Геология России: Recent submissions

Now showing items 721-740 of 43490

DEVELOPMENT OF THE SOUTHERN EASTERN CORDILLERA, NW ARGENTINA, CONSTRAINED BY APATITE FISSION TRACK THERMOCHRONOLOGY: FROM EARLY CRETACEOUS EXTENSION TO MIDDLE MIOCENE SHORTENING

Deeken A.; Sobel E.R.; Strecker M.R.; Coutand I.; Haschke M.; Riller U. (2006)

For the Puna Plateau and Eastern Cordillera of NW Argentina, the temporal and spatial pattern of deformation and surface uplift remain poorly constrained. Analysis of completely and partially reset apatite fission track ...
MECHANISMS AND DURATION OF NON-TECTONICALLY ASSISTED MAGMA EMPLACEMENT IN THE UPPER CRUST: THE BLACK MESA PLUTON, HENRY MOUNTAINS, UTAH

de Saint-Blanquat M.; Habert G.; Gleizes G.; Horsman E.; Tikoff B.; Morgan S.S.; Launeau P. (2006)

A new study of Black Mesa pluton (Henry Mountains, Colorado Plateau, Utah, USA) indicates that it is a classic example of a small upper-crustal pluton assembled over a few years by incremental amalgamation of discrete magma ...
NEW PALAEONTOLOGICAL ASSEMBLAGE, SEDIMENTOLOGICAL AND CHRONOLOGICAL DATA FROM THE PLEISTOCENE MA U'OI CAVE (NORTHERN VIETNAM)

Bacon A.-M.; Demeter F.; Roussé S.; Duringer P.; Long V.T.; Thuy N.K.; Huong N.T.M.; Antoine P.-O.; Mai B.T.; Dodo Y.; Matsumura H.; Schuster M.; Anezaki T. (2006)

This paper describes recent material gathered during the second fieldwork at Ma U'Oi in November 2002 by a Vietnamese-French-Japanese team. The Ma U'Oi cave, located in the province of Hoà Binh (60 km SW from Hanoi), ...
PALEOMAGNETIC RECORD OF AFRICA AND SOUTH AMERICA FOR THE 1200-500 MA INTERVAL, AND EVALUATION OF RODINIA AND GONDWANA ASSEMBLIES

Tohver E.; D'Agrella-Filho M.S.; Trindade R.I.F. (2006)

At least two supercontinents - Rodinia and Gondwana - have been proposed for the 1200-500 Ma time interval on the basis of stratigraphic, geochronological and paleomagnetic grounds. Although the exact configuration of ...
TRIASSIC EVOLUTION OF THE YANGTZE PLATFORM IN GUIZHOU PROVINCE, PEOPLE'S REPUBLIC OF CHINA

Enos P.; Minzoni M.; Montgomery P.; Lehrmann D.J.; Jiayong W.; Jiafei X.; Youyi Y.; Chaikin D.H.; Berry A.K. (2006)

Deposition of shallow - water carbonates on the vast Yangtze Platform of south China spanned the late Proterozoic through Middle Triassic, accumulating as much as 4000 m during the Early and Middle Triassic. Deeper-water ...
LIMITED ICE-SHEET EROSION AND COMPLEX EXPOSURE HISTORIES DERIVED FROM IN SITU COSMOGENIC 10BE, 26AL, AND 14C ON BAFFIN ISLAND, ARCTIC CANADA

Miller G.H.; Briner J.P.; Lifton N.A.; Finkel R.C. (2006)

Discordant cosmogenic nuclide exposure ages derived from 10Be, 26Al, and 14C extracted from quartz in rocky summits along the eastern rim of the central Baffin Island plateau provide constraints on the efficiency of erosion ...
THE 3.466 GA "KITTY'S GAP CHERT," AN EARLY ARCHEAN MICROBIAL ECOSYSTEM

Westall F.; De Vries S.T.; Nijman W.; Rouchon V.; Orberger B.; Pearson V.; Watson J.; Verchovsky A.; Wright I.; Rouzaud J.-N.; Marchesini D.; Severine A. (2006)

A multidisciplinary study of silicified volcanoclastic, near-shore deposits from the 3.446 Ga "Kitty's Gap Chert," Warrawoona Group, Pilbara, reveals that they contain a wealth of carbonaceous microbial fossil remains. The ...
EVOLUTION AND IMPORTANCE OF WETLANDS IN EARTH HISTORY

Greb S.F.; DiMichele W.A.; Gastaldo R.A. (2006)

The fossil record of wetlands documents unique and long-persistent fl oras and faunas with wetland habitats spawning or at least preserving novel evolutionary characteristics and, at other times, acting as refugia. In ...
THE GEOCHEMISTRY OF RIVERS IN TECTONICALLY ACTIVE AREAS OF TAIWAN AND NEW ZEALAND

Carey A.E.; Kao S.J.; Hicks D.M.; Nezat C.A.; Lyons W.B. (2006)

The geochemistry of river water, river sediments, and suspended matter in three mountainous watersheds in New Zealand and Taiwan is used to determine chemical erosion yields in regions of rapid tectonic uplift. Suspended ...
EDIACARAN CYCLOMEDUSOIDS AND THE PALEOGEOGRAPHIC SETTING OF THE NEOPROTEROZOIC-EARLY PALEOZOIC YREKA AND TRINITY TERRANES, EASTERN KLAMATH MOUNTAINS, CALIFORNIA

