Authigenic carbonates from holocene sediments of Lake Itkul (south of West Siberia) as indicators of climate changes

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Abstract


The results of the study of carbonate-containing bottom sediments from the shallow brackish Lake Itkul (Western Siberia) are presented. The research methods include X-ray diffractometry (XRD), IR spectroscopy, laser granulometry, elemental analysis, etc. By the modeling of XRD carbonate profiles with the Pearson VII function, carbonate phases were identified and their quantitative ratios were determined. By the comparing of carbonate record with lithological, geochemical data in a dated sedimentary section, the evolution of the lake basin in the Holocene caused of climatic changes was reconstructed. Mineralogical signals of the global climatic event known as Bond event 4 in the South of West Siberia have been discovered.


E. P. Solotchina

Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Author for correspondence.
Email: solot@igm.nsc.ru

Russian Federation, 3, Koptyug prospect, Novosibirsk, 630090

M. I. Kuzmin

Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences

Email: solot@igm.nsc.ru

Russian Federation, PBox 9, 1a, Favorsky street, Irkutsk, 664033

Academician of the Russian Academy of Sciences

P. A. Solotchin

Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Email: solot@igm.nsc.ru

Russian Federation, 3, Koptyug prospect, Novosibirsk, 630090

A. E. Maltsev

Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Email: solot@igm.nsc.ru

Russian Federation, 3, Koptyug prospect, Novosibirsk, 630090

G. A. Leonova

Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Email: solot@igm.nsc.ru

Russian Federation, 3, Koptyug prospect, Novosibirsk, 630090

I. V. Danilenko

Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

Email: solot@igm.nsc.ru

Russian Federation, 3, Koptyug prospect, Novosibirsk, 630090

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