POSITION OF THE SIBERIAN PLATFORM AND ADJACENT CRATONIC TERRANES IN THE PALEOZOIC (from paleontological and geological evidence)
A.V. Kanygin1, T.V. Gonta1,2, A.V. Timokhin1
1Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
2Novosibirsk State University, ul. Pirogova 1, Novosibirsk, 630090, Russia
Keywords: Foldbelt, terranes, Paleozoic, tectonics, sedimentology, paleogeography, stratigraphy, chorology, Northeastern Asia, Siberian paleocontinent
Abstract
The comprehensive chorological analyses of benthic and planktonic faunal groups, the reconstruction of paleogeography, and the delineation and correlation of the same-type biofacies and geographic ranges of the fauna suggest that the Paleozoic tectonic blocks of the Verkhoyansk-Chukotka foldbelt (Tas-Khayakhtakh, Selennyakh, Omulevka, Omolon, Okhotsk, and Chukchi inliers) and Kotel’nyi Island originated in the same epicontinental sea basin of the Siberian paleocontinent, being parts of its passive margin located at the place of the recent foldbelt. We provide a rationale for paleontological, sedimentary, and morphometric diagnostic characteristics of rift zones in complex thrust-folded structures. A rift development, with activation phases in the Ordovician and Devonian, is found to have preceded the breakup of the passive margin in the late Paleozoic.
DOI: 10.15372/RGG2019139
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