Correlation and Microfossils of Vend-Cambrian Sediments from Chaika Parametrical Borehole 279
Complex (paleontologic and isotope methods) gorizons correlation between sediments of the Baikal-Patom region (BPR) and south of the Siberian platform (SSP) is made. The published data on microfossils, small-shell fossils, relations of 87Sr/86Sr in carbonates, U-PB datings of clastic zircons have been used. Levels Nemakit-Daldyn and Tommot inter-regional stages are correlated most precisely. Sedimentation and geodynamic evolution of territory in Neoproterozoic is shown for sections of the BPR. Three stages of development are underlined: passive margin (rifting), back-ark basin and foreland basin. Two top stages of BPR are correlated with sections of boreholes of the SSP and correspond with Vend in an interval 600–540 million years. Microfossils from Chaika parametrical borehole 279 are received and described for the first time.