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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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蒙古Khuvsgul湖HDP09湖芯中地下玄武岩的K-Ar年龄:对贝加尔裂谷起始时间的估计（英文）

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地球环境学报 2011年第3期2卷 462-466页

作者： HASEBE Noriko ITO Kazumi HASEBE Akihiro narantsetseg ts OYUNCHIMEG ts IVANOV Egor V KASHIWAYA Kenji Institute of Nature and Environmental Technology Kanazawa University Frontier Science Organization Kanazawa University Institute of Geology and Mineral Resources MAS Institute of Geochemistry Siberia Branch of RAS

HDP09 core drilled in Lake Khuvsgul,Mongoria,at 50°52'48 'N,100°26'30' E where the water depth is 222.25 m reached to the depth of ~60 m below lake floor in *** bottom part of the core consists of alkali *** basalt consists of the basement of the lake Khuvsgul based on its bulk chemistry and core position plotted on the seismic profile.K-Ar age of the basalt is(8.5±0.2) Ma,which is concordant with the on-land basalt distributed in the eastern part of the lake,and implies the maximum age of the Lake Khuvsgul formation.

关键词： Lake Khuvsgul Baikal rift zone alkali basalt K-Ar dating

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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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未来气候条件下蒙古草原植被的预测分布

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Journal of Plant Ecology 2024年第3期17卷 16-27页

作者： Kohei Suzuki Ikutaro tsuyama Radnaakhand Tungalag Amartuvshin narantsetseg tsagaanbandi tsendeekhuu Masato Shinoda Norikazu Yamanaka Takashi Kamijo Department of Regional Regeneration Science Faculty of Regional Environment ScienceTokyo University of AgricultureTokyo 156-8502Japan Hokkaido Research Center Forestry and Forest Products Research InstituteHokkaido 062-8516Japan Department ofBiology School of Arts and SciencesNational University of MongoliaUlaanbaatar 210646Mongolia Botanic Garden and ResearchInstitute Mongolian Academy of ScienceUlaanbaatar 51Mongolia Department of Earth and Environmental Sciences GraduateSchool of Environmental StudiesNagoya UniversityNagoya 464-8601Japan Arid Land Research Center Tottori UniversityTottori680-0001Japan Faculty of Life and Environmental Sciences University of TsukubaIbaraki 305-8572Japan

蒙古牧民家庭通过适应当地植被分布的特点来维持牲畜的健康状况。因此,预测未来植被变化对于稳定的牲畜放牧和可持续的草原利用至关重要。本研究基于前期研究获得的植被数据预测了2081年至2100年间草原植被,尤其是沙漠草原、草原和草甸... 详细信息

蒙古牧民家庭通过适应当地植被分布的特点来维持牲畜的健康状况。因此,预测未来植被变化对于稳定的牲畜放牧和可持续的草原利用至关重要。本研究基于前期研究获得的植被数据预测了2081年至2100年间草原植被,尤其是沙漠草原、草原和草甸草原的分布范围。我们首先基于在蒙古(43–50°N,87–119°E)收集的草原植被数据(2012至2016年,278个样地)划分了不同的群落类型。其次,采用最大熵(MaxEnt)模型进行物种分布建模,其中以荒漠草原、草原和草甸草原的分布数据作为目标变量,使用WorldClim的生物气候数据作为解释变量。最后,采用WorldClim提供的CMIP6下缩放的未来气候预测数据进行未来预测。结果发现,荒漠草原、草原和草甸草原模型的曲线下面积值分别为0.850、0.847和0.873。根据所有情景和所有群落的气候变化,适宜栖息地预计将缩小。潜在适宜区域减少的程度在草甸草原群落中最为显著。上述结果表明,未来气候变化情景下草甸草原群落将转变为草原群落。

关键词：气候变化群落最大熵物种分布建模草原 WorldClim

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中亚造山带南蒙古地区石炭纪--二叠纪岩浆活动及其构造意义

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西北地质 2024年第3期57卷 11-28页

作者：吴妍蓉周海赵国春韩以贵张东海王盟赵少伟裴先治赵千 narantsetseg tserendash 耿红燕 Enkh-Orshikh Orsoo 长安大学地球科学与资源学院陕西西安710054 西北大学地质学系国家大陆动力学重点实验室陕西西安710069 香港大学地球科学系中国香港999077 三明学院国家公园研究中心福建三明365004 蒙古国国家科学院古生物与地质研究所乌兰巴托999097-15141 岭南大学科学教研组中国香港999077 马可波罗矿业有限公司乌兰巴托999097-15141

