure, northeast rear, view to southwest, 90mm lens. - Benicia Arsenal, Powder Magazine No. 5, Junction of Interstate Highways 680 & 780, Benicia, Solano County, CA

289

13. View to northeast. View along centerline from Humboldt County ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

13. View to northeast. View along centerline from Humboldt County side of bridge. (90mm lens) - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

290

15. Detail, view northeast across second floor deck. Scale visible ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

15. Detail, view northeast across second floor deck. Scale visible at right of door opening into 'Fireplace' room. 'Van Gogh' room at left. - Deetjen's Big Sur Inn, Hayloft Building, East Side of State Highway 1, Big Sur, Monterey County, CA

291

8. View northeast of 'Champagne' room toward doorway. Scale visible ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. View northeast of 'Champagne' room toward doorway. Scale visible against door frame beyond bed. - Deetjen's Big Sur Inn, Champagne Building, East Side of State Highway 1, Big Sur, Monterey County, CA

292

10. Detail, second floor employees' deck area, view to northeast. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

10. Detail, second floor employees' deck area, view to northeast. Scale stile visible at right of door. - Deetjen's Big Sur Inn, Big Sur Inn Building, East Side of State Highway 1, Big Sur, Monterey County, CA

293

13. Dining room at northeast corner of building, view to ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

13. Dining room at northeast corner of building, view to north. Scale stick visible at left of door. - Deetjen's Big Sur Inn, Big Sur Inn Building, East Side of State Highway 1, Big Sur, Monterey County, CA

294

9. Oblique view northwest of east elevation at northeast corner ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. Oblique view northwest of east elevation at northeast corner of building; previous view taken at corner visible at extreme right. - Deetjen's Big Sur Inn, Hayloft Building, East Side of State Highway 1, Big Sur, Monterey County, CA

295

14. Dining room at northeast corner of building, view to ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

14. Dining room at northeast corner of building, view to south. Scale to stick visible at right of door. - Deetjen's Big Sur Inn, Big Sur Inn Building, East Side of State Highway 1, Big Sur, Monterey County, CA

296

2. View southwest of northeast end. Scale visible at bottom ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. View southwest of northeast end. Scale visible at bottom of stairs, against corner of building. - Deetjen's Big Sur Inn, Champagne Building, East Side of State Highway 1, Big Sur, Monterey County, CA

297

VIEW NORTHEAST, LEFT BUILDING 40 WIRE WAREHOUSE (1915) RIGHT BUILDING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW NORTHEAST, LEFT BUILDING 40 WIRE WAREHOUSE (1915) RIGHT BUILDING 42 ROPE SHOP (1910) - John A. Roebling's Sons Company & American Steel & Wire Company, South Broad, Clark, Elmer, Mott & Hudson Streets, Trenton, Mercer County, NJ

298

SOUTHWEST FACADE AS SEEN FROM FLIGHTLINE, VIEW FACING NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

SOUTHWEST FACADE AS SEEN FROM FLIGHTLINE, VIEW FACING NORTHEAST - Naval Air Station Barbers Point, Control Tower & Aviation Operations Building, Near intersection of runways between Hangar 110 & Building 115, Ewa, Honolulu County, HI

299

NORTHEAST FACADE AND ONESTORY WING FROM PARKING LOT SIDE, VIEW ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

NORTHEAST FACADE AND ONE-STORY WING FROM PARKING LOT SIDE, VIEW FACING SOUTH-SOUTHEAST. - Naval Air Station Barbers Point, Control Tower & Aviation Operations Building, Near intersection of runways between Hangar 110 & Building 115, Ewa, Honolulu County, HI

300

NORTHEAST FACADE AND ONESTORY WING FROM ENTRY DRIVE, VIEW FACING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

NORTHEAST FACADE AND ONE-STORY WING FROM ENTRY DRIVE, VIEW FACING SOUTHWEST. - Naval Air Station Barbers Point, Control Tower & Aviation Operations Building, Near intersection of runways between Hangar 110 & Building 115, Ewa, Honolulu County, HI

301

NORTHEAST FACADE AND ONESTORY WING, VIEW FACING SOUTHSOUTHWEST. Naval ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

NORTHEAST FACADE AND ONE-STORY WING, VIEW FACING SOUTH-SOUTHWEST. - Naval Air Station Barbers Point, Control Tower & Aviation Operations Building, Near intersection of runways between Hangar 110 & Building 115, Ewa, Honolulu County, HI

302

NORTHEAST FACADE AND ONESTORY WING, VIEW FACING SOUTHSOUTHWEST (with scale ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

NORTHEAST FACADE AND ONE-STORY WING, VIEW FACING SOUTH-SOUTHWEST (with scale stick). - Naval Air Station Barbers Point, Control Tower & Aviation Operations Building, Near intersection of runways between Hangar 110 & Building 115, Ewa, Honolulu County, HI

303

View of stack with west elevation; camera facing northeast. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of stack with west elevation; camera facing northeast. - Mare Island Naval Shipyard, Central Power Plant, California Avenue, norhtwest corner of California Avenue & Seventh Street, Vallejo, Solano County, CA

304

86. Mezzanine level looking northeast showing connection between northwest leg ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

86. Mezzanine level looking northeast showing connection between northwest leg of central pylon and main anchorage beam; up-flight of helical stair at right. February 1984. - Statue of Liberty, Liberty Island, Manhattan, New York, New York County, NY

305

3. In context, from southwest facing northeast, playground between buildings. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. In context, from southwest facing northeast, playground between buildings. Building 12-A, right, Building 12-A, left. - Clark Howell Homes, Building 12-B, 516 Lovejoy Street, Atlanta, Fulton County, GA

306

3. In context, from southwest facing northeast, playground between buildings. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. In context, from southwest facing northeast, playground between buildings. Building 12-A on right, Building 12-B on left. - Clark Howell Homes, Building 12-A, 500 Lovejoy Street, Atlanta, Fulton County, GA

307

15. Basement level of Saw Mill looking northeast into the ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

15. Basement level of Saw Mill looking northeast into the turbine pit. Headrace for the Grist Mill is beyond the wall to the right. - Sugar River Grist Mill & Saw Mill, 159 Main Street, Claremont, Sullivan County, NH

308

CAR INTERIOR, VIEW TOWARD THE NORTHEAST, FIREFINDER TABLE (WITH BARS) ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

CAR INTERIOR, VIEW TOWARD THE NORTHEAST, FIREFINDER TABLE (WITH BARS) IN CENTER OF ROOM; VIEW OUT THE DOOR IS HETCH HETCHY VALLEY - North Mountain Lookout, Stanislaus National Forest, Groveland, Tuolumne County, CA

309

9. CLIFTON HILL, LOOKING NORTHEAST ACROSS STREAM FROM HAZEL WALK ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. CLIFTON HILL, LOOKING NORTHEAST ACROSS STREAM FROM HAZEL WALK Photocopy of photograph, 1930s National Park Service, National Capital Region files - Dumbarton Oaks Park, Thirty-second & R Streets Northwest, Washington, District of Columbia, DC

310

1. STONE CABIN II FROM ABOVE NORTHEAST CORNER. CAMERA POINTED ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. STONE CABIN II FROM ABOVE NORTHEAST CORNER. CAMERA POINTED WEST. - Florida Mountain Mining Sites, Stone Cabin II, West slope Florida Mountain, East of Empire State Mine below summit, Silver City, Owyhee County, ID

311

92. VIEW OF CHART RECORDERS AND PERSONAL COMPUTER LINING NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

92. VIEW OF CHART RECORDERS AND PERSONAL COMPUTER LINING NORTHEAST CORNER OF AUTOPILOT ROOM - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

312

7. NORTHEAST CORNER DETAIL SHOWING LOG JOINERY. AT RIGHT IS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. NORTHEAST CORNER DETAIL SHOWING LOG JOINERY. AT RIGHT IS REAR SHED ROOM ADDITION (copy negative, original 35 mm negative in field records) - Thomas Jefferson Walling Log Cabin, Henderson, Rusk County, TX

313

41. Detail, northeast facade, original door from platform to waiting ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

41. Detail, northeast facade, original door from platform to waiting room, now non-functional, view to southwest, 90mm lens; compare with CA-2278-13. - Southern Pacific Depot, 559 El Camino Real, San Carlos, San Mateo County, CA

314

View from southwest to northeast of cooling towers for perimeter ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View from southwest to northeast of cooling towers for perimeter acquisition radar building and PAR power plant - Stanley R. Mickelsen Safeguard Complex, Cooling Tower, In Limited Access Area, between Service Roads D & A, Nekoma, Cavalier County, ND

315

8. DETAIL VIEW, LOOKING NORTHEAST, SHOWING OUTRIGGERS FOR LATERAL BRACING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. DETAIL VIEW, LOOKING NORTHEAST, SHOWING OUTRIGGERS FOR LATERAL BRACING FOR TRUSSES AND BOTTOM CHORD CONNECTIONS. - White Bowstring Arch Truss Bridge, Spanning Yellow Creek at Cemetery Drive (Riverside Drive), Poland, Mahoning County, OH

316

Northeast Project/CNEN (Comissao Nacional de Energia Nuclear).  

