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The Holocene environmental changes revealed from the sediments of the Yarkov sub-basin of Lake Chany,south-western Siberia

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Geoscience Frontiers 2023年第2期14卷 133-153页

作者： S.K.Krivonogov A.N.Zhdanova P.A.Solotchin A.Y.Kazansky v.v.Chegis Z.Liu M.Song S.v.Zhilich N.A.Rudaya X.Cao o.v.palagushkina L.B.Nazarova L.S.Syrykh Institute of Geology and Mineralogy Russian Academy of SciencesSiberian BranchNovosibirskRussia Novosibirsk State University NovosibirskRussia Korkyt Ata Kyzylorda University KyzylordaKazakhstan Moscow State University MoscowRussia Geological Institute Russian Academy of SciencesMoscowRussia Pushkov Institute of Terrestrial Magnetism Ionosphere and Radio Wave PropagationRussian Academy of SciencesTroitskRussia Department of Earth Sciences The University of Hong KongHong KongChina State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’anChina Institute of Archaeology and Ethnography Russian Academy of SciencesSiberian BranchNovosibirskRussia Tomsk State University TomskRussia Alpine Paleoecology and Human Adaptation Group(ALPHA) State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina volga Region Federal University KazanRussia Krasnoyarsk Science Center Russian Academy of SciencesSiberian BranchKrasnoyarskRussia Herzen State Pedagogical University St.PetersburgRussia

Lake Chany is the largest endorheic lake in Siberia whose catchment is entirely on the territory of *** geographical location on the climate-sensitive boundary of wet and dry landscapes provides an opportunity to gain more knowledge about environmental changes in the West Siberian interior during the Holocene and about the evolution of the lake *** cores obtained from the Yarkov subbasin of the lake in 2008 have been comprehensively studied by a number of approaches including sedimentology and AMS dating,pollen,diatom and chironomid analyses(with statistical interpretation of the results),mineralogy of authigenic minerals and geochemistry of plant lipids(biomarker analysis.).Synthesis of new results presented here and published data provides a good justification for our hypothesis that Lake Chany is very young,no older than 3.6 ka *** that,between 9 and 3.6 ka BP,the Chany basin was a swampy landscape with a very low sedimentation rate;it could not be identified as a water *** the early lake phase,between 3.6 and 1.5 ka BP,the lake was shallow,1.2–3.5 m in depth,and it rose to its modern size,up to 6.5 m in depth,during the last *** data reveal important changes in the understanding of the history of this large endorheic lake,as before it was envisioned as a large lake with significant changes in water level since ca.14 ka *** addition to hydrology,our proxies provide updates and details of the regional vegetation and climate change since ca.4 ka BP in the WestSiberian forest-steppe and *** evolution of the Chany basin is dependent on hydroclimatic changes in a large region of southern West Siberia,we compare lake-level change and climate-change proxies from the other recently and most comprehensively studied lakes of the region.

关键词： Saline lake Multiproxy study Holocene Climate Environment West Siberia

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