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Abstract <p>Bennett Island, one of the least explored 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 processing and interpretation results of very-high-resolution seismic data obtained on cruise 78 of the R/V <i>Akademik Mstislav Keldysh</i> in 2019. 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.</p>

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Geological Structure of Marine Sediments around Bennett Island Based on Very-High-Resolution Seismic Data

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • V. G. Gainanov,
  • A. S. Zverev,
  • Li Guogui

摘要

Abstract

Bennett Island, one of the least explored 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 processing and interpretation results of very-high-resolution seismic data obtained on cruise 78 of the R/V Akademik Mstislav Keldysh in 2019. 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.