National Technical Information Service (NTIS)

The subprojects from the Northeast/CNEN project, that aims to disseminate the benefits of nuclear energy are described. Those subprojects are the following: food conservation, energy, health, hydric resources, mineral and agriculture, all of them have as ...

R. N. Alves G. F. Ribeiro J. O. V. Lima G. H. Dornelles J. J. Laborne

1987-01-01

317

32. GENERAL VIEW LOOKING NORTHEAST, SHOWING DRAFT CONES AND INTAKE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

32. GENERAL VIEW LOOKING NORTHEAST, SHOWING DRAFT CONES AND INTAKE TUBES. - Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

318

32. INTERIOR VIEW, MUSIC ROOM LOCATED AT THE NORTHEAST CORNER ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

32. INTERIOR VIEW, MUSIC ROOM LOCATED AT THE NORTHEAST CORNER OF THE HOUSE ON THE FIRST FLOOR, LOOKING TO THE FIREPLACE IN THE EAST WALL - Arlington Place, 331 Cotton Avenue, Southwest, Birmingham, Jefferson County, AL

319

1. HOUSE, VIEW TO NORTHEAST, SUMMER KITCHEN AND SMOKE HOUSE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. HOUSE, VIEW TO NORTHEAST, SUMMER KITCHEN AND SMOKE HOUSE ARE IN THE BACKGROUND - Kiel Farmstead, House, East side State Route 4, one half mile south of U.S. Route 64, Mascoutah, St. Clair County, IL

320

22. View of historic district looking northeast; road in foreground ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

22. View of historic district looking northeast; road in foreground and Ogeechee River in background - Richmond Hill Plantation, East of Richmond Hill on Ford Neck Road, Richmond Hill, Bryan County, GA

321

13. View of historic district looking northeast, with road to ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

13. View of historic district looking northeast, with road to left and Ogeechee River in background - Richmond Hill Plantation, East of Richmond Hill on Ford Neck Road, Richmond Hill, Bryan County, GA

322

Northeast Scotland Coastal Field Guide and Geographical Essays.  

National Technical Information Service (NTIS)

Contents: (Part One) General characteristics of Northeast Coast; General characteristics of Northwest Sutherland Coast; General characteristics of Easter Ross Coast. (Part Two) Contemporary Morphology of the face of the foredunes at Forvie; Aberdeen Beach...

W. Ritchie

1983-01-01

323

2. EAST ELEVATION OF BRIDGE SEEN FROM THE NORTHEAST, SHOWING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. EAST ELEVATION OF BRIDGE SEEN FROM THE NORTHEAST, SHOWING APPROACH OF CARRS MILL ROAD FROM EAST. - Mitchell's Mill Bridge, Spanning Winter's Run on Carrs Mill Road, west of Bel Air, Bel Air, Harford County, MD

324

3. View northeast, west facade of Lake Forest (original Forest ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. View northeast, west facade of Lake Forest (original Forest Cottage structure incorporated into renamed structure) - Lake Placid Club, Forest Wing, East side of Mirror Lake Drive, North of State Route 86 & Main, North Elba, Essex County, NY

325

7 CFR 1001.2 - Northeast marketing area.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2009-01-01 true Northeast marketing area. 1001.2 Section 1001.2 Agriculture...Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Milk), DEPARTMENT...

2010-01-01

326

2. Northeast end and southeast side. View to west. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. Northeast end and southeast side. View to west. - Offutt Air Force Base, Looking Glass Airborne Command Post, Vehicle Refueling Shop, In west corner of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

327

11. Northeast front, dock no. 493. View to west. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. Northeast front, dock no. 493. View to west. - Offutt Air Force Base, Looking Glass Airborne Command Post, Nose Docks, On either side of Hangar Access Apron at Northwest end of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

328

2. Northeast front. View to southwest. Offutt Air Force ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. Northeast front. View to southwest. - Offutt Air Force Base, Looking Glass Airborne Command Post, Squadron Operations Building, At southwestern-most boundary of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

329

3. Southwest rear of addition. View to northeast. Offutt ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. Southwest rear of addition. View to northeast. - Offutt Air Force Base, Looking Glass Airborne Command Post, Squadron Operations Building, At southwestern-most boundary of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

330

13. VIEW NORTHEAST, BUILDING 12 INTERIOR, WIND TUNNEL FAN ASSEMBLY ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

13. VIEW NORTHEAST, BUILDING 12 INTERIOR, WIND TUNNEL FAN ASSEMBLY - Naval Surface Warfare Center, Transonic Wind Tunnel Building, Bounded by Clara Barton Parkway & McArthur Boulevard, Silver Spring, Montgomery County, MD

331

2. VIEW OF NORTHWEST SIDE SHOWING NORTHEAST (GABLE END) FRONT. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. VIEW OF NORTHWEST SIDE SHOWING NORTHEAST (GABLE END) FRONT. (BUILDING 114 IS VISIBLE ON RIGHT.) - Fort McPherson, World War II Station Hospital, G. U. Treatment Unit Dispensary, Thorne Avenue, Atlanta, Fulton County, GA

332

13. SETTLING TANK, OVERFLOW DITCH, NORTHEAST SIDE; OVERFLOW DITCH RETURNED ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

13. SETTLING TANK, OVERFLOW DITCH, NORTHEAST SIDE; OVERFLOW DITCH RETURNED EXCESS WATER TO BEAVER BROOK. - Hondius Water Line, 1.6 miles Northwest of Park headquarters building & 1 mile Northwest of Beaver Meadows entrance station, Estes Park, Larimer County, CO

333

1. VIEW OF WATER SOFTENER BUILDING SHOWING NORTHEAST AND SOUTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. VIEW OF WATER SOFTENER BUILDING SHOWING NORTHEAST AND SOUTHEAST FACADES. BOILER HOUSE (BUILDING NO. 4) IN RIGHT BACKGROUND. VIEW TO SOUTH. - VA Medical Center, Aspinwall Division, Water Softener Building, 5103 Delafield Avenue, Aspinwall, Allegheny County, PA

334

87. Detail of powerhouse and tailrace; looking northeast. Photo by ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

87. Detail of powerhouse and tailrace; looking northeast. Photo by Jet Lowe, HAER, 1989. - Puget Sound Power & Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA

335

16. Pierce Street, looking southwest from the northeast corner of ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

16. Pierce Street, looking southwest from the northeast corner of Courthouse Lane and Pierce Street. - East Greenwich, Roughly bounded by Division, Water, London, & Peirce Streets, East Greenwich, Kent County, RI

336

73. View of tunnel intake building, looking northeast. Photo by ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

73. View of tunnel intake building, looking northeast. Photo by Jet Lowe, HAER, 1989. - Puget Sound Power & Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA

337

View facing northeast (60°) of Structure 259, other transmission lines ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View facing northeast (60°) of Structure 25-9, other transmission lines and small farmstead visible in background - Havre Rainbow Transmission Line, Havre City to Great Falls vicinity, Montana, Great Falls, Cascade County, MT

338

View facing northeast of Structure 1034, last numbered structure on ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View facing northeast of Structure 103-4, last numbered structure on northern (Havre) end of Transmission Line - Havre Rainbow Transmission Line, Havre City to Great Falls vicinity, Montana, Great Falls, Cascade County, MT

339

View of front of garage, bays 14, facing northeast ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of front of garage, bays 1-4, facing northeast - Presidio of San Francisco, Officers' Vehicles Garage, 1055 General Kennedy Avenue, Letterman Hospital Complex, San Francisco, San Francisco County, CA

340

View of front of garage bays 57, facing northeast. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of front of garage bays 5-7, facing northeast. - Presidio of San Francisco, Officers' Vehicles Garage, 1055 General Kennedy Avenue, Letterman Hospital Complex, San Francisco, San Francisco County, CA

341

TENANT HOUSE INTERIOR, KITCHEN, NORTH AND EAST WALLS, LOOKING NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

TENANT HOUSE INTERIOR, KITCHEN, NORTH AND EAST WALLS, LOOKING NORTHEAST FROM CENTER OF ROOM - Irvine Ranch Agricultural Headquarters, Carillo Tenant House, Southwest of Intersection of San Diego & Santa Ana Freeways, Irvine, Orange County, CA

342

4. PERSPECTIVE VIEW TO THE NORTHEAST OF THE CREW SHELTER ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. PERSPECTIVE VIEW TO THE NORTHEAST OF THE CREW SHELTER IN AR-8. - Edwards Air Force Base, South Base, Rammed Earth Aircraft Dispersal Revetments, Western Shore of Rogers Dry Lake, Boron, Kern County, CA

343

15. SOUTHEAST AND NORTHEAST WALLS OF CREW SHELTER LOCATED BETWEEN ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

15. SOUTHEAST AND NORTHEAST WALLS OF CREW SHELTER LOCATED BETWEEN THE PURSUIT PLANE BAYS OF AR-9. - Edwards Air Force Base, South Base, Rammed Earth Aircraft Dispersal Revetments, Western Shore of Rogers Dry Lake, Boron, Kern County, CA

