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Now showing items 141-160 of 25192

SIGNATURES OF RIFT ENVIRONMENT IN THE PRODUCTION OF GARNET-AMPHIBOLITES AND ECLOGITES FROM TSO-MORARI REGION, LADAKH, INDIA: A GEOCHEMICAL STUDY

Rameshwar Rao D.; Hakim Rai (2006)

The geochemistry of eclogites and garnet-amphibolites from Tso-Morari region, Ladakh, India has been investigated to characterize their protoliths on the basis of immobile elements, especially trace elements including REE. ...
DUNK, DUNKLESS AND RE-DUNK TECTONICS: A MODEL FOR METAMORPHISM, LACK OF METAMORPHISM, AND REPEATED METAMORPHISM OF HP/UHP TERRANES

Brueckner H.K. (2006)

High-pressure metamorphic terranes form when slivers of continental crust are pulled into the mantle by previously subducted oceanic lithosphere. Old, cold lithosphere subducts into the mantle at steep angles, dragging ...
LITHOSPHERIC STRUCTURE OF THE TESZ IN POLAND BASED ON MODERN SEISMIC EXPERIMENTS

Guterch A.; Grad M. (2006)

This paper presents the results of seismic investigations on the structure of the lithosphere in the area of the Trans-European Suture Zone (TESZ) in Poland that is located between the southwestern margin of the East ...
GEODETIC OBSERVATIONS AND MODELING OF MAGMATIC INFLATION AT THE THREE SISTERS VOLCANIC CENTER, CENTRAL OREGON CASCADE RANGE, USA

Dzurisin D.; Lisowski M.; Poland M.P.; Endo E.T.; Wicks C.W. (2006)

Tumescence at the Three Sisters volcanic center began sometime between summer 1996 and summer 1998 and was discovered in April 2001 using interferometric synthetic aperture radar (InSAR). Swelling is centered about 5 km ...
THE FEDORIVKA LAYERED INTRUSION (KOROSTEN PLUTON, UKRAINE): AN EXAMPLE OF HIGHLY DIFFERENTIATED FERROBASALTIC EVOLUTION

Duchesne J.C.; Charlier B.; Shumlyanskyy L. (2006)

This study documents the petrography and whole-rock major and trace element geochemistry of 38 samples mainly from a drill core through the entire Fedorivka layered intrusion (Korosten Pluton), as well as mineral compositions ...
INFLUENCE OF OXIDABILITY OF CARBONIFEROUS COALS FROM THE DOBRUDJA FOREDEEP ON VITRINITE REFLECTANCE

Ivanova A.V.; Zaitseva L.B. (2006)

Importance of the study of the influence of coal oxidability on vitrinite reflectance (VR) as a criterion of the quality of coals and indicator of paleogeothermal regime is shown. Overview of relevant concepts demonstrates ...
CORRELATION OF PLEISTOCENE DEPOSITS IN THE AREA BETWEEN THE BALTIC AND BLACK SEA, CENTRAL EUROPE

Lindner L.; Bogutsky A.; Gozhik P.; Marks L.; Łanczont M.; Wojtanowicz J. (2006)

The distribution, age and correlation of Pleistocene sediments (1.806-0.01 Ma) is presented for an about 1200 kni long geologic cross-section that extends from the Baltic Sea to the Black Sea and crosses the eastern part ...
HIGH-LATITUDE COLD-BASED GLACIAL DEPOSITS ON MARS: MULTIPLE SUPERPOSED DROP MORAINES IN A CRATER INTERIOR AT 70°N LATITUDE

Garvin J.B.; Head J.W.; Kreslavsky M.A.; Marchant D.R. (2006)

An impact crater 26.8 km in diameter, located in the northern lowlands (70.32°N, 266.45°E) at the base of the flanking slopes of the shield volcano Alba Patera, is characterized by highly unusual deposits on its southeastern ...
TEM STUDIES AND THE SHOCK HISTORY OF A "MYSTERITE" INCLUSION FROM THE KRYMKA LL CHONDRITE

Weber I.; Stephan T.; Jessberger E.K.; Semenenko V.P. (2006)

The microstructure and composition of the matrix of one carbonaceous inclusion (K1) in the Krymka LL3.1 chondrite were studied using transmission electron microscopy (TEM). K1 has previously shown an enigmatic nature and ...
COMPOSITION AND GENESIS OF PRECAMBRIAN METALLIFEROUS CONGLOMERATES

Mikhailov V.A. (2006)

Precambrian metalliferous conglomerates are the most important source of gold, uranium, and other metals. They concentrate no less than 30% of world gold reserves and provide 30-50% of world gold production. The metalliferous ...
ASSESSING THE EXTENT OF INDUCED LEAKAGE TO AN URBAN AQUIFER USING ENVIRONMENTAL TRACERS: AN EXAMPLE FROM BISHKEK, CAPITAL OF KYRGYZSTAN, CENTRAL ASIA

