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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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咸海演化的关键问题及其对经济、社会和生态价值的重要启示

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地学前缘 2021年第6期28卷 196-204页

作者： s.k.krivonogov T.I.kENsHINBAY R.kh.kURMANBAEV B.s.kARIMOVA Novosibirsk state University Pirogova Str.1630090NovosibirskRussia Institute of geology and mineralogy sB RAs Koptyug Ave.3630090 NovosibirskRussia korkyt-Ata kyzylorda University Aiteke bi29a120000 KyzylordaRepublic of Kazakhstan

本文回顾了Aral sea(咸海)海平面变化的最新认识,以供社会和经济项目决策者使用。我们提出了咸海生态标准的新认识:由于1960年之前当时的人类活动已经引起了湖泊萎缩,咸海在1960年之前是小到中型湖泊,而不是大型湖泊。对咸海认识的改变... 详细信息

本文回顾了Aral sea(咸海)海平面变化的最新认识,以供社会和经济项目决策者使用。我们提出了咸海生态标准的新认识:由于1960年之前当时的人类活动已经引起了湖泊萎缩,咸海在1960年之前是小到中型湖泊,而不是大型湖泊。对咸海认识的改变可能会使许多基于极端情景的昂贵计划变得更加现实。同时,基于地质、考古、历史和水文研究中所获得的多重数据的综合分析,本次结果认为咸海在过去的2万年内经历了多次突然的海侵和海退。然而,除了现代的原因外,引起这些变化的原因的认识仍然不完整,需要进行专门的调查研究。在这篇论文中,我们针对水位变化、气候变化与咸海盆地来自锡尔河和阿姆河供水变化相结合的研究方法进行了讨论。

关键词：咸海湖平面变化气候变化水文变化

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Holocene sedimentary records in Inner Continental Asia:Mongolian Plateau and Tibetan Plateau

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地球环境学报 2011年第1期 320-321页

作者： Orkhonselenge A kashiwaya k krivonogov s Nakamura s Institute of Nature and Environmental Technology Kanazawa University korean Institute of Geology and Mineralogy 3. Center for Chronological Research Nagoya University

This study aims to reveal Holocene environmental changes on the bases of the physical and chemical analyses of the sediment core obtained from Lake kliuvsgul in Mongolian Plateau and Lake siling-co in Tibetan *** results of the Holocene sedimentary sequence in Borsog Bay of Lake khuvsgul shows that certain environmental shifts at about Little Ice Age and 3.5 ka BP;noticeable increases are detected in mineral grain size,whole grain size,mineral content and grain density during the periods when the organic matter content,biogenic silica content and diatom abundance *** sediment in Lake siling-co indicates a comparatively large fluctuations in hydrological conditions at a water inflow for a short period at about 3000;000 a BP;and decreases in the water level at about 4000 a BP and 3500 a BP,when mineral fractions and whole sediments return to coarse grains,mineral content increased,and organic matter and biogenic silica *** results suggest the comparatively large hydrological changes in the inner Asia during the Late Holocene with a similar pattern of the humidity and aridity in the both lakes.

关键词： Asia Holocene sedimentary records in Inner Continental Asia

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Late Pleistocene/Early Holocene climate conditions of North Mongolia based on carbon and oxygen stable isotopes of Dood Lake sediments

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地球环境学报 2011年第1期 318-320页

作者： Narantsetseg Ts Tomurhuu D Oyunchimeg Ts Tuvshingargal B Idermunkh T krivonogov s kuzmin Y Burr G Institute of Geology and mineral resources Mongolian Academy of Sciences korean Institute of Geosciences and Mineral Resources Institute of geology and mineralogy sB RAs Physics Department University of Arizona

Lake Dood is a fresh water lake,remnant of a large glacial lake in the Darkhad *** Mongolia is located at the coordinate of 51°20’ N,99°23’E,in 1538 m a.s.l..The length of the lake is 7.5 km with mean width2.4 km（maximum width is 5.6 km）.Mean depth of the lake Dood is 4.7 m,but deepest point is 17 *** total area is about 41.3 km;.The climate of the Darkhad Basin is extremely continental with a mean annual temperature range of 40 ℃ and a mean annual precipitation of 300;00 ***,the lake Dood occupies a transition zone between mountain and forest steppe ecosystems to the south and the coniferous forests to the *** of its unique geographic location,this region is very sensitive to climate changes and ideal place for paleoclimate *** paper makes an attempt to reconstruct the paleoclimate changes in Early Holocene and Late Pleistocene based on results of isotope geochemistry analysis of the core 1,obtained from the Lake Dood in North Mongolia,during the Mongolian-Russian joint expedition in summer of *** core 1 with length of 645 cm was taken from northern part of the lake,at coordinates of 51°24’26.0 "N;99°19’ 30.7" *** depth is 3.5 *** cores were cut lengthwise and after lithological description,it had been subsampled in 2 cm *** water,organic matter and carbonate contents of sediments were determined by heating the selected 210 samples（approximately 5;0 cm intervals） at 105℃,550℃ and 1000℃,*** isotope ratios of carbon and oxygen on bulk carbonate in 160 sediment samples were determined on Finnigan Mat 252 mass spectrometer at key laboratory of Lanzhou Institute of Geology,Chinese Academy of *** ratios are reported relative to the Pee Dee Belemnite（PDB） standard for carbon and oxygen isotope measurements on bulk CO,.Plant fragments,wood debris and shells from 11 samples from different horizons of core 1 were dated by using Accelerator Mass spectrometry at the University of Arizon