344

VIEW LOOKING NORTHEAST AT EARTH MOUND. NOTE THE RECTANGULAR OPENINGS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW LOOKING NORTHEAST AT EARTH MOUND. NOTE THE RECTANGULAR OPENINGS USED FOR OBSERVATION EQUIPMENT AND PERISCOPE TOPS. - Marshall Space Flight Center, Redstone Rocket (Missile) Test Stand, Dodd Road, Huntsville, Madison County, AL

345

12. WEST SIDE, STRONGLY OBLIQUE TO THE NORTH NORTHEAST, ALSO ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

12. WEST SIDE, STRONGLY OBLIQUE TO THE NORTH NORTHEAST, ALSO SHOWING THE FIRST WINDOW BAY OF THE SOUTH SIDE. - United Engineering Company Shipyard, Inspection & Repair Shops, 2900 Main Street, Alameda, Alameda County, CA

346

16. DRY DOCK NO. 5, LOOKING NORTHEAST. NOTE SERVICE BUILDING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

16. DRY DOCK NO. 5, LOOKING NORTHEAST. NOTE SERVICE BUILDING (BUILDING NO. 620) IN LEFT BACKGROUND. - Naval Base Philadelphia-Philadelphia Naval Shipyard, Dry Dock No. 5, League Island, Philadelphia, Philadelphia County, PA

347

14. CONTEXTUAL VIEW OF DRY DOCK NO. 5, LOOKING NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

14. CONTEXTUAL VIEW OF DRY DOCK NO. 5, LOOKING NORTHEAST FROM WEST SIDE. NOTE SERVICE BUILDING (BUILDING NO. 620) IN RIGHT BACKGROUND. - Naval Base Philadelphia-Philadelphia Naval Shipyard, Dry Dock No. 5, League Island, Philadelphia, Philadelphia County, PA

348

OBLIQUE SHOWING NORTHEAST END AND NORTHWEST SIDE. FACILITY 252 PORTION ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

OBLIQUE SHOWING NORTHEAST END AND NORTHWEST SIDE. FACILITY 252 PORTION OF BUILDING IS ON LEFT. - U.S. Naval Base, Pearl Harbor, Combat Intelligence Center, Makalapa Drive in Makalapa Administration Area, Pearl City, Honolulu County, HI

349

OBLIQUE OF THE NORTHEAST END (MAIN ENTRY) AND NORTHWEST SIDE, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

OBLIQUE OF THE NORTHEAST END (MAIN ENTRY) AND NORTHWEST SIDE, WITH FACILITY 346 ON LEFT. - U.S. Naval Base, Pearl Harbor, Joint Intelligence Center, Makalapa Drive in Makalapa Administration Area, Pearl City, Honolulu County, HI

350

OBLIQUE OF NORTHEAST END WITH FACILITY 252 PORTION OF BUILDING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

OBLIQUE OF NORTHEAST END WITH FACILITY 252 PORTION OF BUILDING (FIRST-FLOOR CONCRETE PORTION) IN FOREGROUND. - U.S. Naval Base, Pearl Harbor, Combat Intelligence Center, Makalapa Drive in Makalapa Administration Area, Pearl City, Honolulu County, HI

351

DETAIL OF EAVES AND HOODS OVER WINDOWS ON NORTHEAST END ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

DETAIL OF EAVES AND HOODS OVER WINDOWS ON NORTHEAST END OF NORTHWEST SIDE, WITH SEABEE STATUE IN BACKGROUND. - U.S. Naval Base, Pearl Harbor, Joint Intelligence Center, Makalapa Drive in Makalapa Administration Area, Pearl City, Honolulu County, HI

352

PERSPECTIVE VIEW OF LIBRARY IN ENVIRONMENT CONTEXT, LOOKING NORTHEAST FROM ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

PERSPECTIVE VIEW OF LIBRARY IN ENVIRONMENT CONTEXT, LOOKING NORTHEAST FROM THE ROOF OF THE FRANKLIN INSTITUTE - Free Library of Philadelphia, Central Library, 1901 Vine Street, Philadelphia, Philadelphia County, PA

353

24. Photocopy of photograph. VIEW, LOOKING NORTHEAST, SHOWING WEST FACE, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

24. Photocopy of photograph. VIEW, LOOKING NORTHEAST, SHOWING WEST FACE, photographer unknown, ca. 1931. (Print in possession of the Washington County Highway Department). - Hegeman-Hill Street Bridge, Spanning Batten Kill, .65 mile West of Greenwich, Easton, Washington County, NY

354

7. OBLIQUE CONTEXTUAL VIEW FROM NORTHEAST, SHOWING NORTH AND EAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. OBLIQUE CONTEXTUAL VIEW FROM NORTHEAST, SHOWING NORTH AND EAST WALLS OF ADDITION, AND ALL OF EAST WALL OF MILLS HALL NORTH WING. - Mills Hall, Mills College, 5000 MacArthur Boulevard, Oakland, Alameda County, CA

355

2. MAGAZINE P, WITH ENTRANCE DOOR IN FOREGROUND, LOOKING NORTHEAST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. MAGAZINE P, WITH ENTRANCE DOOR IN FOREGROUND, LOOKING NORTHEAST. - NIKE Missile Base C-84, Underground Storage Magazines & Launcher-Loader Assemblies, Easternmost portion of launch area, Barrington, Cook County, IL

356

54. VIEW LOOKING NORTHEAST AT DENNIS HOTEL, BLENHEIM HOTEL AND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

54. VIEW LOOKING NORTHEAST AT DENNIS HOTEL, BLENHEIM HOTEL AND MARLBOROUGH HOTEL (LEFT TO RIGHT) - Marlborough, Blenheim & Dennis Hotels (aerial views), Between Park Place, Michigan Avenue & Boardwalk, Atlantic City, Atlantic County, NJ

357

6. VIEW LOOKING NORTH TO NORTHEAST OF DENNIS HOTEL, BLENHEIM ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. VIEW LOOKING NORTH TO NORTHEAST OF DENNIS HOTEL, BLENHEIM HOTEL AND MARLBOROUGH HOTEL (LEFT TO RIGHT) IN THE CENTER OF THE PHOTO - Marlborough, Blenheim & Dennis Hotels (aerial views), Between Park Place, Michigan Avenue & Boardwalk, Atlantic City, Atlantic County, NJ

358

View to northeast, showing west elevation and south side. Proximity ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View to northeast, showing west elevation and south side. Proximity of fence of adjacent subdivision precluded photography of north side. - Drew-Sherwood Farm, Barn, 7927 Elk Grove Boulevard, Elk Grove, Sacramento County, CA

359

8. GENERAL VIEW, WEST FRONT, NORTHEAST VIEW Kingsway Center ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. GENERAL VIEW, WEST FRONT, NORTHEAST VIEW - Kingsway Center Commercial Area, Bounded by Kings Highway, Doctor Martin Luther King Boulevard, Page Avenue, & Euclid Avenue, Saint Louis, Independent City, MO

360

1. GENERAL VIEW, EAST FRONT, NORTHEAST CORNER Kingsway Center ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. GENERAL VIEW, EAST FRONT, NORTHEAST CORNER - Kingsway Center Commercial Area, Bounded by Kings Highway, Doctor Martin Luther King Boulevard, Page Avenue, & Euclid Avenue, Saint Louis, Independent City, MO

361

6. View northeast, junction of SR 141 and Rockland Road, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. View northeast, junction of SR 141 and Rockland Road, western estate wall and tree lines to right - A. I. Du Pont Estate, Junction of State Route 141 & Rockland Road, Wilmington, New Castle County, DE

362

1. GENERAL VIEW FROM NORTHEAST. Located southeast of main house, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. GENERAL VIEW FROM NORTHEAST. Located southeast of main house, and west of Slave Quarters No. 2. - Prospect Hill, Slave Quarters No. 3, Near Routes 613 & 607 intersection, Trevilians, Louisa County, VA

363

1. GENERAL VIEW FROM NORTHEAST. Located southeast of main house, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. GENERAL VIEW FROM NORTHEAST. Located southeast of main house, and west of Slave Quarters No. 1. - Prospect Hill, Slave Quarters No. 2, Near Routes 613 & 607 intersection, Trevilians, Louisa County, VA

364

1. GENERAL VIEW from SOUTHEAST. Located northeast of main house, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. GENERAL VIEW from SOUTHEAST. Located northeast of main house, and west of Slave Quarters No. 2 - Prospect Hill, Slave Quarters No. 4, Near Routes 613 & 607 intersection, Trevilians, Louisa County, VA

365

1. View northeast, south front and west side Harvey ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. View northeast, south front and west side - Harvey L. White Farm, Sap House, East side of Route 202, approximately 600 feet north of Hillsborough-Antrim town line, Hillsboro, Hillsborough County, NH

366

4. VIEW OF NORTHEAST RAILING TERMINATION; VIEWED FROM THE WEST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. VIEW OF NORTHEAST RAILING TERMINATION; VIEWED FROM THE WEST - La Verkin Creek Bridge, Spanning La Verkin Creek on State Route 17, 0.7 miles northwest of La Verkin , La Verkin, Washington County, UT

367

1. PORTAL TWO FROM NORTHEAST Sublet Mine No. 6, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. PORTAL TWO FROM NORTHEAST - Sublet Mine No. 6, Portal Two, North portal, west side of Willow Creek Valley, east of County Road No. 306, 3 miles north of U.S. Highway 189, Kemmerer, Lincoln County, WY

