NEOGEAN EVOLUTION OF THE YOUNG URAL-SIBERIAN PLATFORM
V. S. Surkov
Keywords: Neogean, plate, shield, rifting, rift graben, tectonomagmatic cycle
Pages: 754-761
Abstract
The Ural-Siberian young platform is reconsidered in terms of Yanshin's criteria as formed through the early and late Neogean evolution stages.
The early Neogean stage (Riphean-Paleozoic, 1600÷250 Ma) produced the northwestern segment of the Ural-Mongolia fold belt with new continental crust. At the late Neogean stage (Mesozoic-Cenozoic, since 250 Ma), the young platform formed by amalgamation of the West Siberian and South Kara plates, the Urals, the Kazakhstan and Altai-Sayan shields, and the Yenisei Ridge in response to Arctic-Atlantic rifting and orogeny in southern Asia.
Young platforms differ in structural inheritance of their sedimentary cover from the basement and the existence of an intermediate Paleozoic structural stage.
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