Geological structure of marine sediments around the Bennett Island according to the very high resolution seismic data

Bennett Island, one of the least explored islands in the Eastern Arctic, is located in the northern part of the Novosibirsk Archipelago between the Laptev and East Siberian Seas and belongs to the Delong Island group. The article presents some of processing and interpretation results of very high-resolution seismic data obtained on the 78th cruise of the R/V Akademik Mstislav Keldysh in 2019. The analysis of seismic sections made it possible to trace the boundary of disconformity between ancient bedrock and young unconsolidated sediments over the entire research area. A relatively deep paleovalley of glacial origin has been discovered, located in the presumed continuation of the valley known in the southern part of the island. Accumulations of shallow gas in sediments were found to the southeast of the island. In the seismic section to the northwest of the island, a tectonically fragmented section of bedrock is observed, which may be associated with the formation of vapor-gas plumes observed on satellite images.

very high resolution seismic profiling, gas plumes, disconformity boundary, bedrock, young deposits, paleovalley, gas accumulations