368

8. DETAIL OF NORTHEAST ELEVATION SHOWING NEON TWA SIGN AND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. DETAIL OF NORTHEAST ELEVATION SHOWING NEON TWA SIGN AND ROOF MASTS. LOOKING SOUTHWEST. - TWA Maintenance Hangar, South side of Tinicum Island Road, Philadelphia International Airport, Philadelphia, Philadelphia County, PA

369

VIEW NORTHEAST, WEST FRONT OF PACKING SHED (BUILDING 20) AND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW NORTHEAST, WEST FRONT OF PACKING SHED (BUILDING 20) AND BAMBOO STAND ALONG SOUTH FRONT - U.S. Plant Introduction Station, Packing Shed, 11601 Old Pond Road, Glenn Dale, Prince George's County, MD

370

2. Contextual view looking east, northeast, showing west elevation of ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. Contextual view looking east, northeast, showing west elevation of Packing House and Union Ice building. - College Heights Lemon Packing House, 519-532 West First Street, Claremont, Los Angeles County, CA

371

2. General view of Morrison Bridge, looking northeast, with Tom ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. General view of Morrison Bridge, looking northeast, with Tom McCall Riverfront Park in foreground. - Morrison Bridge, Spanning Willamette River on Morrison & Alder Streets, Portland, Multnomah County, OR

372

1. GENERAL VIEW FROM NORTHEAST OF TOMB, DESIGNED BY TOM ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. GENERAL VIEW FROM NORTHEAST OF TOMB, DESIGNED BY TOM P. BARNETT AND BUILT IN 1915 - Bellefontaine Cemetery, Adolphus & Ully Busch Tomb, 4947 West Florissant Avenue, Saint Louis, Independent City, MO

373

2. PERSPECTIVE VIEW OF OVENS ALONG CATS RUN LOOKING NORTHEAST, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. PERSPECTIVE VIEW OF OVENS ALONG CATS RUN LOOKING NORTHEAST, SHOWING OVEN NOS. 159 (RIGHT) THROUGH 163 (LEFT) - Griffin No. 1 Coke Works, Along Cats Run, Southeast of Masontown Bourough (Nicholson Township), Masontown, Fayette County, PA

374

20. GENERAL VIEW OF CONSTRUCTION LOOKING NORTHEAST SHOWING THE CONSTRUCTION ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

20. GENERAL VIEW OF CONSTRUCTION LOOKING NORTHEAST SHOWING THE CONSTRUCTION BRIDGE, GANTRY CRANE AND STRUCTURAL PIERS. - Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

375

VIEW OF BUILDING 221 (TENNIS COURTS) FROM NORTHEAST CORNER, BUILDING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW OF BUILDING 221 (TENNIS COURTS) FROM NORTHEAST CORNER, BUILDING 24 IN BACKGROUND, FACING SOUTHWEST - Roosevelt Base, Tennis Courts, Corner of Reeves Avenue & Pennsylvania Street, Long Beach, Los Angeles County, CA

376

4. View from bridlepath looking northeast showing detail of castiron ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. View from bridlepath looking northeast showing detail of cast-iron gothic motifs in spandrel - Central Park Bridges, Gothic Arch, Spanning bridlepath south of tennis courts at northwest edge of Reservoir, Central Park, New York, New York County, NY

377

17. NORTHEAST CORNER OF BUILDING 345 (ENTRY CONTROL BUILDING) IN ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

17. NORTHEAST CORNER OF BUILDING 345 (ENTRY CONTROL BUILDING) IN STORAGE AREA. - Loring Air Force Base, Weapons Storage Area, Northeastern corner of base at northern end of Maine Road, Limestone, Aroostook County, ME

378

Building 904, oblique view to northeast, 210mm lens Travis ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Building 904, oblique view to northeast, 210mm lens - Travis Air Force Base, Base Spares Warehouse No. 1, Dixon Avenue & W Street, Armed Forces Special Weapons Project Q Area, Fairfield, Solano County, CA

379

1. VIEW OF DUPLEX (FEATURE 9), FACING NORTHEAST. MILL SITE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. VIEW OF DUPLEX (FEATURE 9), FACING NORTHEAST. MILL SITE IS SHOWN IN UPPER RIGHT CORNER OF PHOTOGRAPH. - Copper Canyon Camp of the International Smelting & Refining Company, Duplex, Copper Canyon, Battle Mountain, Lander County, NV

380

OBLIQUE VIEW OF NORTHWEST AND NORTHEAST SIDES OF HYDROELECTRIC POWER ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

OBLIQUE VIEW OF NORTHWEST AND NORTHEAST SIDES OF HYDROELECTRIC POWER HOUSE, OLD BYPASS IN BACKGROUND, VIEW TOWARDS SOUTH - St. Lucie Canal, Lock No. 1, Hydroelectric Power House, St. Lucie, Cross State Canal, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

381

OBLIQUE VIEW OF NORTHEAST AND SOUTHEAST SIDES OF HYDROELECTRIC POWER ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

OBLIQUE VIEW OF NORTHEAST AND SOUTHEAST SIDES OF HYDROELECTRIC POWER HOUSE, VIEW TOWARDS WEST - St. Lucie Canal, Lock No. 1, Hydroelectric Power House, St. Lucie, Cross State Canal, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

382

GENERAL VIEW LOOKING NORTHEAST SHOWING THE SWITCHYARD OF THE WILSON ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

GENERAL VIEW LOOKING NORTHEAST SHOWING THE SWITCHYARD OF THE WILSON DAM HYDROELECTRIC GENERATING PLANT. - Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson Dam Road (Route 133), Muscle Shoals, Colbert County, AL

383

3. EXTERIOR, VIEW TO NORTHEAST, AT NEW SITE (HERITAGE PARK). ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. EXTERIOR, VIEW TO NORTHEAST, AT NEW SITE (HERITAGE PARK). SHERMAN-GILBERT HOUSE AT LEFT; BUSHYLEAD HOUSE IN CENTER; CHRISTIAN HOUSE AT RIGHT - Sherman-Gilbert House, Heritage Park, San Diego, San Diego County, CA

384

1. DETAIL, NORTHEAST VIEW (REMAINDER OF SHAFTTURNING MECHANISM IN FOREGROUND). ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. DETAIL, NORTHEAST VIEW (REMAINDER OF SHAFT-TURNING MECHANISM IN FOREGROUND). - Vanadium Corporation of America (VCA) Naturita Mill, Brick Skimmer Salt Roaster, 3 miles Northwest of Naturita, between Highway 141 & San Miguel River, Naturita, Montrose County, CO

385

Credit BG. Southeast and northeast facades of concrete block structure ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Credit BG. Southeast and northeast facades of concrete block structure built in the late 1960s. It is now used to store miscellaneous equipment - Edwards Air Force Base, North Base, Liquid Oxygen Storage Facility, Second Street, Boron, Kern County, CA

386

10. LOOKING NORTHEAST AT THE LINDE 400 TONS PER DAY ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

10. LOOKING NORTHEAST AT THE LINDE 400 TONS PER DAY LOW PURITY OXYGEN MAKING PLANT IN THE LOW PURITY BULK OXYGEN BUILDING. - U.S. Steel Duquesne Works, Fuel & Utilities Plant, Along Monongahela River, Duquesne, Allegheny County, PA

387

General exterior view to northeast (Building 203 in background right) ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

General exterior view to northeast (Building 203 in background right) - Charlestown Navy Yard, Oxygen Plant, Midway along northern boundary of Charlestown Navy Yard, on Little Mystic Channel, near junction of Eighteenth Street & Fourth Avenue, Boston, Suffolk County, MA

388

9. Boathouse, view south, northeast and northwest sides, with top ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. Boathouse, view south, northeast and northwest sides, with top of lighthouse tower in distance - Squirrel Point Light Station, Off Highway 127, Steen Road to end of Bald Head Road, .8 mile down footpath, Arrowsic, Sagadahoc County, ME

389

4. Light tower and keeper's house, view northeast, southwest side ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. Light tower and keeper's house, view northeast, southwest side - Pumpkin Island Light Station, Pumpkin Island, at northern end of Eggemoggin Beach, off northwest end of Little Deer Island, Eggemoggin, Hancock County, ME

390

2. Keeper's house and light tower, view southwest, northeast and ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. Keeper's house and light tower, view southwest, northeast and northwest sides - Pumpkin Island Light Station, Pumpkin Island, at northern end of Eggemoggin Beach, off northwest end of Little Deer Island, Eggemoggin, Hancock County, ME

391

3. Keeper's house, view northwest, southeast and northeast sides ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. Keeper's house, view northwest, southeast and northeast sides - Pumpkin Island Light Station, Pumpkin Island, at northern end of Eggemoggin Beach, off northwest end of Little Deer Island, Eggemoggin, Hancock County, ME

392

FIRST FLOOR, A view from the northeast corner of the ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

FIRST FLOOR, A view from the northeast corner of the clean room (Room 54) looking southwest - Department of Energy, Mound Facility, Isolated Building (I Building), One Mound Road, Miamisburg, Montgomery County, OH

