Deep Structure and Geodynamics of the Pre-Mesozoic Sedimentary Successions within the Northern West Siberia

The data derived from deep CDP, DSS and conventional seismic study of the territory of Northern West Siberia give evidences to suggest different stages of evolution of the region. The plate tectonics took place up to the Middle Palaeozoic. The interaction of a mantle plume and earth crust causes the large-scale sedimentary basin formation during the Middle-Upper Palaeozoic. The rift occurred in the end of the Palaeozoic up to Early Triassic time, and after these, general subsidence of the lithosphere was resulted by formation of the West-Siberian sedimentary province. We conclude that, in the area of study, 4-6 km thick carbonate-terrigenous sedimentary complex exists beneath the Mesozoic to Cenozoic oil and gas bearing cover.