中亚造山带作为显生宙以来全球最大的增生型造山带,记录了古亚洲洋俯冲、增生、闭合的全过程。南蒙古地区位于中亚造山带南缘中段,其晚古生代先后发育弧岩浆活动以及与伸展活动相关的岩石组合,是研究陆壳增生和改造的热点区域。笔者结... 详细信息

中亚造山带作为显生宙以来全球最大的增生型造山带,记录了古亚洲洋俯冲、增生、闭合的全过程。南蒙古地区位于中亚造山带南缘中段,其晚古生代先后发育弧岩浆活动以及与伸展活动相关的岩石组合,是研究陆壳增生和改造的热点区域。笔者结合区域地质特征及前人研究对南蒙古地区石炭纪--二叠纪这一关键时期的岩石组合做出系统梳理和总结,研究区石炭纪--二叠纪岩浆活动大致可以分为早石炭世(350~325 Ma),晚石炭世(320~305 Ma)和早二叠世(300~280Ma)3个阶段。早石炭世(350~325Ma)发育典型的弧岩浆岩且具有向南变年轻的趋势。此外,全岩Nd和锆石Hf同位素显示其主体具有显著的地幔贡献。综合前人认识,笔者认为这是古亚洲洋主洋盆以北多个次生的弧后洋盆俯冲后撤的结果。晚石炭世(320~305Ma)以高硅花岗岩为主,尤其315~310Ma的碱长花岗岩、碱长正长岩等是年轻弧地体重熔的产物,是俯冲大洋板片显著消耗的结束。早二叠世(300~280Ma)发育伸展相关的岩石组合(如A型花岗岩、双峰式火山岩和基性岩墙),这些岩浆活动显示高温特征,且具有显著的地幔物质贡献。结合前人工作,特别是笔者的前期工作,上述岩浆活动是由石炭纪板片后撤之后高角度俯冲诱发的俯冲板片断离所造成,且前人研究成果表明南蒙古东西两侧均有类似的岩石、构造和沉积记录。因此,笔者提出,古亚洲洋主洋盆泥盆纪--二叠纪多期次的俯冲后撤导致了其北侧一系列次生的弧后洋盆的开启、俯冲至闭合,上述过程伴随了中亚造山带南缘最后一次大规模侧向增生及其结束后板片断离诱发的垂向地壳增生。

关键词：中亚造山带石炭纪—二叠纪岩浆活动构造演化南蒙古地区

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Petrogenesis and Tectonic Significance of Carboniferous Granites on the North Side of the Solonker Suture,Central South Mongolia

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Acta Geologica Sinica(English Edition) 2021年第2期95卷 481-499页

作者： ZHANG Xiaowei TONG Ying WANG Tao ZHAO Hui GUO Lei narantsetseg tsERENDASH Delgerzaya UNtsAG Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources Beijing 100037China Chifeng University ChifengInner Mongolia 024000China Institute of Paleontology and Geology Mongolian Academy of SciencesUlaanbaatar 15160Mongolia

The central part of South Mongolia,located to the north of the Solonker Suture,is a key region for studying the late Paleozoic tectonic evolution of the Central Asian Orogenic Belt(CAOB).Voluminous late Paleozoic granitic rocks,especially of Carboniferous age,were intruded in this ***,these granitoids have not been well studied and there is a lack of precise ages and isotopic *** has hampered our understanding of the tectonic evolution of southeastern Mongolia,and even the entire *** this paper,we provide new U-Pb isotopic ages and geochemical analyses for these Carboniferous *** granite from the Ulaanbadrakh pluton yielded a zircon U-Pb age of 326 Ma,which indicates emplacement in the Early Carboniferous,and three other granites from the Khatanbulag region gave zircon U-Pb ages of 316 Ma,315 Ma,and 311 Ma,which indicate emplacement in the Late *** Early Carboniferous granite has SiO2 contents of 70.04–70.39 wt%and K_(2)O+Na_(2)O contents of 6.48–6.63 wt%,whereas the Late Carboniferous granites have more variable compositions(SiO2=65.29–77.91 wt%and K2O+Na2O=5.30–7.27 wt%).All the granites are weakly-peraluminous I-types that are relatively enriched in U,Th,K,Zr,Hf,and *** whole rock Sr-Nd and zircon in situ Lu-Hf isotope analyses for the Early Carboniferous granite gave positive values ofεNd(t)(2.87)andεHf(t)(4.31–12.37)with young Nd(TDM=860 Ma)and Hf(TDMc=1367–637 Ma)two-stage model ages,indicating derivation from juvenile crustal *** contrast,the Late Carboniferous granites had more diverse values ofεNd(t)(–4.03 to 2.18)andεHf(t)(–12.69 to 5.04)with old Nd(TDM=1358–1225 Ma)and Hf(TDMc=2881–1294 Ma)depleted mantle two-stage model ages,suggesting derivation from remelting of Precambrian *** on the existing results,the tectonic setting of the Late Carboniferous granites in the central part of South Mongolia is known for its diversity,and this paper believes that the tectonic background of the carboni