393

9. DETAIL VIEW OF ROLLING EXPANSION JOINT, NORTHEAST BASE OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. DETAIL VIEW OF ROLLING EXPANSION JOINT, NORTHEAST BASE OF SECOND CLOSED SPANDREL ARCH AT JUNCTION OF OPEN SPANDREL ARCH, LOOKING EAST - Virgin River Bridge, Spanning Virgin River on State Highway 9, Hurricane, Washington County, UT

394

2. DETAIL VIEW OF ANIMAL HOUSE SHOWING NORTHEAST AND SOUTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. DETAIL VIEW OF ANIMAL HOUSE SHOWING NORTHEAST AND SOUTHEAST FACADES AND CONNECTION TO SOUTHEAST FACADE OF STATION GARAGE. VIEW TO WEST. - VA Medical Center, Aspinwall Division, Animal House, 5103 Delafield Avenue, Aspinwall, Allegheny County, PA

395

8. VIEW NORTHEAST, WORKSHOP PIERS Imperial Carbon Black Plant ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. VIEW NORTHEAST, WORKSHOP PIERS - Imperial Carbon Black Plant (Ruin), North side of North Fork of Hughes River along Bunnell Run Road just over 0.5 mile from its intersection with State Route 16, Harrisville, Ritchie County, WV

396

7. VIEW NORTHEAST, COOLING TANK Imperial Carbon Black Plant ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. VIEW NORTHEAST, COOLING TANK - Imperial Carbon Black Plant (Ruin), North side of North Fork of Hughes River along Bunnell Run Road just over 0.5 mile from its intersection with State Route 16, Harrisville, Ritchie County, WV

397

35. OVERHEAD VIEW OF VIVIANNA WORKS ORE BIN LOOKING NORTHEAST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

35. OVERHEAD VIEW OF VIVIANNA WORKS ORE BIN LOOKING NORTHEAST. GENERATOR BUILDING TOP LEFT, OFFICE AND STOREROOM TOP CENTER, ROTARY KILN AND CONDENSER PLATFORM RIGHT. - Mariscal Quicksilver Mine & Reduction Works, Terlingua, Brewster County, TX

398

OVERHEAD VIEW OF VIVIANNA WORKS ORE BIN LOOKING NORTHEAST. GENERATOR ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

OVERHEAD VIEW OF VIVIANNA WORKS ORE BIN LOOKING NORTHEAST. GENERATOR BUILDING TOP LEFT, OFFICE AND STOREROOM TOP CENTER, ROTARY KILN AND CONDENSER PLATFORM RIGHT. - Mariscal Quicksilver Mine & Reduction Works, Terlingua, Brewster County, TX

399

Northeast Regional Cancer Institute's Cancer Surveillance and Risk Factor Program.  

National Technical Information Service (NTIS)

In summary, this project documents the patterns of cancer incidence and mortality in a six-county region of northeast Pennsylvania. Several cancers with unusually high incidence and mortality rates were identified. The prevalence of cancer screening pract...

S. M. Lesko

2007-01-01

400

6. VIEW NORTHEAST, SOUTH FRONT OF BARN (BUILDING 44); WEST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. VIEW NORTHEAST, SOUTH FRONT OF BARN (BUILDING 44); WEST FRONT OF SHED (BUILDING 43) - U.S. Plant Introduction Station, Barn & Shed Buildings, 11601 Old Pond Road, Glenn Dale, Prince George's County, MD

401

EXTERIOR VIEW, LOOKING NORTHEAST, WITH SLAB YARD. AT RIGHT IS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

EXTERIOR VIEW, LOOKING NORTHEAST, WITH SLAB YARD. AT RIGHT IS HOT STRIP MILL BUILDING AND FURNACE. VIEW AT LEFT IS TOWARD CUT TO LENGTH BUILDING. - Central Iron Foundry Site, 1700 Holt Road, Holt, Tuscaloosa County, AL

402

General view of Antenna Array and building complex, looking northeast ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

General view of Antenna Array and building complex, looking northeast - Over-the-Horizon Backscatter Radar Network, Tulelake Radar Site Receive Sector Six Antenna Array, Unnamed Road West of Double Head Road, Tulelake, Siskiyou County, CA

403

VIEW, LOOKING NORTHEAST, OF CHEMISTRY LAB, LOCATED ON MEZZANINE ABOVE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW, LOOKING NORTHEAST, OF CHEMISTRY LAB, LOCATED ON MEZZANINE ABOVE AND EAST OF FLOTATION CELLS. MAIN USE WAS SAMPLE ANALYSIS TO DETERMINE OPTIMUM REAGENT MIXES AND QUANTITIES. - Shenandoah-Dives Mill, 135 County Road 2, Silverton, San Juan County, CO

404

Detection of climate change in the Northeast United States  

EPA Science Inventory

We created a functional representation of Northeast United States climate, defined as Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, and Pennsylvania by using a relatively new method. Climate indexing involves identifying fundamenta...

405

Detection of climate change in the northeast United States-2  

EPA Science Inventory

We created a functional representation of Northeast United States climate, defined as Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, and Pennsylvania by using a relatively new method. Climate indexing involves identifying fundamenta...

406

Credit BG. View looks northeast (48°) over concrete foundation for ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Credit BG. View looks northeast (48°) over concrete foundation for Utility and Paint Shop (Building 4315). Four North Base hangars appear in background - Edwards Air Force Base, North Base, Utility & Paint Shop, Second & E Streets, Boron, Kern County, CA

407

PAINT SHOP, FIRST FLOOR, NORTHEAST CORNER OFFICE INTERIOR, LOOKING WEST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

PAINT SHOP, FIRST FLOOR, NORTHEAST CORNER OFFICE INTERIOR, LOOKING WEST. PROJECTING WALLS WITH INFILLED ARCHES WERE PART OF ONE PAINTING BOOTH IN ORIGINAL STRUCTURE. - Southern Pacific, Sacramento Shops, Paint Shop, 111 I Street, Sacramento, Sacramento County, CA

408

44. PIAZZA, SECOND FLOOR, LOOKING NORTHEAST. AT LEFT IS ORIGINAL ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

44. PIAZZA, SECOND FLOOR, LOOKING NORTHEAST. AT LEFT IS ORIGINAL FOLDING DOOR. AT RIGHT IS ORIGINAL WINDOW (FRAME AND SASH) - Kid-Chandler House, 323 Walnut Street, Philadelphia, Philadelphia County, PA

409

9. NORTHEAST SIDE ELEVATION OF BUILDING 8970 (CREW READINESS BUILDING). ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. NORTHEAST SIDE ELEVATION OF BUILDING 8970 (CREW READINESS BUILDING). - Loring Air Force Base, Alert Area, Southeastern portion of base, east of southern end of runway, Limestone, Aroostook County, ME

410

21. VIEW OF TENNIS COURTS LOOKING NORTHEAST FROM ROOF OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

21. VIEW OF TENNIS COURTS LOOKING NORTHEAST FROM ROOF OF BUILDING 8970 (CREW READINESS BUILDING). - Loring Air Force Base, Alert Area, Southeastern portion of base, east of southern end of runway, Limestone, Aroostook County, ME

411

18. NORTHEAST CORNER OF BUILDING 8990 (MASTER SURVEILLANCE ADN CONTROL ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

18. NORTHEAST CORNER OF BUILDING 8990 (MASTER SURVEILLANCE ADN CONTROL TOWER). - Loring Air Force Base, Alert Area, Southeastern portion of base, east of southern end of runway, Limestone, Aroostook County, ME

412

8. Missile Alert Facility, northeast corner. Lyon Whiteman Air ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. Missile Alert Facility, northeast corner. Lyon - Whiteman Air Force Base, Oscar O-1 Minuteman Missile Alert Facility, Southeast corner of Twelfth & Vendenberg Avenues, Knob Noster, Johnson County, MO

413

22. LOOKING NORTHEAST FROM RECEIVING PLATFORM AT THE REAR (EAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

22. LOOKING NORTHEAST FROM RECEIVING PLATFORM AT THE REAR (EAST SIDE) OF BUILDING, SHOWING SOUTH SIDE OF NORTH WING AND SOUTH SIDE OF FOOD PRESERVATION AND SANITATION LABORATORY (Harms) - Dairy Industry Building, Iowa State University campus, Ames, Story County, IA

414

10. Detail of truss located on top the northeast pier, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

10. Detail of truss located on top the northeast pier, looking southwest. - Bridge No. 4800, Spanning Minnesota River on Trunk Highway 4 between Brown & Nicollet Counties, Sleepy Eye, Brown County, MN

415

31. LOOKING NORTHEAST AT CONSTRUCTION ACTIVITIES ON GLENN CURTIS DRIVE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

31. LOOKING NORTHEAST AT CONSTRUCTION ACTIVITIES ON GLENN CURTIS DRIVE IN OFFICERS QUARTERS. USN PHOTO, APRIL 25, 1941. - Quonset Point Naval Air Station, Roger Williams Way, North Kingstown, Washington County, RI

