Depositional Environments and Paleogeographic Evolution during the Formation of Upper Paleozoic Terrigenous Rocks in Taimyr

Upper Paleozoic sections in Taimyr comprise genetic rock complexes of different zones: deep-water shelf; offshore transition zone; shoals, deltas, and beaches of open coasts; bars; shallow lagoons; coastal lagoons; swampy coastal alluvial plain; and drained (distal) alluvial plain. Peculiarities of their spatiotemporal relationships became the basis for compiling paleogeographic schemes of short geological time intervals corresponding to the regional transgressive and regressive maximums. Before the Artinskian (Early Permian), the "Yenisei Land" existed in the southwest, with river systems transporting the terrigenous material to a marine basin opening to the northeast. First signs of the "Kara Land" existence in the north are recorded in the Kungurian sections. In the Middle-Late Permian, a single "Yenisei-Kara Land" was formed, and the eastern part of Taimyr became a giant lagoon of the "Verkhoyansk Sea."