Sediment Cover Structure in the East Siberian Sea Shelf–Podvodnikov Basin Transition Zone (Arctic Ocean)

Abstract

Summary The new airborne geophysical survey allowed to obtain more detailed data on gravity and magnetic anomalies in the northwestern area of the East Siberian Sea. The basement relief was modelled due to correlation of inversion of magnetic and gravity anomalies with the basement depth according to the seismic data along the seismic profiles. The position of main tectonic boundaries – Vilkitsky Basin in the north, North Chukchi Basin in the east, and Zhokhov Basin in the south – was outlined in accordance with the features of the basement relief. Ten graben-like depressions were detected in the eastern part of De Long Rise. Combine interpretation of the magnetic, gravity, and seismic data allowed to clarify the structure of the studied area and to select the areas prospective for hydrocarbons.