关键词： Carboniferous granites continental margin arc post-collisional central South Mongolia Central Asian Orogenic Belt

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Rollback,scissor-like closure of the Mongol-Okhotsk Ocean and formation of an orocline:magmatic migration based on a large archive of age data

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National Science Review 2022年第5期9卷 167-178页

作者： Tao Wang Ying Tong Wenjiao Xiao Lei Guo Brian F.Windley Tatiana Donskaya Shan Li narantsetseg tserendash Jianjun Zhang Beijing SHRIMP Center Institute of Geology Chinese Academy of Geological Sciences Key Laboratory of Earth Probe and Geodynamics Chinese Academy of Geological Sciences Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences School of Geography Geology and the EnvironmentUniversity of Leicester Institute of the Earth's Crust Siberian Branch Russian Academy of Sciences Institute of Geology Mongolian Academy of Sciences

Tracing the closure of oceans with irregular margins and the formation of an orocline are crucial for understanding plate reconstruction and continental *** eastern Central Asian Orogenic Belt,where the Mongol-Okhotsk orocline is situated,is one of the world’s largest magmatic *** a large data set of U-Pb zircon ages,we updated the timing of many published igneous rocks,which allowed us to recognize tightly ’folded’ linear Carboniferous-Jurassic magmatic belts that wrap around the Mongol-Okhotsk suture and their migrations both sutureward and *** new successive magmatic belts reveal a rollback,scissor-like(or zipper-like) closure of the Mongol-Okhotsk Ocean that was fundamentally controlled by coeval subduction rollback and rotation of the Siberian and Mongolian-Erguna *** study also demonstrates the complex mechanisms and processes of the closure of an ocean with irregular margins and the formation of a consequent orocline.

关键词： magmatic migration ocean closure orocline Mongol-Okhotsk Ocean

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Valuations of Elemental Concentrations of Particle Matter in Ulaanbaatar, Mongolia

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Open Journal of Air Pollution 2016年第4期5卷 160-169页

作者： N. Amgalan T. narantsetseg D. Shagjjamva Department of Chemistry School of Arts and Science University of Mongolia Ulaanbaatar Mongolia Nuclear Research Center Ulaanbaatar Mongolia

This study focused on the contents of the air particulate matter pollution in two districts of Ulaanbaatar and determined the chemical composition of air borne samples and the source of those particles. Samples of fine and coarse fractions of PM were collected using a “Gent” stacked filter unit in two fractions of 0 - 2.2 μm and 2.2 - 10 μm sizes in two semi-residential areas from September 2012 to August 2013. This paper points out that fine and coarse concentration varied seasonally with meteorological changes. In sampling site 3, Zuun Ail (Figure 1) combustion generators generate the majority of pollution around 50.6% of household waste furnace to create high-temperature combustion of 21.6%. However, this net contributes to soil contamination near the lower value (5%) that arises around the vacuum environment in substantial amounts (14%), where is open around the buildings and residential areas, and the soil is considered to be due to the construction. But the data point to the highway in the distance, where is 9% of contamination of all vehicles’ smoke, and exhaust is similar to the data collected in Ulaanbaatar. According to analysis of samples of Nuclear Research Center (NRC) sampling site 2, it shows burning source of Particulate Matter 2.5 pollution in the air is around 25.5% of household waste furnace to create high-temperature product of combustion. But here the very high net contribution to the pollution of soil, is 31.6%. Today’s emerging dust is around 15.2%, showing that motor vehicle pollution causes 19.7%. Since the analysis was done on a sample-by-sample basis, it is possible to estimate the daily contributions of pollution sources and provide useful information based on a limited number of samples in order to address air quality management issues in Ulaanbaatar.

