Petrochemistry of Sandstones from the Siberian Hypostratotype of the Riphean in the Uchur–Maya Region |
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| Authors: | L N Kotova V N Podkovyrov |
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| Institution: | (1) Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, nab. Makarova 2, St. Petersburg, 199034, Russia |
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| Abstract: | Based on 148 analyses, we report the petrochemical characteristics of Riphean and Vendian coarse-grained sedimentary rocks of the Uchur–Maya region in eastern Siberia, which is referred to the Proterozoic continental-margin domain. Various methods of petrochemical study applied to Precambrian sandstones are examined. Normative mineral compositions of specific groups of arenites, particularly basal potassic arkoses, are considered. Differences in sandstone compositions at certain stratigraphic levels are shown, and the evolution of chemical composition of rocks is traced through sections of sedimentary cover (Maya Plate) and margin region (Yudoma–Maya Trough). The work presents results of the application of data on mineralogical and chemical compositions of arenites for the restoration of paleodynamic environments in Late Proterozoic sedimentation basins at the southeastern margin of the Siberian Platform. |
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