关键词： Lake Late Pleistocene/Early Holocene climate conditions of North Mongolia based on carbon and oxygen stable isotopes of Dood Lake sediments

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从Borsog湾khuvsgul湖的湖泊沉积物推得的蒙古北部全新世水文环境的变化（英文）

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地球环境学报 2011年第3期2卷 457-461页

作者： ORkHONsELENGE A MINO k kAsHIWAYA k krivonogov s YAMAMOTO T sAkAGUCHI A NAkAMURA T Institute of Nature&Environmental Technology Kanazawa University LLRL Institute of Nature&Environmental TechnologyKanazawa University Institute of Geology Geophysics & MineralogySB RAS Department of Earth&Planetary system sciences Hiroshima University Center for Chronological Research Nagoya University

A 13-m long sediment core from Borsog Bay of Lake khuvsgul,northern Mongolia records hydro-environmental changes during the past 10000 years;three rapid environmental changes(ca.2700 a BP,ca.6000 a BP and ca.8000 a BP based on ^(14)C dates of organic carbon materials) are detected in depth profiles of sediment physical *** changes in the physical properties of the core(grain size,grain density and water content) also suggest three periods of large discharge from outside and three periods of stable input(200-500 cm,800-980 cm and 1050-1200 cm).The sedimentation rates in the stable period are 0.102 cm·a^(-1),0.085 cm·a^(-1) and 0.139 cm·a^(-1),*** periods of large discharge likely correspond to the intervals of the three rapid environmental changes,indicating that there were three rapid and high discharge periods related to melt water and/or heavy rainfall during the past 10000 years in this *** analytical results also show that the physical properties are valuable in reconstructing past hydro-geomorphological fluctuations in the lake-catchment system.

关键词： sedimentation rate hydro-geomorphology environmental change Holocene Lake khuvsgul Mongolia

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Late Pleistocene and Holocene environmental changes from sediment records of the Lake Dood(Darhad Basin)in northern Mongolia

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地球环境学报 2011年第1期 321-321页

作者： Oyunchimeg Ts Uugantsetseg B Tomurhuu D Narantsetseg Ts krivonogov s Idermunkh T Institute of Geology and Mineral Resources of the MAs Institute of Geology and Mineralogy of sB of RAs

The paper presents new results in geochemistry and diatoms analyses of the short sediment cores,obtained in 2005 from the Lake Dood(Darhad Basin).The names,length and locations of cores are as following;Core-1,613 cm,51°24’26.0 "N,99°19’30.7" E;Core-2,380 cm,50°23’43.4 "N,99°21’33.7" E;Core-3,150 cm,51°24’03.0 "N,99°21’17.07" *** core samples have been subjected to lithology description,determinations of water contents(WC%),organic matter,total organic carbon(TOC),total nitrogen(TN),C/N and total sulfur(Ts) contents with aims of recording paleo-environmental changes in northern *** and organic matter were determined using drying oven and furnace,while total carbon(TC),total nitrogen(TN) and total sulfur(Ts) contents were analyzed by Elemental Analyzer(Flash EA112 series CHNs-O).The diatom study shows that the sediments of the Dood Lake contain diatoms belonging to the 24 genus and 50 *** the lithology of the cores(from bottom to top) consists of alternations of sand,clayey silt,sandy silt and silty clayey units in accordance with visual lithology *** most full geochemistry analysis have been performed for Core-1 which has several age dating,and in accordance with those data the core covers about14400 a BP and upper 160 cm sediments belong to the Holocene,while lower part of the core sediments had been accumulated during the late *** here mainly concentrate on problems how the organic geochemistry contents and diatom abundances distribute along the cores,what information can be extracted from them,they are consistent or not with information got from other analysis *** TOC and TN contents in the Core-1 are very changeable from 1.32%to 6.59%and from 0.139%to 0.512%,*** wide variation in contents of the TOC and TN revealed for upper 300 cm of sandy silt and silty clayey units in comparison to the lower 300 cm where their contents are relatively uniform and *** this point of view,for core sed

关键词： Lake Darhad Basin)in northern Mongolia Late Pleistocene and Holocene environmental changes from sediment records of the Lake Dood

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