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题名: Climate changes of the northeastern Tibetan Plateau since the late glaciation inferred from clay mineralogy of sediments in Kuhai Lake
作者: Sun, QF; Colin, C; Liu, ZF; Mischke, S; Duchamp-Alphonse, S; Zhang, CJ; Chen, FH(陈发虎)
收录类别: SCIE
出版日期: 2017-06-08
刊名: QUATERNARY INTERNATIONAL
卷号: 440, 页码:24-34
出版者: ELSEVIER
出版地: OXFORD
英文摘要: A high-resolution study of clay mineralogy has been carried out on a sediment core recovered from Kuhai Lake in order to investigate climatic and environmental changes in the northeastern Tibetan Plateau since the late glacial period. Clay mineralogy reveals significant changes in sedimentary sources and hydrolysis conditions in the Kuhai Lake catchment area. Before 14.9 cal ka BP, the predominance of illite and relatively high amount of kaolinite, derived mainly from the reworking of sedimentary rocks, imply unstable cold-arid conditions and significant glacier cover that prevented from weathering of metamorphic and mafic rocks in the high relief of the catchment. Between 14.9 and 5.4 cal ka BP, an increase in smectite and chlorite contents associated with relatively low values of the illite chemistry index indicate that clay minerals derived from the weathering of metamorphic and volcanic rocks in the highlands of the catchment area. Such modifications were triggered by a melting of glaciers in the lake's catchment during the Bolling-Allerod interstadial, followed by an intensification of monsoon precipitations in the early Holocene (around 10.0 cal ka BP). Both processes are responsible for significant physical erosion in the highlands together with an efficient transport of smectite and chlorite from areas of high relief to the lake. After 5.4 cal ka BP, lower smectite and chlorite proportions, associated with a predominance of Al-rich illite and kaolinite, indicate a return to relatively dry conditions and a lowering of physical erosion in the drainage basin. Comparison between clay mineralogy and pollen records indicates that variations in weathering intensity in the Kuhai Lake catchment area and changes in its surrounding vegetation are synchronous, demonstrating the large potential of clay mineralogical analysis to trace climate change of the Tibetan Plateau. (C) 2016 Elsevier Ltd and INQUA. All rights reserved.
关键词: Northeastern Tibetan Plateau ; Weathering ; Clay mineralogy ; Pollen ; Monsoon rainfall ; Mountain glaciers
作者部门: [Sun, Qingfeng] Northwest Normal Univ, Fac Geog, Lanzhou 730070, Peoples R China ; [Colin, Christophe ; Duchamp-Alphonse, Stephanie] Univ Paris Saclay, Univ Paris Sud, UMR 8148, Lab Geosci Paris Sud,CNRS, Batiment 504, F-91405 Orsay, France ; [Liu, Zhifei] Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China ; [Mischke, Steffen] Univ Iceland, Fac Earth Sci, Sturlugata 7, IS-101 Reykjavik, Iceland ; [Zhang, Chengjun] Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China ; [Zhang, Chengjun] Lanzhou Univ, Key Lab Mineral Resources Western China, Lanzhou 730000, Peoples R China ; [Chen, Fahu] Lanzhou Univ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China
通讯作者: Sun, QF (reprint author), Northwest Normal Univ, Fac Geog, Lanzhou 730070, Peoples R China.
学科分类: Physical Geography; Geology
文章类型: Article
所属项目编号: Natural Science Foundation of China [41061022] ; German Research Foundation (Deutsche Forschungsgemeinschaft DFG) [Mi 730/16-1] ; French- Chinese International Associated Laboratories (LIA) project MONOCL
所属项目名称: 国家自然科学基金项目 ; 德国科学基金会项目
项目资助者: NSFC ; DFG
语种: 英语
DOI: 10.1016/j.quaint.2016.08.009
ISSN号: 1040-6182
WOS记录号: WOS:000404315300003
IR记录号: WOS:000404315300003
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/189885
Appears in Collections:资源环境学院_期刊论文

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作者单位: 12ENVIROM

Recommended Citation:
Sun, QF,Colin, C,Liu, ZF,et al. Climate changes of the northeastern Tibetan Plateau since the late glaciation inferred from clay mineralogy of sediments in Kuhai Lake[J]. QUATERNARY INTERNATIONAL,2017,440:24-34.
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