CHARACTER OF SEDIMENTATION IN LAKE BAIKAL IN THE HOLOCENE
E.G. Vologina, M. Sturm*, S.S. Vorob'eva**, L.Z. Granina**, and S.Yu. Toshchakov***
Limnological Institute, Siberian Branch of the RAS,
3 ul. Ulan-Batorskaya, Irkutsk, 664033, Russia
* Suisse Federal Institute of Science and Technology of Environment,
Duebendorff, POB 611, CH-8600, Suisse
** Institute of Limnology, Siberian Branch of the RAS,
3 ul. Ulan-Batorskaya, Irkutsk, 664033, Russia
*** Siberian Institute of Physiology and Biochemistry of Plants, Siberian Branch of the RAS,
132 ul. Lermontova, Irkutsk, 664033, Russia
Keywords: Bottom sediments, sedimentation conditions, turbidites, frustules, oxidized layers, Baikal
Pages: 388-402
Abstract
The bottom sediments of Lake Baikal were studied, with the emphasis placed upon the conditions of sedimentation in the Holocene and material composition of the sediments. On the basis of study of spatial distribution of sediments in all parts of the lake, six characteristic zones of sedimentation have been recognized. Lithological types of sections of the modern bottom deposits of Baikal are described in detail. Much attention is given to the description of turbidite sedimentation as one of the main mechanisms of formation of bottom sediments in the Holocene. Some features distinguish turbidites from sediments accumulated under calm conditions. It has been established that buried relics of oxidized Fe-Mn formations occur not only in the northern basin of the lake but also in the southern basin.
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