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doi: 10.24412/2687-1092-2023-10-78-84
1 Geological Institute of Russian Academy of Sciences, Moscow, Russia 2 Lomonosov Moscow State University, Faculty of Geography, Moscow, Russia 3 Shirshov Institute of Oceanology of Russian Academy of Sciences, Moscow, Russia
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Abstract. Interpretation of the results of multibeam echo sounding and high-frequency seismic profiling, carried out as part of the voyages of the research vessels “Akademik Nikolay Strakhov” in 2018-2019, allowed us to establish that mud volcanic processes play an important role in the formation of pingo-like features on the Pechora Sea shelf. The process of squeezing out plastic-frozen strata to the surface in areas of discontinuous submarine permafrost distribution leads to a violation of its cohesion, the appearance of cracks along which fluid flow moves up the section, involving finely dispersed material in the movement. Pingo-like features mark channels for fluids to reach the surface. The stratigraphy of the sediments composing pingo-like features allows us to conclude that they accumulated sequentially through periodic superposition (similar to mud volcanoes). The freezing of mud volcanic clayey sediments apparently has a syngenetic nature and occurred under conditions of subzero bottom temperatures with the participation of the throttling effect. Keywords: Arctic, degassing, fluidogenic landforms, submarine permafrost, mud volcanism
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Cite this article:
Eremenko E.A., Kokhan A.V., Moroz E.A., Denisova A.P., Mutovkin A.D., Sokolov S.Yu. Mud volcanic processes in the development of pingo-like features in Pechora Sea // Relief and Quaternary deposits of the Arctic, Subarctic and North-West Russia. 2023. Issue 10. P. 78-84. doi: 10.24412/2687-1092-2023-10-78-84
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