Morris B.L.; Darling W.G.; Gooddy D.C.; Neumann I.; Litvak R.G.; Nemaltseva E.J.; Poddubnaia I. (2006)

A groundwater residence time study of the deep fluvioglacial aquifer supplying Bishkek, capital of Kyrgyzstan, has found evidence of deep infiltration of recent recharge both in the main periurban wellfield and below the ...
DIRECT EVIDENCE OF FLUID MIXING IN THE FORMATION OF STRATABOUND PB-ZN-BA-F MINERALISATION IN THE ALSTON BLOCK, NORTH PENNINE OREFIELD (ENGLAND)

Bouch J.E.; Naden J.; McKervey J.A.; Benham A.J.; Shepherd T.J.; Young B.; Sloane H.J. (2006)

The North Pennine Orefield Alston Block has produced approximately 4 Mt Pb, 0.3 Mt Zn, 2.1 Mt fluorite, 1.5 Mt barite, 1 Mt witherite, plus a substantial amount of iron ore and copper ore from predominantly vein-hosted ...
THE AGUABLANCA NI-(CU) SULFIDE DEPOSIT, SW SPAIN: GEOLOGIC AND GEOCHEMICAL CONTROLS AND THE RELATIONSHIP WITH A MIDCRUSTAL LAYERED MAFIC COMPLEX

Tornos F.; Galindo C.; Casquet C.; Rodríguez Pevida L.; Martínez C.; Martinez E.; Velasco F.; Iriondo A. (2006)

The Aguablanca Ni-(Cu) sulfide deposit is hosted by a breccia pipe within a gabbro-diorite pluton. The deposit probably formed due to the disruption of a partially crystallized layered mafic complex at about 12-19 km depth ...
LAYERED MAFIC SILL COMPLEX BENEATH THE EASTERN SNAKE RIVER PLAIN: EVIDENCE FROM CYCLIC GEOCHEMICAL VARIATIONS IN BASALT

Shervais J.W.; Vetter S.K.; Hanan B.B. (2006)

The eastern Snake River Plain in southern Idaho, western United States, is characterized by 1-2 km of Pleistocene to late Pliocene basalt overlying rhyolite caldera complexes. Cyclic variations in the chemical composition ...
ERUPTIVE HISTORY AND GEOCHRONOLOGY OF MOUNT MAZAMA AND THE CRATER LAKE REGION, OREGON

Bacon C.R.; Lanphere M.A. (2006)

Geologic mapping, K-Ar, and 40Ar/39Ar age determinations, supplemented by paleomagnetic measurements and geochemical data, are used to quantify the Quaternary volcanic history of the Crater Lake region in order to define ...
THE ELECTRIC FIELD IN NORTHERN ENGLAND AND SOUTHERN SCOTLAND: IMPLICATIONS FOR GEOMAGNETICALLY INDUCED CURRENTS

Mckay A.J.; Whaler K.A. (2006)

Magnetotelluric (MT) data, in the form of MT tensors, are used to estimate directly the size and spatial distribution of the electric field in northern England and southern Scotland with the aim of predicting the flow of ...
PLANE-WAVE DEPTH MIGRATION

Stoffa P.L.; Sen M.K.; Seifoullaev R.K.; Pestana R.C.; Fokkema J.T. (2006)

We present fast and efficient plane-wave migration methods for densely sampled seismic data in both the source and receiver domains. The methods are based on slant stacking over both shot and receiver positions (or offsets) ...
A TENTATIVE 2D THERMAL MODEL OF CENTRAL INDIA ACROSS THE NARMADA-SON LINEAMENT (NSL)

Rai S.N.; Thiagarajan S. (2006)

This work deals with 2D thermal modeling in order to delineate the crustal thermal structure of central India along two Deep Seismic Sounding (DSS) profiles, namely Khajuriakalan-Pulgaon and Ujjan-Mahan, traversing the ...
LATE WENLOCK BIOSTRATIGRAPHY AND THE PRISTIOGRAPTUS VIRBALENSIS GROUP (GRAPTOLITHINA) IN LITHUANIA AND THE HOLY CROSS MOUNTAINS

Radzevičius S. (2006)

Graptolites from Lithuania and the Holy Cross Mountains comprise a succession of the lundgreni, parvus (except for the Holy Cross Mts.), nassa, praedeubeli, deubeli and ludensis biozones of the upper Wenlock, the parvus, ...
PROTOLITH OF ECLOGITES IN THE NORTH QAIDAM AND ALTUN UHP TERRANE, NW CHINA: EARLIER OCEANIC CRUST?

Yang J.; Wu C.; Zhang J.; Shi R.; Meng F.; Wooden J.; Yang H.-Y. (2006)

An early Paleozoic ultrahigh pressure metamorphic belt occurs in the north Qaidam-Altun mountains and was offset about 400 km southwestward by the Altyn Tagh strike-slip fault. Eclogites in the belt consist of major basaltic ...

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