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Tectonic Model of the Formation of the Chukchi Borderland

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Geotectonics Aims and scope

Abstract

The Chukchi Borderland is a tectonic unit of the eastern part of the Arctic continental margin of Eurasia that is part of the complex of the Central Arctic rises, along with the Lomonosov Ridge, the Alpha‒Mendeleev Rise, the Podvodnikov, Chukchi and Mendeleev basins. The study provides data on the structure of the Chukchi Borderland and the surrounding geological structures, morphology and geology, uses bathymetric materials, seismic materials from CDP and deep seismic survey, sampling and drilling data. A review of materials on the study region was carried out. The latest results of geomorphological analysis of bathymetric data and 3D modeling of the Earth’s crust of the study region using geophysical data are presented. To explain the identified features of the morphology and deep structure of the Chukchi Borderland, a tectonic model is proposed that explains the deep mechanisms of its formation and adjacent structures, as well as a structural-tectonic scheme of the Arctic Alaska–Chukotka microplate, which presents the morphological and geological connection of the Chukchi Borderland with the continental shelf.

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ACKNOWLEDGMENTS

The authors are grateful to L.I. Lobkovsky (Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia) and S.D. Sokolov (Geological Institute, Russian Academy of Sciences, Moscow, Russia) for discussion and consultations in preparing the materials of the article. The authors are grateful to the reviewer K.E. Degtyarev (Geological Institute, Russian Academy of Sciences, Moscow, Russia) and an anonymous reviewer for useful comments and gratitude to the editor M.N. Shoupletsova (Geological Institute, Russian Academy of Sciences, Moscow, Russia) for careful editing.

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This work was supported by ongoing institutional funding. No additional grants to carry out or direct thisparticular research were obtained.

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Poselov, V.A., Zholondz, A.S., Smirnov, O.E. et al. Tectonic Model of the Formation of the Chukchi Borderland. Geotecton. 57 (Suppl 1), S53–S68 (2023). https://doi.org/10.1134/S0016852123070117

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