Influence of Climate Changes in the Late Pleistocene–Holocene on Composition of Bottom Sediments of the Selenga–Buguldeika Saddle, Lake Baikal

The study of bottom sediments of Lake Baikal recovered by submarine drilling at the Selenga–Buguldeika saddle (core VER93-2 st. 24GC) allowed us to reconstruct the climatic events in the Baikal region in the last 20–25 k.y. On the basis of the data on distribution of chemical elements in the core se...

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Bibliographic Details
Published in:Stratigraphy and geological correlation 2018-05, Vol.26 (3), p.344-353
Main Authors: Markova, Yu. N., Oshchepkova, A. V., Kuzmin, M. I., Solotchina, E. P., Solotchin, P. A., Bychinskii, V. A., Chudnenko, K. V.
Format: Article
Language:English
Subjects:
Archaeology
Bottom sediments
Chemical composition
Chemical elements
Clay
Clay minerals
Climate change
Coring
Drilling
Earth and Environmental Science
Earth Sciences
Elements
Geophysics/Geodesy
Historical Geology
Holocene
Lakes
Mineral composition
Minerals
Modelling
Organic chemistry
Pleistocene
Ratios
Sediment
Sedimentology
Sediments
Structural Geology
X-ray diffraction
X-ray diffraction analysis
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Summary:The study of bottom sediments of Lake Baikal recovered by submarine drilling at the Selenga–Buguldeika saddle (core VER93-2 st. 24GC) allowed us to reconstruct the climatic events in the Baikal region in the last 20–25 k.y. On the basis of the data on distribution of chemical elements in the core section, the mineral composition of sediments was calculated by the physicochemical modeling method. A study of how ratios of clay minerals changed in the section allowed us to identify the Pleistocene–Holocene boundary, Bølling–Allerød postglacial warming, and Late Dryas cooling. The calculated data on mineral composition of bottom sediments from the core VER93-2 demonstrate a good fit to the X-ray diffraction analysis results. The proposed approach can be used in calculation of mineral compositions of other sedimentary sequences with known chemical composition.
ISSN:0869-5938
1555-6263
DOI:10.1134/S0869593818030097