416

8. JAMESTOWN ISLAND LOOP ROAD, VIEW TO NORTHEAST OF WINE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. JAMESTOWN ISLAND LOOP ROAD, VIEW TO NORTHEAST OF WINE MAKING SIGN (STOP 5). NOTE WICKET MADE OF VINES IN FOREGROUND. - Jamestown Island Loop Road, Jamestown Island, Jamestown, James City County, VA

417

4. View northeast of west (partial) and south elevations. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. View northeast of west (partial) and south elevations. - Natick Research & Development Laboratories, Climatic Chambers Building, U.S. Army Natick Research, Development & Engineering Center (NRDEC), Natick, Middlesex County, MA

418

INTERIOR RADIO BEACON ROOM, LOOKING NORTHEAST. Oregon Inlet Coast ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

INTERIOR RADIO BEACON ROOM, LOOKING NORTHEAST. - Oregon Inlet Coast Guard Station, Northern end of Pea Island, East side of State Road 1257, 0.3 mile North of North Carolina Highway 12, Rodanthe, Dare County, NC

419

3. Oblique view of 213 Division Street, looking northeast, showing ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. Oblique view of 213 Division Street, looking northeast, showing rear (west) facade and south side, 215 Division Street is visible at left and Fairbanks Company appears at right - 213 Division Street (House), Rome, Floyd County, GA

420

2. Oblique view of 215 Division Street, looking northeast, showing ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. Oblique view of 215 Division Street, looking northeast, showing rear (west) facade and south side, 217 Division Street is visible at left and Fairbanks Company appears at right - 215 Division Street (House), Rome, Floyd County, GA

421

4. BUILDING 324, REAR YARD AREA, FROM NEAR NORTHEAST CORNER ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. BUILDING 324, REAR YARD AREA, FROM NEAR NORTHEAST CORNER OF BUILDING 323, LOOKING EAST. - Oakland Naval Supply Center, Commanding Officers Residences, Between E & F Streets, West of Fourth Street, Oakland, Alameda County, CA

422

38. SOUTH END OF OWENS RIVER GORGE LOOKING NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

38. SOUTH END OF OWENS RIVER GORGE LOOKING NORTHEAST - Los Angeles Aqueduct, From Lee Vining Intake (Mammoth Lakes) to Van Norman Reservoir Complex (San Fernando Valley), Los Angeles, Los Angeles County, CA

423

1. Anthony Bley, Photographer September, 1976 GENERAL VIEW FROM NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. Anthony Bley, Photographer September, 1976 GENERAL VIEW FROM NORTHEAST - Dundore Farm, State Route 183 & Church Road vicinity, Penn Township (moved to Brownsville vicinity, Lower Heidelberg Township, Berks County), Mount Pleasant, Berks County, PA

424

Exterior oblique view of the northwest end and northeast side. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Exterior oblique view of the northwest end and northeast side. View facing south-southeast - U.S. Naval Base, Pearl Harbor, Paint Shop & Rigging Loft, Sixth Street between Avenues E & G, Pearl City, Honolulu County, HI

425

9. REINFORCED CONCRETE SLAB ROOF FROM NORTHEAST EDGE, VIEW TOWARDS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. REINFORCED CONCRETE SLAB ROOF FROM NORTHEAST EDGE, VIEW TOWARDS SOUTHWEST. - Glenn L. Martin Company, Titan Missile Test Facilities, Captive Test Stand D-4, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

426

4. FERROCEMENT APRON AT LEFT, CONNECTING TUNNEL, VIEW TOWARD NORTHEAST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. FERROCEMENT APRON AT LEFT, CONNECTING TUNNEL, VIEW TOWARD NORTHEAST. - Glenn L. Martin Company, Titan Missile Test Facilities, Captive Test Stand D-4, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

427

17. Photocopy of a photograph1921 EASTSIDE PLANT LOOKING NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

17. Photocopy of a photograph--1921 EASTSIDE PLANT LOOKING NORTHEAST - American Falls Water, Power & Light Company, Island Power Plant, Snake River, below American Falls Dam, American Falls, Power County, ID

428

11. GENERAL VIEW FROM WEST BANK LOOKING NORTHEAST (negative reversed) ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. GENERAL VIEW FROM WEST BANK LOOKING NORTHEAST (negative reversed) - American Falls Water, Power & Light Company, Island Power Plant, Snake River, below American Falls Dam, American Falls, Power County, ID

429

1. Keeper's house and light tower, view north northeast, southwest ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. Keeper's house and light tower, view north northeast, southwest and southeast sides of house, northwest and southwest sides of tower - Wood Island Light Station, East end of Wood Island, at mouth of Soo River, Biddeford Pool, York County, ME

430

11. SOUTHWEST SIDE OF THE NORTHEAST PHOTO TOWER; WITH CABLES ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. SOUTHWEST SIDE OF THE NORTHEAST PHOTO TOWER; WITH CABLES ENTERING SOUTH SIDE - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

431

8. View of Sterling Creek Marsh looking northeast across the ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. View of Sterling Creek Marsh looking northeast across the berm with the marsh to the left - Richmond Hill Plantation, Sterling Creek Marsh, East of Richmond Hill on Ford Neck Road, Richmond Hill, Bryan County, GA

432

View looking northeast of console table and mirror flanked by ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View looking northeast of console table and mirror flanked by 18th century French chairs in the first floor Reception Hall - Perry Belmont House, 1618 New Hampshire Avenue, NW, Washington, District of Columbia, DC

433

17. VIEW NORTHEAST, WEST TRUSS, DETAIL OF LOWER CHORD AND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

17. VIEW NORTHEAST, WEST TRUSS, DETAIL OF LOWER CHORD AND VERTICAL MEMBER CONNECTION - Osborn Avenue Bridge, Spanning New Jersey Transit Raritan Valley Line at Tuttle Parkway (formerly Osborn Avenue), Westfield, Union County, NJ

434

16. VIEW NORTHEAST, WEST TRUSS, DETAIL OF LOWER CHORD CONNECTIONS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

16. VIEW NORTHEAST, WEST TRUSS, DETAIL OF LOWER CHORD CONNECTIONS AND DECKING - Osborn Avenue Bridge, Spanning New Jersey Transit Raritan Valley Line at Tuttle Parkway (formerly Osborn Avenue), Westfield, Union County, NJ

435

42. FIRST FLOOR, NORTHWEST DINING ROOM, NORTHEAST CORNER, DOORWAY INTO ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

42. FIRST FLOOR, NORTHWEST DINING ROOM, NORTHEAST CORNER, DOORWAY INTO BACK HALL UNDER STAIRWAY AND CABINET FOR PASS-THROUGH INTO PANTRY, DOORS OPEN - Mount Lubentia, 601 Largo Road, Largo, Prince George's County, MD

436

41. FIRST FLOOR, NORTHWEST DINING ROOM, NORTHEAST CORNER, DOORWAY INTO ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

41. FIRST FLOOR, NORTHWEST DINING ROOM, NORTHEAST CORNER, DOORWAY INTO BACK HALL UNDER STAIRWAY AND CABINET FOR PASS-THROUGH INTO PANTRY, DOORS CLOSED - Mount Lubentia, 601 Largo Road, Largo, Prince George's County, MD

437

View of 175 ton hoisthouse from northeast. Hoist operator's cab ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of 175 ton hoist-house from northeast. Hoist operator's cab is in foreground center. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

438

12. VIEW SHOWING BACK SIDE OF GENERATOR ROOM, LOOKING NORTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

12. VIEW SHOWING BACK SIDE OF GENERATOR ROOM, LOOKING NORTHEAST Everett Weinreb, photographer, April 1988 - Mount Gleason Nike Missile Site, Angeles National Forest, South of Soledad Canyon, Sylmar, Los Angeles County, CA

439

4. View to the northeast from the south side of ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. View to the northeast from the south side of 9th Street. Both structures date from 1895. - Lockport Historic District, Bounded by Eighth, Hamilton & Eleventh Streets & Illinois & Michigan Canal, Lockport, Will County, IL

440

Perspective view of east facade from northeast National Home ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Perspective view of east facade from northeast - National Home for Disabled Volunteer Soldiers, Pacific Branch, Main Mental Health Building, 11301 Wilshire Boulevard, West Los Angeles, Los Angeles County, CA

441

2. SOUTH VIEW OF NORTHWEST AND NORTHEAST SIDES (NORTH CORNER). ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. SOUTH VIEW OF NORTHWEST AND NORTHEAST SIDES (NORTH CORNER). NORTHWEST SIDE OF ASSAY OFFICE ON LEFT - Juniata Mill Complex, Mine Office, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

442

2. VIEW WESTSOUTHWEST OF NORTHEAST AND SOUTHEAST SIDES Juniata ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. VIEW WEST-SOUTHWEST OF NORTHEAST AND SOUTHEAST SIDES - Juniata Mill Complex, Mine Camp Building, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

443

2. NORTHEAST VIEW OF SOUTH SIDE WITH ADDITION ON SOUTHWEST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. NORTHEAST VIEW OF SOUTH SIDE WITH ADDITION ON SOUTHWEST - Juniata Mill Complex, Mine & Camp Residence, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

444

3. NORTHEAST VIEW OF SOUTHWEST CORNER (WEST AND SOUTH SIDES) ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. NORTHEAST VIEW OF SOUTHWEST CORNER (WEST AND SOUTH SIDES) - Juniata Mill Complex, Camp Bunk House, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

