Integrated Interpretation of the Data of Regional Geophysical Studies in the Northern Laptev Sea

In the summer of 2018 on the boundary of the Laptev Sea and Arctic Ocean, JSC SMNG and OP SPbMP JSC Rosgeologia performed integrated regional geophysical investigations including 6000 line km of 2D CDP seismic reflection data, above-water gravimetric and hydromagnetic data. From the seismic data, a tectonic map for the base of the sedimentary cover was constructed. On this map, boundaries of Priseverozemelsko-Pritaymyrskaya continental margin and Eurasian oceanic basin were refined, West Laptev continental slope and Progradational Area of the Gakkel Ridge studied for the first time. From data of gravimetric and magnitometric surveys, a map of classes of magnetic and gravity fields anomalies corresponding to the blocks of rocks with different physical properties was calculated. Integrated analysis of geophysical data enabled to compare the positions of the boundaries of the Pritaymyrsko-Prinovozemelskaya contintntal margin and the Eurasian oceanic basin and reveal basement blocks with different physical properties.