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

Yu. N. Markova  A. V. Oshchepkova  M. I. Kuzmin  E. P. Solotchina  P. A. Solotchin  V. A. Bychinskii  K. V. Chudnenko 《Stratigraphy and Geological Correlation》2018,26(3):344-353

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.  相似文献   

Carbonates in the sedimentary record of saline Tsagan-Tyrm Lake,west Baikal region: New type of high-resolution paleoclimatic signals     

E. P. Solotchina  E. V. Sklyarov  E. G. Vologina  L. A. Orlova  O. A. Sklyarova  P. A. Solotchin  V. N. Stolpovskaya  V. S. Fedorovskii  O. M. Khlystov 《Doklady Earth Sciences》2008,421(2):926-933

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Carbonate sedimentation in shallow saline lakes of Western Transbaikalia: The response to Holocene climate changes     

P. A. Solotchin  E. V. Sklyarov  E. P. Solotchina  Y. N. Markova 《Doklady Earth Sciences》2017,473(2):461-466

New research results are presented on the processes of carbonate sedimentation in shallow saline lakes of Western Transbaikalia by the example of the Holocene bottom sediments of Sul’fatnoe Lake (the Selenga Dauria). The techniques of X-ray diffractometry (XRD), IR spectroscopy, laser granulometry, and isotope and elemental analyses were used. By means of decomposition the XRD profiles using the Pearson VII function, the carbonate phases were identified and their quantitative ratios were determined. The evolution of the lake basin caused by climate changes in the Holocene was reconstructed by comparing the carbonate record to the concentrations determined for the ¹⁸O and ¹³C stable isotopes and to lithological, geochemical, and palynological data in the dated sedimentary section.  相似文献