Геология России: Recent submissions

Now showing items 841-860 of 43490

THE CHEMISTRY OF SPRING WATERS AND FUMAROLIC GASES ENCIRCLING SANTA MARíA VOLCANO, GUATEMALA: INSIGHTS INTO REGIONAL HYDROTHERMAL ACTIVITY AND IMPLICATIONS FOR VOLCANO MONITORING

Walker J.A.; Templeton S.; Cameron B.I. (2006)

Springs encircling Santa María volcano in Guatemala generally contain bicarbonate waters. Bicarbonate waters southwest of the persistently active Santiaguito lava dome are characterized by high Mg/Ca. Other springs contain ...
STRUCTURAL STYLE AND CRUSTAL ARCHITECTURE OF THE TASMANIDES OF EASTERN AUSTRALIA: EXAMPLE OF A COMPOSITE ACCRETIONARY OROGEN

Gray D.R.; Foster D.A.; Korsch R.J.; Spaggiari C.V. (2006)

Deformation in accretionary orogens, such as the eastern Australian Tasmanides, is clearly partitioned either as thin-skinned thrusting or thick-skinned faulting, with structural style dependent on the nature and stratal ...
A REEVALUATION OF ARCHEAN INTRACRATONIC TERRANE BOUNDARIES ON THE KAAPVAAL CRATON, SOUTH AFRICA: COLLISIONAL SUTURE ZONES?

Anhaeusser C.R. (2006)

Increasing support for the adoption of plate-tectonic processes to account for Archean geotectonic events has led to the reevaluation of selected terranes in southern Africa in order to determine the viability of plate ...
LARGE-VOLUME VOLCANIC EDIFI CE FAILURES IN CENTRAL AMERICA AND ASSOCIATED HAZARDS

Siebert L.; Alvarado G.E.; Vallance J.W.; Van Wyk De Vries B. (2006)

Edifi ce-collapse phenomena have, to date, received relatively little attention in Central America, although ̃40 major collapse events (ε0.1 km3) from about two dozen volcanoes are known or inferred in this volcanic arc. ...
DIVERSE VOLCANISM IN SOUTHEASTERN GUATEMALA: THE ROLE OF CRUSTAL CONTAMINATION

Cameron B.I.; Walker J.A. (2006)

In the Central American arc, southeastern Guatemala hosts the most diverse volcanism. Large stratovolcanoes at the volcanic front (VF) form as a result of subduction of the oceanic Cocos plate beneath the continental ...
GEOCHEMISTRY OF OPHIOLITIC ROCKS ASSOCIATED WITH THE WESTERN PART OF THE ELK OUTLIER OF THE WESTERN KLAMATH TERRANE, SOUTHWESTERN OREGON

Giaramita M.J.; Harper G.D. (2006)

A newly discovered dike complex and serpentinite-matrix mélange may represent basement for the Upper Jurassic Galice Formation in the Elk outlier of the western Klamath terrane, which lies far to the west of the Klamath ...
USING IN SITU-PRODUCED 10BE TO QUANTIFY ACTIVE TECTONICS IN THE GURVAN BOGD MOUNTAIN RANGE (GOBI-ALTAY, MONGOLIA)

Ritz J.-F.; Vassallo R.; Braucher R.; Bourlés D.L.; Brown E.T.; Carretier S. (2006)

This paper presents an updated synthesis of morphotectonic studies that quantify active tectonics along the Gurvan Bogd mountain range in the Mongolian Gobi-Altay, the site of one of the strongest historic intracontinental ...
ANTARCTIC CLIMATE AT THE EOCENE/OLIGOCENE BOUNDARY - CLIMATE MODEL SENSITIVITY TO HIGH LATITUDE VEGETATION TYPE AND COMPARISONS WITH THE PALAEOBOTANICAL RECORD

Thorn V.C.; DeConto R. (2006)

Simulated climate for the Antarctic continent using the GENESIS (Version 2.1) Global Climate Model with 34 Ma boundary conditions is shown to be highly sensitive to polar vegetation type. Six experiments were run using ...
THE HANCOCK COUNTY TETRAPOD LOCALITY: A NEW MISSISSIPPIAN (CHESTERIAN) WETLANDS FAUNA FROM WESTERN KENTUCKY (USA)

Garcia W.J.; Storrs G.W.; Greb S.F. (2006)

The earliest tetrapods are known from a handful of Upper Devonian and Lower Carboniferous localities in Europe, North America, and Australia. All Upper Devonian sites and virtually all Early Carboniferous faunas are regarded ...
SPELEOTHEM PALEOLUMINESCENCE-THE PAST TWENTY YEARS

Shopov Y.Y. (2006)

This paper reviews the development and recent advances in the uses of speleothem luminescence as a proxy record of environmental change. Speleothem paleoluminescence records have the potential to provide a variety of ...
APPLICATIONS OF COSMOGENIC NUCLIDES TO LAURENTIDE ICE SHEET HISTORY AND DYNAMICS

