MAJOR STAGES OF THE SIBERIAN PLATFORM EVOLUTION

V. S. Staroseltsev

The paper summarizes data proving that the Siberian Platform cover began to form in the Early Proterozoic time. The geological and geophysical data are given, clarifying structure of the Lower Paleozoic deposits at the Anabar anteclise between the Anabar and Olenyok arches, at the Baikit anteclise and in the adjacent part of the Irkineeva-Chadobets rift, at the Aldan anteclise, and in the conjunction zone of the Tunguska and Anabar anteclises. The mentioned areas of the platform-type Early Proterozoic deposits distribution, including small blocks of the Baikal-Patom framing of the Siberian platform, are situated in zones of the Riphean rift structures, which can denote genetic predeterminacy of these structures. Special focus is on the fact that the Riphean deposits were unfoundedly referred to the intermediate structural stage between the cover and the basement instead of being assigned to the cover structural stage due to its discontinuous extension, presence of terrigenous rocks, and high degree of dislocation as compared with the above deposits. The post-Riphean (Vendian-Silurian, Devonian-Lower Carboniferous, Upper Paleozoic, Triassic, and Jurassic-Cretaceous) structural stages were consistently characterized. They reflect maturity and attenuation of the cover formation. The author justifies stability of the Siberian Platform at the Earth’s surface and proves that paleomagnetic data are untenable in substantiating its movement to the Southern Hemisphere and backwards.

Key words: Lower Proterozoic and Riphean structural stages of the Siberian Platform cover, transregional linear structures, fault zones, deposits of raw mineral resources.

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