关键词： Pollution Emission Source Combustion Particulate Matter Dust Composition Elemental Concentrations

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蒙古牧场植物群落的组成、分布和环境驱动因素

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Journal of Plant Ecology 2023年第3期16卷 108-118页

作者： Kohei Suzuki Radnaakhand Tungalag Amartuvshin narantsetseg tsagaanbandi tsendeekhuu Masato Shinoda Norikazu Yamanaka Takashi Kamijo Faculty of Life and Environmental Sciences University of TsukubaTsukubaJapan Department of Biology School of Arts and SciencesNational University of MongoliaUlaanbaatarMongolia Botanic Garden and Research Institute Mongolian Academy of ScienceUlaanbaatarMongolia Graduate School of Environmental Studies Nagoya UniversityNagoyaJapan Arid Land Research Center Tottori UniversityTottoriJapan

在蒙古,过度放牧和由此导致的牧场退化仍是比较严重的问题。为解决牧场退化问题,我们试图以区域特征对蒙古牧场群落进行广泛的植被分类;此外,我们试图阐明群落的空间分布和分布的环境驱动因素。在2012-2016年,我们调查了蒙古不同地区的... 详细信息

在蒙古,过度放牧和由此导致的牧场退化仍是比较严重的问题。为解决牧场退化问题,我们试图以区域特征对蒙古牧场群落进行广泛的植被分类;此外,我们试图阐明群落的空间分布和分布的环境驱动因素。在2012-2016年,我们调查了蒙古不同地区的278个地块(10 m×10 m)的植被,这些地块的放牧压力相对于邻近地区较低。使用改进的双向指示物种分析方法(TWINSPAN),将数据分组为植被单元。然后,我们探讨了物种组成和群落分布的区域特征,以及分布与气候变量之间的关系。改进的TWINSPAN将植被数据分为3个集群,每个集群对应一种特定类型的带状植被(即森林草原、草原和沙漠草原)。干旱指数被确定为所有集群分布的重要驱动因素,而经度和海拔是集群组内集群分布的重要决定因素。与东部地区相比,西部地区具有更高的海拔和大陆性特征,在最潮湿的季度平均气温和降水量较低,导致集群组内的物种组成存在差异。物种组成的区域差异反映了植物地理起源的差异。因此,蒙古牧场群落的物种组成和分布模式框架与气候和地理因素相关。

关键词：旱地草原改良的TWINSPAN 植被

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再循环碳酸盐对蒙古国中部新生代玄武岩成因的影响:来自Mg-Zn同位素证据

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大地构造与成矿学 2023年

作者：王升鹏任钟元 tserendash narantsetseg 张庆霖中国科学院深地科学卓越创新中心中国科学院大学中国科学院广州地球化学研究所同位素地球化学国家重点实验室蒙古科学院地质研究所

玄武岩熔岩中的轻δ26Mg和重δ66Zn特征通常被认为是来自随板片俯冲进入并改造地幔的再循环碳酸盐组分,使得Mg-Zn同位素成为示踪再循环碳酸盐的强有力的工具。为了查明蒙古-鄂霍茨克洋俯冲可能携带的再循环碳酸盐物质与其对蒙古国中部... 详细信息

玄武岩熔岩中的轻δ26Mg和重δ66Zn特征通常被认为是来自随板片俯冲进入并改造地幔的再循环碳酸盐组分,使得Mg-Zn同位素成为示踪再循环碳酸盐的强有力的工具。为了查明蒙古-鄂霍茨克洋俯冲可能携带的再循环碳酸盐物质与其对蒙古国中部新生代玄武岩同位素和地球化学成分的控制作用,本文报道了来自蒙古-鄂霍茨克缝合带北部的蒙古国中部(Jargalant、Tariat、Togo和Orhon)新生代碱性玄武岩Mg-Zn同位素组成。这些玄武岩整体上显示低的δ26Mg值(–0.28‰～–0.43‰)和高的δ66Zn值(0.33‰～0.52‰),显著低于地幔Mg同位素(平均δ26Mg=-0.25‰±0.04‰)和高于地幔Zn同位素组成(平均δ66Zn=-0.18‰±0.05‰)。Mg-Zn同位素异常不能通过地表过程、岩浆分异演化及同位素扩散效应来解释,而是与碳酸盐化辉石岩部分熔融产生的同位素分馏效应相吻合。Mg-Zn-Sr同位素模拟结果表明,当辉石岩源区加入约5%～10%的再循环富镁碳酸盐可以很好地解释玄武岩的低δ26Mg和高δ66Zn。鉴于本研究火山区均位于蒙古-鄂霍茨克缝合带附近,再循环碳酸盐最可能来自古生代-中生代俯冲的蒙古-鄂霍茨克洋壳。玄武岩同位素和地球化学成分从南向北依次变化,即δ26Mg值、87Sr/86Sr、Ti/Ti*和Hf/Hf*比依次降低,δ66Zn值、Sm/Yb和La/Yb比依次升高。我们认为,随着俯冲深度的增加,更多的菱镁矿从俯冲板片释放。蒙古国中部新生代玄武岩的化学成分和同位素组成的变化主要受熔融深度和白云石/菱镁矿比例的共同控制。

关键词：玄武岩 Mg-Zn同位素再循环碳酸盐蒙古国中部蒙古-鄂霍次克洋

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