Zinchenko A.G.1, Egorov S.V.2, Firsov Yu.G.1, Ivanov M.V.1, Koloskov E.N.1 

NEW DATA ON THE RELIEF OF THE LAPTEV SEA SECTOR OF THE EURASIAN BASIN CONTINENTAL SLOPE (BASED ON THE RESULTS OF BATHYMETRIC SURVEYS IN 2022 AND 2024) 

Relief and Quaternary deposits of the Arctic, Subarctic and North-West Russia. Issue 11.

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doi: 10.24412/2687-1092-2024-11-146-157

Лицензия Creative Commons

1 VNIIOkeangeologiya, St. Petersburg, Russia

2 280 "Central Cartographic Production of the Navy", St. Petersburg, Russia 

 

     

 

Abstract. New detailed current bathymetric data on the subsurface sector of the continental slope of the Eurasian basin were considered and their preliminary geomorphological analysis was given. The area is of exceptional importance for the study of geological structure and a wide range of natural processes. The first models of geological structure of this area were based on interpretation of scattered bathymetric and gravimagnetic data, information about modern seismicity and seismic materials on the inner part of the Laptev Sea shelf, obtained in the late 20th century, early 21st century. The present state of bathymetric study of the Arctic Ocean based on international models IBCAO version 5 and GEBCO 2024 is presented. It is noted that the international bathymetric models are uneven and do not include the results of Russian bathymetric surveys carried out between 2010 and 2023. To support the Russian partial revised submission for the extended continental shelf in the Arctic. The information is provided on the results of a modern bathymetric survey carried out in 2022 and 2024 on an oceanographic research vessel «Amber» in the subseaboard sector of the continental slope of the Eurasian basin. Detailed bathymetric model of the entire survey area, as well as a detailed model of the bottom section with development of muddy-gully forms. The preliminary geomorphological analysis of MRC, based on new bathymetric data, has significantly improved and refined previously available information. Differences in the structure of the surface of the bottom of the zone of the Gakkel ridge and the continental slope to the west of it have been recorded. Several generations of landslide bodies, active and dead valley forms were identified. In the Sadko valley, a complex combination of neotectonic and gravitational processes takes place. Recommendations on technological equipment for conducting modern marine geological surveys.

Keywords: Arctic Ocean, Arctic Basin,  Laptev sector, continental slope, Eurasian Basin, Sadko Valley, bathymetric survey, multibeam echosounder, digital models, bottom relief, geomorphological analysis, landslide flows, marine toponymic

 


 

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Cite this article:

Zinchenko A.G., Egorov S.V., Firsov Yu.G., Ivanov M.V., Koloskov E.N. New data on the relief of the Laptev sea sector of the Eurasian basin continental slope (based on the results of bathymetric surveys in 2022 and 2024) // Relief and Quaternary deposits of the Arctic, Subarctic and North-West Russia. 2024. Issue 11. P. 146-157. doi: 10.24412/2687-1092-2024-11-146-157

 



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