445

4. VIEW SOUTHSOUTHEAST OF NORTHWEST AND NORTHEAST SIDES OF BUILDING. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. VIEW SOUTH-SOUTHEAST OF NORTHWEST AND NORTHEAST SIDES OF BUILDING. COLLAPSED STRUCTURE IN FOREGROUND - Juniata Mill Complex, Mine Camp Building, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

446

2. NORTHEAST VIEW OF SOUTHWEST CORNER, WEST AND SOUTH SIDES ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. NORTHEAST VIEW OF SOUTHWEST CORNER, WEST AND SOUTH SIDES - Juniata Mill Complex, Mine & Camp Residence, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

447

1. SOUTH VIEW OF NORTHWEST SIDE, WITH NORTHEAST SIDE OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. SOUTH VIEW OF NORTHWEST SIDE, WITH NORTHEAST SIDE OF MINE OFFICE ON RIGHT OF PHOTO - Juniata Mill Complex, Assay Office, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

448

7. CONTEXTUAL VIEW NORTHEAST TOWARDS FEATURES 6 (LEFT) AND 7 ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. CONTEXTUAL VIEW NORTHEAST TOWARDS FEATURES 6 (LEFT) AND 7 (RIGHT) WITHIN MILL COMPLEX. - Juniata Mill Complex, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

449

3. NORTHEAST VIEW OF SOUTH SIDE, WITH ADDITION ON SOUTHEAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. NORTHEAST VIEW OF SOUTH SIDE, WITH ADDITION ON SOUTHEAST SIDE - Juniata Mill Complex, Mine & Camp Residence, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

450

2. NORTHEAST VIEW OF SOUTHWEST CORNER, WEST AND SOUTH SIDES. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. NORTHEAST VIEW OF SOUTHWEST CORNER, WEST AND SOUTH SIDES. PARTIALLY SUNKEN TUB ON LEFT SIDE. - Juniata Mill Complex, Pump House, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

451

1. SOUTHWEST VIEW OF NORTHEAST CORNER, NORTH AND EAST SIDES ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. SOUTHWEST VIEW OF NORTHEAST CORNER, NORTH AND EAST SIDES - Juniata Mill Complex, Mine & Camp Residence, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

452

2. SOUTHSOUTHWEST VIEW OF NORTHEAST CORNER, NORTH AND EAST SIDES ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. SOUTH-SOUTHWEST VIEW OF NORTHEAST CORNER, NORTH AND EAST SIDES - Juniata Mill Complex, Camp Bunk House, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

453

6. INTERIOR OF NORTHEAST ROOM AND MEZZANINE, SOUTHWEST VIEW. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. INTERIOR OF NORTHEAST ROOM AND MEZZANINE, SOUTHWEST VIEW. - Vanadium Corporation of America (VCA) Naturita Mill, Sampling Building & Ore Receiving Platform, 3 miles Northwest of Naturita, between Highway 141 & San Miguel River, Naturita, Montrose County, CO

454

2. VIEW TO NORTHEAST (ORE RECEIVING PLATFORM OUT OF VIEW ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. VIEW TO NORTHEAST (ORE RECEIVING PLATFORM OUT OF VIEW TO RIGHT). - Vanadium Corporation of America (VCA) Naturita Mill, Sampling Building & Ore Receiving Platform, 3 miles Northwest of Naturita, between Highway 141 & San Miguel River, Naturita, Montrose County, CO

455

17. VIEW OF THE DIAMOND MINEYARD LOOKING NORTHEAST. THE DRIES ...  

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17. VIEW OF THE DIAMOND MINEYARD LOOKING NORTHEAST. THE DRIES ARE ON THE LEFT, WITH THE TAR HOUSE, TOILET, AND ROPE CLAMP CLEANING BUILDING TO THE RIGHT - Butte Mineyards, Diamond Mine, Butte, Silver Bow County, MT

456

71. INTERIOR, BUILDING 272 (PLUTONIUM STORAGE BUILDING) LOOKING NORTHEAST INTO ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

71. INTERIOR, BUILDING 272 (PLUTONIUM STORAGE BUILDING) LOOKING NORTHEAST INTO PLUTONIUM STORAGE ROOM SHOWING CUBICLES FOR STORAGE. - Loring Air Force Base, Weapons Storage Area, Northeastern corner of base at northern end of Maine Road, Limestone, Aroostook County, ME

457

SULPHITE BRIDGE FROM DOWNSTREAM, BEARING NORTHEAST 25 DEGREES. THE BRIDGE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

SULPHITE BRIDGE FROM DOWNSTREAM, BEARING NORTHEAST 25 DEGREES. THE BRIDGE ONCE HAD VERTICAL BOARD SIDING BUT VANDALS BURNED IT OFF IN 1981 - Sulphite Railroad Bridge, Former Boston & Maine Railroad (originally Tilton & Franklin Railroad) spanning Winnipesautee River, Franklin, Merrimack County, NH

458

3. VIEW OF NORTHEAST CORNER OF THE BUILDING FROM ABOVE, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. VIEW OF NORTHEAST CORNER OF THE BUILDING FROM ABOVE, APPROXIMATELY AT 10TH. FLOOR LEVEL. VIEW OVERLOOKS CORNER OF FRANKLIN AND 15TH STREET. - Pacific Telephone & Telegraph Company Building, 1519 Franklin Street, Oakland, Alameda County, CA

459

9. VIEW NORTHEAST (32 DEGREES) OF SOUTHWEST FACADE AT RCA ...  

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9. VIEW NORTHEAST (32 DEGREES) OF SOUTHWEST FACADE AT RCA COMMUNICATION REC. STATION. BRACKETS WERE FOR LEADS ON TERMINATION FRAMES THAT WERE REMOVED. - Marconi Radio Sites, Receiving, Point Reyes Station, Marin County, CA

460

8. VIEW TO NORTHEAST; OBLIQUE VIEW OF SOUTH END OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. VIEW TO NORTHEAST; OBLIQUE VIEW OF SOUTH END OF MBE BUILDING (Asano) - Los Angeles Union Passenger Terminal, Mail, Baggage, & Express Building, 800 North Alameda Street, Los Angeles, Los Angeles County, CA

461

Detail showing connection of trusses to counter weights. View northeast ...  

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Detail showing connection of trusses to counter weights. View northeast - New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Lift Bridge, Spanning Fort Point Channel, Boston, Suffolk County, MA

462

1. INTAKE CHANNEL LOOKING NORTHEAST; WATER FROM BEAVER BROOK ENTERS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. INTAKE CHANNEL LOOKING NORTHEAST; WATER FROM BEAVER BROOK ENTERS THE INTAKE CHANNEL HERE. - Hondius Water Line, 1.6 miles Northwest of Park headquarters building & 1 mile Northwest of Beaver Meadows entrance station, Estes Park, Larimer County, CO

463

4. GENERAL VIEW LOOKING NORTHEAST. SOUTH STATION VISIBLE IN BACKGROUND. ...  

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4. GENERAL VIEW LOOKING NORTHEAST. SOUTH STATION VISIBLE IN BACKGROUND. - New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Lift Bridge, Spanning Fort Point Channel, Boston, Suffolk County, MA

464

12. VIEW NORTHEAST, DETAIL OF BRACE ON SOUTH ELEVATION, MILEPOST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

12. VIEW NORTHEAST, DETAIL OF BRACE ON SOUTH ELEVATION, MILEPOST SIGNBOARD TO LEFT OF BRACE - Meeting House Bridge, Spanning Boston & Maine Railroad 0.1 mile east of Biddleford Road, Arundel, York County, ME

465

MAGAZINES 188, ON NORTHEAST SIDE OF HANGAR 110, VIEW FACING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

MAGAZINES 188, ON NORTHEAST SIDE OF HANGAR 110, VIEW FACING WEST-SOUTHWEST. - Naval Air Station Barbers Point, Ready Magazine-1943 Type, Adjacent to Hangars 110 & 111, on or near Midway Street, Ewa, Honolulu County, HI

466

READY MAGAZINE 189, ON NORTHEAST SIDE OF HANGAR 111 VIEW ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

READY MAGAZINE 189, ON NORTHEAST SIDE OF HANGAR 111 VIEW FACING SOUTHEAST. - Naval Air Station Barbers Point, Ready Magazine-1943 Type, Adjacent to Hangars 110 & 111, on or near Midway Street, Ewa, Honolulu County, HI

467

READY MAGAZINE 696. ON NORTHEAST SIDE OF HANGAR 111, VIEW ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

READY MAGAZINE 696. ON NORTHEAST SIDE OF HANGAR 111, VIEW FACING SOUTH-SOUTHEAST. - Naval Air Station Barbers Point, Ready Magazine-1943 Type, Adjacent to Hangars 110 & 111, on or near Midway Street, Ewa, Honolulu County, HI

