Title

L. A. Daragan-Sushchova, O. V. Petrov, Yu. I. Daragan-Sushchov, M. A. Vasilۥ ev

Geological structure peculiarities of the North Kara Shelf according to seismic data

Sedimentary cover partition of North Kara shelf and seismostratigraphy correlation is done on the ground of comprehensive seismic data. The key role of Upper Riphean – Middle Paleozoic series is confirmed. In Upper Riphean – Vendian on the place of shelf were a set of comparatively deep basins. Later they had united in common sedimentary basin with regressive structure. In the North-Kara shelf at the Middle Carboniferous a common block elevation and deep erosion of Ordovician – Cretaceous series had occurred as a result of Hercinian events at the North Taimyr, Severnaya Zemlya and south of Kara Sea. There were no Permian – Triassic rifts at the North Kara shelf. The thickness of upper tectonic unit of Middle Carboniferous – Cretaceous age is of no account and slowly increased in the direction of Barents Sea troughs. A critical view of the terrain conception is given. Individual peculiarities of geological structure of North Kara shelf, divergent from adjacent Barents troughs and South Kara syneclise, are accentuated.
Key words: North-Kara shelf, seismic data, Upper Riphean – Middle Paleozoic.