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Now showing items 1-20 of 231
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(1997)Five of six samples representing the entire stratigraphic sequence (∼3700 m thick) of basaltic flows in the Noril'sk section in the northwestern part of Siberian flood basalt province, Russia yield 40Ar–39Ar plateau ages ...
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(1996)Establishing an accurate and precise age for Siberian flood-basalt volcanism is of great importance in evaluating causes for the unequaled mass extinction of flora and fauna at the Permian-Triassic boundary. We report a ...
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(2003)A new Sinokannemeyeriine species, Rhadiodromus mariae, is described. This species occurs only in the upper horizon of the Donguz Formation, while R. klimovi is confined to beds with sandy lenses at the bottom of the upper ...
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(1995)age spectra of biotite from a mineralized vein in the ore-bearing, Noril'sk I intrusion and from picritic-like gabbrodolerite from the weakly mineralized, Lower Talnakh intrusion show that these bodies were emplaced at 249 ...
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(1996)A stable isotope study of 168 plutonic igneous rock and five water samples from Transbaikalia, East Asia, has been made, including 318 whole-rock and mineral 18O/16O analyses and 14 D/H analyses. This represents the first ...
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(2006)The Jianfengling composite batholith is chiefly composed of the Jianfengling superunit with medium-coarse grained porphyritic, fine-grained porphyritic, coarse-medium grained and fine-grained biotite syenogranites. These ...
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(2002)The Permian–Triassic (P–T) mass extinction, the greatest biological mortality event in the Earth’s history, was probably caused by dramatic and global forcing mechanisms such as the Siberian flood volcanism. Here we present ...
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(1989)In one area of Yakutia there is a kimberlite pipe that is truncated by a thick (about 100 m) Permo-Triassic dolerite sill and other, smaller bodies of the traprock association. At the contact with the dolerite sill, the ...
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(2001)The central Himalayas and the Salt Range are type areas of the lower and upper Induan substages, respectively. The lower Induan Substage spans the interval of Otoceras and Ophiceras beds. The Otoceras Beds in the range of ...
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(2004)Taxonomic diversity is only one possible biodiversity metric. Studies of taxonomic and morphologic diversity indicate that the two need not be closely linked. Mass extinctions, and their associated recovery periods, can ...
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(1987)The meteorite crater is isometric, with some angularity. The highest evaluation of its rim is 755 m in the south and 712 m in the north. The maximum evaluation of the rim above the crater floor is 305 m. The width of the ...
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(2006)Twenty-six groundwater samples were collected from the Eastern Thessaly region and analysed by ICP-ES for these elements: Al, As, P, Pb, Zn, Mn, Fe, Cr, Sb, Cu, Na, Br, Cl, Si, Mg, Ag, Be, Bi, Dy, Er, Eu, Au, Ge, Ho, In, ...
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(2004)Accelerated biotic turnover during the Late Triassic has led to the perception of an end-Triassic mass extinction event, now regarded as one of the ‘‘big five’’ extinctions. Close examination of the fossil record reveals ...
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(1988)The Siberian craton abounds with traps of different facies, and may be regarded in this respect as a standard. Permian-Triassic traps are most common here, so we primarily use them to characterize the volcanisms of the ...
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(2003)Mesozoic intraplate continental basaltic volcanism at the Franz Josef Land (FJL) archipelago is related to the activity of the Iceland plume [1, 2]. The volcanic activity was less significant but genetically close to the ...
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(2005)This paper presents the results of the paleomagnetic and magnetic mineralogical studies carried out along the sequence of the recently discovered oldest Nedubrovo (Early Triassic) rocks of the Moscow Syneclise, exposed in ...
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(2002)The Lower Triassic section in the Abrek Bay region, southern Primor'e, is described in detail along with its lithologic, paleontological, and magnetostratigraphic characteristics. This and another section in the Tri Kamnya ...
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(1996)Abundance and carbon isotope data from an Fe(CO3)OH component in apparent solid solution in oolitic goethites have been used to infer ancient atmospheric CO2 pressures. A test of the validity of these estimates might be ...
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(2004)Permian waning of the low-latitude Alleghenian/Variscan/Hercynian orogenesis led to a long collisional orogeny gap that cut down the availability of chemically weatherable fresh silicate rock resulting in a high-CO2 ...
Now showing items 1-20 of 231