468

57. POWDER MAGAZINE, DETAIL VIEW OF NORTHEAST FRONT ENTRANCE TO ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

57. POWDER MAGAZINE, DETAIL VIEW OF NORTHEAST FRONT ENTRANCE TO ACESS PASSAGE TO MAGAZINES FROM INTERIOR OF MAGAZINE SHOWING VENTILATION WINDOWS (BARRED) FLANKING ENTRANCE DOOR (OPEN). NOTE ACCESS PASSAGE TO ADJOING MAGAZINE. - Fort Monroe, Fortress, Hampton, Hampton, VA

469

READY MAGAZINE 695, ON NORTHEAST SIDE OF HANGAR 110, VIEW ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

READY MAGAZINE 695, ON NORTHEAST SIDE OF HANGAR 110, VIEW FACING SOUTH-SOUTHEAST. - Naval Air Station Barbers Point, Ready Magazine-1943 Type, Adjacent to Hangars 110 & 111, on or near Midway Street, Ewa, Honolulu County, HI

470

3. EXTERIOR VIEW TO THE NORTHEAST OF A RAILROAD CAR ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. EXTERIOR VIEW TO THE NORTHEAST OF A RAILROAD CAR ON THE TRACKS AND THE PARTS OF AN ENGINE STAND. - Nevada Test Site, Pluto Facility, Area 26, Wahmonie Flats, Cane Spring Road, Mercury, Nye County, NV

471

29. INTERIOR VIEW TO THE NORTHEAST OF CONTROL PANEL AND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

29. INTERIOR VIEW TO THE NORTHEAST OF CONTROL PANEL AND VIEWING WINDOW IN ROOM 105, THE CONTROL ROOM. - Nevada Test Site, Pluto Facility, Disassembly Building, Area 26, Wahmonie Flats, Cane Spring Road, Mercury, Nye County, NV

472

16. INTERIOR VIEW TO THE NORTHEAST OF ROOM 107, THE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

16. INTERIOR VIEW TO THE NORTHEAST OF ROOM 107, THE HOT STORAGE AND PACKAGING ROOM. - Nevada Test Site, Pluto Facility, Disassembly Building, Area 26, Wahmonie Flats, Cane Spring Road, Mercury, Nye County, NV

473

NORTHEAST (REAR) AND SOUTHEAST (SIDE) ELEVATIONS OF BUILDING. view TO ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

NORTHEAST (REAR) AND SOUTHEAST (SIDE) ELEVATIONS OF BUILDING. view TO WEST - Plattsburgh Air Force Base, Demineralized Water Storage Building, Off LeMay Road, outside SAC Alert Area, Plattsburgh, Clinton County, NY

474

NORTHEAST (REAR) AND NORTHWEST (SIDE) ELEVATIONS OF BUILDING. VIEW TO ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

NORTHEAST (REAR) AND NORTHWEST (SIDE) ELEVATIONS OF BUILDING. VIEW TO SOUTH - Plattsburgh Air Force Base, Demineralized Water Storage Building, Off LeMay Road, outside SAC Alert Area, Plattsburgh, Clinton County, NY

475

14. September 20, 1950, source not known VIEW NORTHEAST, SOUTH ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

14. September 20, 1950, source not known VIEW NORTHEAST, SOUTH ELEVATIONS, MECHANICS SAVINGS BANK AND ADJOINING BUILDING TO EAST - Mechanics Savings Bank Building, 80 Pearl Street, Hartford, Hartford County, CT

476

6. DECK #4 TOPSIDE FROM NORTHEAST CORNER END PIECE FOR ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. DECK #4 TOPSIDE FROM NORTHEAST CORNER END PIECE FOR ROBOTIC ARM FOR ANCHORING ASTRONAUT FOR MECHANICAL WORK. - Marshall Space Flight Center, Neutral Buoyancy Simulator Facility, Rideout Road, Huntsville, Madison County, AL

477

PERSPECTIVE VIEW LOOKING NORTHEAST AT THE TEST STAND, NOTE THE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

PERSPECTIVE VIEW LOOKING NORTHEAST AT THE TEST STAND, NOTE THE SERVICE AND SUPPORT BUILDINGS TO THE LEFT AND RIGHT OF THE TEST STAND. - Marshall Space Flight Center, Saturn Propulsion & Structural Test Facility, East Test Area, Huntsville, Madison County, AL

478

3. VIEW NORTHEAST, SOUTH FRONT OF SOIL CONSERVATION SERVICE CLUSTER ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. VIEW NORTHEAST, SOUTH FRONT OF SOIL CONSERVATION SERVICE CLUSTER (BUILDING 25) - U.S. Plant Introduction Station, Soil Conservation Service Cluster, 11601 Old Pond Road, Glenn Dale, Prince George's County, MD

479

10. June 25, 1963 SEED BUILDING UNDER CONSTRUCTION Looking northeast ...  

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10. June 25, 1963 SEED BUILDING UNDER CONSTRUCTION Looking northeast showing west wall of Machinery Shed - Tucson Plant Material Center, Machinery Shed, 3241 North Romero Road, Tucson, Pima County, AZ

480

DETAIL, NORTHEAST POST SUPPORTING SHED PORCH ROOF ON NORTH FACADE; ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

DETAIL, NORTHEAST POST SUPPORTING SHED PORCH ROOF ON NORTH FACADE; VIEW TO EAST - Fort Bragg, Noncommissioned Officers' Service Club, Guest House Building, South of Butner Road, Fayetteville, Cumberland County, NC

481

29. Another view looking Northeast closer to Huber Breaker (left), ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

29. Another view looking Northeast closer to Huber Breaker (left), Retail Coal Storage Bins (Center), Power Plant (right) Photograph taken by George Harven - Huber Coal Breaker, 101 South Main Street, Ashley, Luzerne County, PA

482

28. View looking Northeast, Huber Breaker (left), Retail Coal Storage ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

28. View looking Northeast, Huber Breaker (left), Retail Coal Storage Bins (Center) Power Plant (right) Photograph taken by George Harven - Huber Coal Breaker, 101 South Main Street, Ashley, Luzerne County, PA

483

1. View looking Northeast of Huber Breaker (left), Retail Coal ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. View looking Northeast of Huber Breaker (left), Retail Coal Storage Bins (center), and Power Station (right foreground) Photograph taken by George Harven - Huber Coal Breaker, Breaker, 101 South Main Street, Ashley, Luzerne County, PA

484

VIEW OF WEST SIDE AND SOUTH FRONT (PARTIAL), FACING NORTHEAST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW OF WEST SIDE AND SOUTH FRONT (PARTIAL), FACING NORTHEAST. - Douglas Aircraft Company Long Beach Plant, Aircraft Final Assembly Building, 3855 Lakewood Boulevard, Long Beach, Los Angeles County, CA

485

43. VIEW TO NORTHEAST; MBE BUILDING, THIRD FLOOR, CONDUCTORS' LOCKER ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

43. VIEW TO NORTHEAST; MBE BUILDING, THIRD FLOOR, CONDUCTORS' LOCKER ROOM INTERIOR (Dobson) - Los Angeles Union Passenger Terminal, Mail, Baggage, & Express Building, 800 North Alameda Street, Los Angeles, Los Angeles County, CA

486

39. VIEW TO NORTHEAST; WEST FRONT MBE BUILDING, FIRST FLOOR, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

39. VIEW TO NORTHEAST; WEST FRONT MBE BUILDING, FIRST FLOOR, FRED HARVEY NEWSSTAND STOREROOM (AREA BURNED BY VANDALS) (Dobson) - Los Angeles Union Passenger Terminal, Mail, Baggage, & Express Building, 800 North Alameda Street, Los Angeles, Los Angeles County, CA

487

20. VIEW TO NORTHEAST; WEST FRONT MBE BUILDING, FIRST FLOOR ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

20. VIEW TO NORTHEAST; WEST FRONT MBE BUILDING, FIRST FLOOR ENTRANCE SHOWING DECORATIVE DETAIL (Dobson) - Los Angeles Union Passenger Terminal, Mail, Baggage, & Express Building, 800 North Alameda Street, Los Angeles, Los Angeles County, CA

488

Oblique view, showing southeast and northeast sides and attached Building ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Oblique view, showing southeast and northeast sides and attached Building 111 (Fire Station) left, camera facing northwest - Golden Gate International Exposition, Palace of Fine and Decorative Arts & Annex, California Avenue, Treasure Island, San Francisco, San Francisco County, CA

489

Detail of northwest at northeast corner, camera facing southwest ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Detail of northwest at northeast corner, camera facing southwest - Golden Gate International Exposition, Palace of Fine and Decorative Arts & Annex, California Avenue, Treasure Island, San Francisco, San Francisco County, CA

490

20. Detail, of tower, northeast facade, showing condition of skirt ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

20. Detail, of tower, northeast facade, showing condition of skirt roof, windows, truncated chimney, dentil course, view to northwest from lift-bed truck, 65mm lens. - Southern Pacific Depot, 559 El Camino Real, San Carlos, San Mateo County, CA

491

22. INTERIOR, FIRST FLOOR, EAST SECTION, NORTHEAST ROOM, NORTHWEST CORNER ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

22. INTERIOR, FIRST FLOOR, EAST SECTION, NORTHEAST ROOM, NORTHWEST CORNER (NOTE EXPOSED BRICK NOGGING) - Peter Burr House, Vicinity of State Route 9 & Ridge Road, Shenandoah Junction, Jefferson County, WV