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Browsing ELibrary by Title
Now showing items 1494-1513 of 21934
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(2003)The marine biota of the Arctic paleobiogeographic realm differed from the biota of the Boreal realm in being taxonomically depauperated rather than in having endemics of a high rank (Superrealm). The biota of the West ...
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(2003)The biotic effects of late Maastrichtian mantle plume volcanism on Ninetyeast Ridge and Deccan volcanism mirror those of the Cretaceous-Tertiary (KT) mass extinction and impact event. Planktonic foraminifera responded to ...
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(1999)A comprehensive analysis of taxonomic composition of pre-Riphean silicified and organic-walled microfossils described in publications is performed and dynamics of stromatolite abundance during the Archean and Paleoproterozoic ...
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(1999)Biotite solid-solutions are a significant H 2 O reservoir in the lithosphere, and the assemblage Bt+Opx+Kfs+Qtz is commonly used to estimate a H2O in high-grade metamorphic and magmatic rocks. Here we report experimental ...
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(2005)The effects of elevated pH, ionic strength, and temperature on sediments in the vadose zone are of primary importance in modeling contaminant transport and understanding the environmental impact of tank leakage at nuclear ...
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(1997)The rate and stoichiometry of biotite dissolution were studied in the pH range 2-10 using thin-film continuous flow reactors. The release of interlayer K is relatively fast and becomes diffusion-controlled within a few ...
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(1999)Ti-biotite megacrysts, glimmerites, and intergrowths of biotite, clinopyroxene, and ilmenite megacrysts were found in Quaternary basanites and Miocene picrobasaltic tuff of the Vitim Plateau. The TiO2 content in the micas ...
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(1994)This paper deals with the chemical composition of biotites from rapakivi granites. For this purpose, 61 chemical analyses of biotites from composite anorthosite-rapakivi plutons in the Fennoscandian and Ukranian shields ...
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(2004)The reductive biotransformation of two Si-ferrihydrite coprecipitates (1 and 5 mole % Si) by Shewanella putrefaciens, strain CN32, was investigated in 1,4-piperazinediethanesulfonic acid-buffered media (pH ∼7) with lactate ...
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(1996)Modern geology now concentrating its attention not at individual sections, but on paleocontinents in gross, and initiated global generalizations, appeals for a unified approach to model zonal scales usable as standards in ...
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(2000)Приведены результаты комплексных биостратигнрафических исследований сюранского и богдановского горизонтов в стратотипической местности. Детально изучена последовательность комплексов аммоноидей, конодонтов, фораминифер, ...
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(1988)The aim of the work reported was to obtain representative data on the concentration and distribution of bismuth in ferromanganese nodules and ore crusts and to establish its relationships to their principal ore-forming ...
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(1989)While studying ore minerals of the Alyaskitovoye ['Alaskite'] tin-tungsten deposit in Yakutia, we found Bi-ramdohrite (≤ 22.5 weight percent bismuth). Among all hitherto known ramdohrites, it is closest in composition (sum ...
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(1988)Teremkovite, Ag2Pb7Sb8S20, usually is regarded as an independent mineral species. However, its crystallographic constants are virtually identical to those of owyheeite. The composition of teremkovite falls within the ...
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(1989)A review of selenides from veins of the brownspar association in the Erzebirge Mountains that have been described in the literature and that occur in association with pitchblende, clauthalite, berzelianite, crookesite, ...
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(2001)Southeastern Russia is characterized by considerable potential coal and brown coal resources. Paleogene to Neogene brown coals and Lower Cretaceous bituminous coals appear to be well developed (Khabarovsk, Bazovsky and ...
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(2000)Detailed stratigraphical and paleontological investigations of many sections in the Kolyma and Omolon river basins and the Okhotsk area resulted in the elaboration of biostratigraphic bivalve zonation of Permian deposits ...
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(2003)Water exchange between the Black Sea and the Mediterranean Sea has been a major focus of the paleohydrography of the eastern Mediterranean. Glacial melt water released from the Black Sea is a potential factor in the formation ...
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(2004)Previous studies concluded that the Bosphorus Strait was formed during the Quaternary by fluvial incision of a valley between the Black Sea, to the north, and the Marmara Sea in the south. Hitherto, however, few details ...
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(1989)The carbonaceous black-shale strata of various ages that exist in different regions of the earth sometimes host large ore bodies, and are the subject of intense scrutiny. The widespread occurrence of black shales in Mongolia ...
Now showing items 1494-1513 of 21934