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M. A. Levitan A. S. Alekseev N. V. Badulina Yu. P. Girin L. F. Kopaevich I. V. Kubrakova O. A. Tyutyunnik M. Yu. Chudetsky 《Geochemistry International》2010,48(6):534-554
Detailed data obtained on the chemistry of sedimentary rocks from the mountainous part of Crimea and the northwestern Caucasus
that were dated at the Cenomanian/Turonian boundary and were formed during Oceanic Anoxic Event 2 (OAE 2) make it possible
to calculate the dissolved oxygen concentration in the bottom waters of the sedimentation basin. The enrichment coefficients
of trace elements in the black shales are revised and an explanation is suggested for the genesis of the rocks with regard
for unusual climatic changes. 相似文献
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M. A. Levitan M. V. Bourtman L. L. Demina M. Yu. Chudetsky F. Schoster 《Lithology and Mineral Resources》2005,40(5):408-419
Recent sedimentary environments and facies of the southern Kara Sea are described. Lithological, mineralogical, geochemical, and micropaleontological indicators are used to characterize the facies variability. Some mechanisms of mineralogical and geochemical differentiation, which contribute to the facies zonation, are revealed. 相似文献
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Levitan M. A. Bourtman M. V. Demina L. L. Krupskaya V. V. Sedykh E. M. Chudetsky M. Yu. 《Lithology and Mineral Resources》2004,39(6):566-579
Two bottom sediment cores (BP00-23/7 and BP00-7/6) recovered from the Yenisei transect in the southern Kara Sea are described. Data on their grain size composition, clay and heavy mineral assemblages, and distribution of a large group of chemical elements are presented. Radiocarbon dates based on AMS C-14 method suggest the Holocene age of sediments in the cores. Literature data on physical properties and foraminifers have also been analyzed. The facies affiliation of the lithostratigraphic subdivisions has been unraveled. History of the Yenisei River runoff in the Holocene has been reconstructed on the basis of different indicators. 相似文献
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