AGE OF MUD BRECCIA FROM MUD VOLCANOES IN ACADEMICIAN RIDGE, LAKE BAIKAL

LakeBaikalis the only freshwater reservoir on Earth with gas-hydrate accumulations in its bottom sediments, partly due to the activity of mud volcanoes. This paper describes a group of mud volcanoes recently discovered on the slope of the Academician Ridge between the northern and central LakeBaikal...

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Bibliographic Details
Published in:	Geodinamika i tektonofizika Vol. 8; no. 4; pp. 923 - 932
Main Authors:	Khlystov, O. M., Minami, H., Hachikubo, A., Yamashita, S., De Batist, M., Nauds, L., Khabuev, A. V., Chenskiy, A. G., Gubin, N. A., Vorobyeva, S. S.
Format:	Journal Article
Language:	English
Published:	Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust 01-01-2017
Subjects:	biostratigraphy diatom analysis gas hydrate lake baikal mud volcanic breccia mud volcano seismic stratigraphy
Online Access:	Get full text
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Summary:	LakeBaikalis the only freshwater reservoir on Earth with gas-hydrate accumulations in its bottom sediments, partly due to the activity of mud volcanoes. This paper describes a group of mud volcanoes recently discovered on the slope of the Academician Ridge between the northern and central LakeBaikalbasins. Our analysis of diatom skeletons in the mud breccia sampled from the study area shows a high abundance of Cyclotella iris et var. These extinct species were also discovered in a core sample from BDP-98 borehole. Based on the biostratigraphic and seismostratigraphic correlations, the age of the mud breccia in the studied mud volcanoes ranges from the Late Miocene to the Early Pliocene (4.6 to 5.6 Ma). The correlations suggest that the material originated from a depth of less than310 m below the lake bottom.
ISSN:	2078-502X 2078-502X
DOI:	10.5800/GT-2017-8-4-0324