A New Model of the Geological Structure and Evolution of the North Kara Sedimentary Basin

摘要

Based on the new seismic data, the geological structure and evolution of the North Kara Basin are presented. The North Kara Basin formed as an Early Ordovician rift system. Approximately at the Devonian-Carboniferous boundary, the North Kara Basin suffered intraplate compressional deformations, which caused formation of inversion swells, and then it was covered by a thin Carboniferous-Permian or Permian cover. The Urvantsev Trough probably comprising Late Ordovician evaporites was distinguished in the northeastern part of the basin. Paleozoic folded deformations took place within the limits of the Vize-Ushakov and Central Kara rises.