Facies characteristics and terrigenous sedimentation features of the lower Riphean Mukun Group (Anabar Uplift,Siberia) |
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| Authors: | P Yu Petrov |
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| Institution: | 1.Geological Institute,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | The Mukun Group represents a thick (>750 m) complex of terrigenous features sediments in the lower part of the Riphean sedimentary
cover of the Anabar region was formed on the spacious cratonic block. The complex is remarkable for its pure quartzarenitic
composition. The facies analysis with emphasis on the genetic interpretation of various sedimentary structures revealed three
facies associations in its sedimentary succession: alluvial, eolian-fluvial, and fluvial-sabkha. It is shown that sedimentary
material was transported into the terminal basin by a braided system of permanent rivers. Relationships between the eolian
and fluvial components in the single sedimentation system of the Mukun paleobasin is considered in line with the proposed
model, according to which alternation of long periods with the eolian and fluvial sedimentation was controlled by tectonics. |
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