Lindsley-Griffin N.; Griffin J.R.; Sivers E.A.; Bruckno B.; Tozer M.K.; Farmer J.D. (2006)

Newly recognized fossil cyclomedusoids from the Yreka terrane include Ediacaria sp. and Beltanella sp. They are typical of the Ediacaran fossil assemblage, range from 640 to 575 Ma, and thus are latest Neoproterozoic ...
MAGNETIC PROPERTIES OF LAKE LISAN AND HOLOCENE DEAD SEA SEDIMENTS AND THE FI DELITY OF CHEMICAL AND DETRITAL REMANENT MAGNETIZATION

Ron H.; Nowaczyk N.R.; Frank U.; Marco S.; McWilliams M.O. (2006)

We have studied the magnetic properties of wet and dry late Pleistocene Lake Lisan sediments and the Holocene Dead Sea sediments. Our initial prediction was that the properties of both would be quite similar, because they ...
LONG-TERM EVOLUTION OF TECTONIC LAKES: CLIMATIC CONTROLS ON THE DEVELOPMENT OF INTERNALLY DRAINED BASINS

Garcia-Castellanos D. (2006)

A quantitative model is proposed for the long-term evolution of lakes and internally drained basins resulting from tectonic vertical motions, sediment infill, outlet erosion, and climatic regime. The model accounts for the ...
THE SAN PEDRO-CERRO GRANDE VOLCANIC COMPLEX (NAYARIT, MÉXICO): INFERENCES ON VOLCANOLOGY AND MAGMA EVOLUTION

Petrone C.M.; Francalanci L.; Conticelli S.; Ferrari L.; Schaaf P. (2006)

This study focuses on two issues that are still a matter of debate in subduction zones, particularly in western México: (1) the close association within the same volcanic complex of typical amphibole-free andesites to ...
CONTRASTING SOURCE COMPONENTS OF CLASTIC METASEDIMENTARY ROCKS IN THE LOWERMOST FORMATIONS OF THE BARBERTON GREENSTONE BELT

Dziggel A.; Stevens G.; Poujol M.; Armstrong R.A. (2006)

Rare occurrences of clastic metasedimentary rocks within the lowermost stratigraphic units of the Barberton greenstone belt represent one of the few lines of evidence that argue for the existence of some component of evolved ...
ESTIMATES OF ATMOSPHERIC CO2 LEVELS DURING THE MID-TURONIAN DERIVED FROM STABLE ISOTOPE COMPOSITION OF PALEOSOL CALCITE FROM ISRAEL

Sandler A. (2006)

The carbon and oxygen isotopic composition of pedogenic calcite from mid-Turonian paleosols in Israel was analyzed to evaluate paleoenvironmental conditions and calculate paleoatmospheric pCO2. The central area of Israel ...
PETROLOGY AND GEOCHEMISTRY OF THE MIDDLE JURASSIC IRONSIDE MOUNTAIN BATHOLITH: EVOLUTION OF POTASSIC MAGMAS IN A PRIMITIVE ARC SETTING

Barnes C.G.; Mars E.V.; Swapp S.; Frost C.D. (2006)

The Ironside Mountain batholith consists of the 170-Ma Ironside Mountain pluton, the quartz diorite of Happy Camp Mountain, the 167-Ma Denny intrusive complex, and the West China Peak intrusive complex. The contact aureole ...
FROM WETLANDS TO WET SPOTS: ENVIRONMENTAL TRACKING AND THE FATE OF CARBONIFEROUS ELEMENTS IN EARLY PERMIAN TROPICAL FL ORAS

DiMichele W.A.; Chaney D.S.; Tabor N.J.; Nelson W.J. (2006)

Diverse wetland vegetation flourished at the margins of the Midland Basin in north-central Texas during the Pennsylvanian Period. Extensive coastal swamps and an ever-wet, tropical climate supported lush growth of pteridosperm, ...
MICROFACIES AND ORIGIN OF SOME ARCHEAN CHERTS (PILBARA, AUSTRALIA)

Orberger B.; Rouchon V.; Hashizume K.; Westall F.; De Vries S.T.; Pinti D.L.; Wagner C.; Wirth R. (2006)

Four cherts sampled in the East Pilbara craton (Western Australia) at Marble Bar (Towers Formation), North Pole Dome (Dresser and Apex Basalt Formation), and Kittys Gap (Panorama Formation) were studied for micro- and ...
PALEOMAGNETISM AND THE TECTONIC EVOLUTION OF THE IONIAN ZONE, NORTHWESTERN GREECE

Broadley L.; Platzman E.; Platt J.; Papanikolaou M.; Matthews S. (2006)

The Ionian zone is a classic thin-skinned linear fold and thrust belt forming a part of the external Hellenides, in westernmost Greece. The region has been a focus of intensive paleomagnetic investigation since the early ...
UNIQUE FEATURES OF THE CENOZOIC IGNEOUS ROCKS OF GREECE

Pe-Piper G.; Piper D.J.W. (2006)

The relationship between Cenozoic igneous rocks and the geodynamic evolution of the Aegean region is synthesized. A simplified palinspastic reconstruction of the region is attempted for the last 50 m.y., on the basis of ...

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