All-Russia Scientific Research Institute for Geology and Mineral Resources of the Ocean,Saint-Petersburg, Russia

G. A. Zavarzina, Leading Researcher, Candidate of Geological and Mineralogical Sciences

Sergo Ordzhonikidze Russian State University for Geological Prospecting, Moscow, Russia1 ; Oil and Gas Institute of the Ministry of Science and Education of the Republic of Azerbaijan, Baku, Azerbaijan2
V. Yu. Kerimov, Head of Department¹, Chief Researcher², Doctor of Geological and Mineralogical Sciences, Professor, vagif.kerimov@mail.ru

Sergo Ordzhonikidze Russian State University for Geological Prospecting, Moscow, Russia
U. S. Serikova, Associate Professor, Doctor of Engineering Sciences
S. A. Guryanov, Senior Lecturer, Candidate of Geological and Mineralogical Sciences

The sedimentary basins of the East Siberian continental margin, which are composed of the Cretaceous–Cenozoic clinoform deposits, have a complex geological structure. These basins are of significant interest in terms of hydrocarbon exploration. The presence of conflicting models regarding the geological structure of the sedimentary cover in the East Siberian and Chukchi Seas results in significant variations in the assessment of their hydrocarbon potential. Through an integrated interpretation of geological and geophysical data, a tectonic zoning of the East Siberian continental margin has been conducted, and a geological model has been proposed. This model suggests a strike-slip nature for the sedimentary basins, whose evolution is closely tied to the development of the Arctic Ocean. It is influenced by major tectonic events, such as the successive opening of the Canadian Basin, the Makarov–Podvodnikov Trough and the Eurasian Basin. Tectonic zoning used the structural map of the bottom surface of sedimentary cover, integrated structural and seismo-geological criteria, results of gravimetric and magnetic measurements, and the analysis of thickness maps of basic structural-formation zones. When making charts of tectonic zoning, within the test area, certain zones with similar structure of folded bottom surface, reflected in conservative fields, were identified. All identified tectonic elements feature individual development against the background of general large tectonic events in the region. There is a stable correlation between disjunctive dislocations on folded bottom surface and the interfaces of the main structural elements. Tectonic deformations in the sedimentary cover of the East Siberian continental margin are correlated with the zones of strike-slip processes which contributed to the development of basic structures.

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