TERRIGENOUS-CARBONATE CROSS-SECTION IN THE MIDDLE COURSE OF THE VITIM RIVER: CORRELATION, AGE, AND GEODYNAMICS
https://doi.org/10.5800/GT-2022-13-1-0576
Abstract
The descripton has been provided for the cross-section (12 km) of a thick sediment unit on the left bank of the Vitim River, opposite the Nizhny Orlov and Dannaya rivers. This place is related to the Karalon-Mamakan area of the Baikal-Muya belt of the Baikal folded area. The changes have been made to the names formally assigned to the following stratigraphic subdivisions: Sulban series was renamed Chayangra formation, and Kelyan subseries was renamed Karalon formation. Evidence has been found for the complex folded and faulted structure and litological-facial characteristics of the cross-section. Some evidence has been provided to confirm that the Karalon formation is younger than the Chayangra formation. When this result is comapared to the well-studied subdivisions of the northern areas of the region, it is apparent that the Karalon formation may well correlate with the Dalnetaiga horizon of the Lower Vendian, the Chayangra formation – with the Ballaganakh series of the Late Riphean, and its layers at the bottom are similar in composition to the the Medvezhevsk horizon.
Supporting agencies: This work involved equipment from the Shared Research Facilities "Geodynamics and Geochronology" of the Institute of the Earth’s Crust SB RAS (grant 075-15-2021-682).
About the Author
A. M. Stanevich
Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Arkady M. Stanevich
128 Lermontov St, Irkutsk 664033
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Review
For citations:
Stanevich A.M. TERRIGENOUS-CARBONATE CROSS-SECTION IN THE MIDDLE COURSE OF THE VITIM RIVER: CORRELATION, AGE, AND GEODYNAMICS. Geodynamics & Tectonophysics. 2022;13(1):0576. (In Russ.) https://doi.org/10.5800/GT-2022-13-1-0576
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