NEW FINDINGS OF MUD VOLCANISM IN NORTHWEST COAST OF LAKE BAIKAL BASED ON UNDERWATER VIDEO RECORDING

О. V. Lunina; Лунина О. В.; K. M. Kucher; Кучер К. М.; T. V. Naumova; Наумова Т. В.; T. Ya. Sitnikova; Ситникова Т. Я.

doi:10.31857/S2686739723601813

NEW FINDINGS OF MUD VOLCANISM IN NORTHWEST COAST OF LAKE BAIKAL BASED ON UNDERWATER VIDEO RECORDING

Autores: Lunina О.V.¹, Kucher K.M.², Naumova T.V.², Sitnikova T.Y.²
Afiliações:
1. Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences
2. Limnological Institute, Siberian Branch of the Russian Academy of Sciences
Edição: Volume 513, Nº 2 (2023)
Páginas: 218-223
Seção: VOLCANOLOGY
##submission.dateSubmitted##: 30.01.2025
##submission.datePublished##: 01.12.2023
URL: https://vestnik.nvsu.ru/2686-7397/article/view/649766
DOI: https://doi.org/10.31857/S2686739723601813
EDN: https://elibrary.ru/IYIVXA
ID: 649766

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Resumo

We present new data on manifestations of mud volcanism accompanied by gas emissions in Lake Baikal. Brittle deformations of the bottom with traces of erupted liquefied sediments were found in the Malaya Kosa Bay and the Goryachinskaya Bay in the North Baikal depression at depths of 105–163.6 m. The deposits outcropping in the extended scarps and mud craters are mainly represented by highly-porous clays. In places there are ledges of boulder-pebble sediments. The areas of the mud volcanism distribution are confined to the damage North Baikal fault zone, indicating its current activity. Disturbance of the clays and soft sediments covering them indicates the recent eruption of gas-saturated fluid and mud. At depths of 157–162 m in the Goryachinskaya Bay, cone-shaped structures ∼5 × 5 cm in size with a crater in the top part were found in them. Similar griffons were revealed in the Solontsovaya Bay along rectilinear faults opposite the paleoseismic rupture of the same name. It is necessary to continue studying the revealed shallow-water manifestations of mud volcanism and rupture deformations of the bottom by staging complex geological and geophysical studies.

Palavras-chave

mud volcanism, gas, fault, underwater video recording, Lake Baikal

Bibliografia

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