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Geology and paleomagnetism of the Vendian and lower Cambrian deposits from Argun terrane (Eastern Transbaikalia) |
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| Authors: | D V Metelkin I V Gordienko L I Vetluzhskikh N E Mikhaltsov |
| Institution: | 1343. A.A. Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, pr. Akad. Koptyuga, 3, Novosibirsk, 630090, Russia 2343. Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia 3343. Geological Institute of SB RAS, ul. Sakhyanova 6a, Ulan-Ude, 670047, Russia |
| Abstract: | We present new data on the geologic structure and paleomagnetism of the Vendian and Lower Cambrian deposits of the Argun River region in East Transbaikalia. We discuss the issues related to the recognition of the Argun microcontinent within the composite blocks of the south-eastern part of the Central Asian belt, which are traditionally combined in the Amuria superterrane. Our paleomagnetic determinations help us justify the equatorial position of the sedimentary basin, in which the deposits of the Argun terrane Beletuy and Bystrin formations formed 560 and 525 Ma, close to or directly on the margin of the Siberian paleocontinent. This data is essential for the reconstruction of the geodynamic evolution of Siberia and Central Asia at the Precambrian-Paleozoic boundary. |
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