Briner J.P.; Gosse J.C.; Bierman P.R. (2006)

Ice sheets play a fundamental role within Earth's climate system and in shaping landscapes. Despite extensive research, the maximum extent and basal dynamics of the Laurentide Ice Sheet (LIS) during the last glacial cycle ...
HAZARD ZONING FOR BALLISTIC IMPACT DURING VOLCANIC EXPLOSIONS AT VOLCÁN DE FUEGO DE COLIMA (MÉXICO)

Alatorre-Ibargüengoitia M.A.; Delgado-Granados H.; Farraz-Montes I.A. (2006)

Volcanic explosions expel fragments following ballistic trajectories. The volcanic ballistic projectiles represent a hazard due to their high velocities and temperatures. They may affect people, ecology, infrastructure, ...
PETROLOGIC CHARACTERIZATION OF GUATEMALAN LAWSONITE ECLOGITE: ECLOGITIZATION OF SUBDUCTED OCEANIC CRUST IN A COLD SUBDUCTION ZONE

Tsujimori T.; Liou J.G.; Sisson V.B.; Harlow G.E.; Sorensen S.S. (2006)

Early Cretaceous lawsonite eclogites and related high-pressure rocks occur as tectonic inclusions within serpentinite mélange south of the Motagua fault zone, Guatemala. Petrologic and microtextural analyses of mafic ...
COLLISIONAL AND POSTCOLLISIONAL TECTONICS OF THE APENNINIC-MAGHREBIAN OROGEN (SOUTHERN ITALY)

Lentini F.; Carbone S.; Guarnieri P. (2006)

Geological analysis of geophysical data obtained by the interpretation of crustal profiles indicates that in the central Mediterranean region the following structural domains can be distinguished: the foreland domains, an ...
CENOZOIC TECTONIC EVOLUTION OF THE EASTERN RHODOPE MASSIF (BULGARIA): BASEMENT STRUCTURE AND KINEMATICS OF SYN-TO POSTCOLLISIONAL EXTENSIONAL DEFORMATION

Bonev N. (2006)

This article contributes to a better understanding of the structure and extensional tectonics in the eastern part of the Rhodope massif. The eastern Rhodope high-grade metamorphic basement includes a lower and an upper ...
RECUPERATED OSL DATING OF FINE-GRAINED QUARTZ IN CHINESE LOESS

Wang X.L.; Lu Y.C.; Wintle A.G. (2006)

The thermally transferred optically stimulated luminescence (OSL) signal from fine-grained quartz extracted from Chinese loess can be separated into two components, the recuperated and the basic transferred OSL signal. The ...
ORIGIN AND DISTRIBUTION OF BIOMARKERS IN THE SULPHUR RICH UTRILLAS COAL BASIN - TERUEL MINING DISTRICT - SPAIN

Olivella M.A.; Gorchs R.; de las Heras F.X.C. (2006)

The Utrillas coal facies are located in the Maestrazgo basin in NE Spain. This mining district of Teruel contains sub-bituminous deposits from the Middle Albian (Lower Cretaceous 105 Ma) in areas near a delta estuary with ...
ORIGIN OF HYDROTHERMAL FLUIDS AND GOLD MINERALIZATION ASSOCIATED WITH THE VENTERSDORP CONTACT REEF, WITWATERSRAND BASIN, SOUTH AFRICA: CONSTRAINTS FROM S, O, AND H ISOTOPES

Zhao B.; Robb L.J.; Harris C.; Jordaan L.J. (2006)

The Ventersdorp Contact Reef, one of the major gold-bearing conglomerate horizons in the Witwatersrand Basin, occurs as a distinct horizon between the overlying Klipriviersberg Group lavas (2714 Ma) and the underlying ...
PRECURSORY PHENOMENA ASSOCIATED WITH THE 1999 CHI-CHI EARTHQUAKE IN TAIWAN AS IDENTIFIED UNDER THE ISTEP PROGRAM

Tsai Y.-B.; Ma K.-F.; Yen H.-Y.; Lee C.-P.; Liu J.-Y.; Chen K.-S.; Chen Y.-I. (2006)

This paper presents a brief summary of several types of precursors in the lithosphere, atmosphere and ionosphere that have been positively identified in relation to the 20 September 1999 Mw 7.6 Chi-Chi earthquake and its ...
HYDROLYTIC WEAKENING OF JADEITE IN UHP JADEITE-QUARTZITES FROM THE DABIE MOUNTAINS, EASTERN CHINA

Su W.; Ye K.; Liu J. (2006)

Deformed jadeite grains in the UHP jadeite-quartzites from the Dabie Mountains, eastern China show evidence (by transmission electron microscopy, TEM) of plastic deformation: free dislocations, dislocation loops, dislocation ...

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