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Mineral magnetic study of lacustrine sediments from Lake Pumoyum Co, southern Tibet, over the last 19 ka and paleoenvironmental significance

文献类型：期刊论文

作者Su, Youliang1,3; Gao, Xing2; Liu, Qingsong3; Wang, Junbo4; Haberzettl, Torsten5; Zhu, Liping4; Li, Jinhua3; Duan, Zongqi3; Tian, Lide4
刊名TECTONOPHYSICS
出版日期2013-03-11
卷号588页码:209-221
关键词Environmental magnetism Lake sediments Pumoyum Co Tibetan Plateau Paleoenvironment
ISSN号0040-1951
DOI10.1016/j.tecto.2012.12.017
文献子类Article
英文摘要High-resolution proxy records from Tibetan Plateau are essential to understand the past climatic and environmental changes. In this work, we conducted systematic environmental magnetic studies on lacustrine sediments from Lake Pumoyum Co, southern Tibet, spanning from the last deglaciation (similar to 19 ka) to present. We correlated the magnetic proxies in the lake core with environmental changes. The magnetic proxies from the 3 units were studied. Both Unit 3 (19-13.2 ka) and Unit 2 (13.2-8.4 Ica) contain evidences for an anoxic or sub-anoxic environment. Fine-grained greigite dominates the bulk magnetic properties of Unit 3, while both magnetite and greigite coexist in Unit 2. Overall, this reveals a transition from an anoxic environment to an oxic environment. In contrast, Unit 1 (8.4 ka-present) spans the Holocene when the lake environment was oxic. There is an increasing trend in the concentration of magnetic minerals, which reflects an increasing transport of magnetic minerals from the catchment into the lake due to the increased post-glacial melt-water flow. Although different mechanisms affect the magnetic assemblage and associated magnetic properties in the different units, our results suggest that the magnetic proxies of the local lake environment on southern Tibet are sensitive to environmental changes. (C) 2012 Elsevier B.V. All rights reserved.
WOS关键词OXYGEN-ISOTOPE RECORD ; GRAIN-SIZE ; MAGNETOTACTIC BACTERIA ; ENVIRONMENTAL-CHANGES ; MARINE-SEDIMENTS ; NEW-ZEALAND ; DIAGENETIC FORMATION ; ROCK MAGNETISM ; WESTERN TIBET ; ASIAN MONSOON
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000319310700015
出版者ELSEVIER SCIENCE BV
资助机构National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; 41025013 ; 41025013 ; 41025013 ; 41025013 ; 40871099) ; 40871099) ; 40871099) ; 40871099) ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; 41025013 ; 41025013 ; 41025013 ; 41025013 ; 40871099) ; 40871099) ; 40871099) ; 40871099) ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; 41025013 ; 41025013 ; 41025013 ; 41025013 ; 40871099) ; 40871099) ; 40871099) ; 40871099) ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; National Nature Science Foundation of China (NSFC)(40874033 ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; 41025013 ; 41025013 ; 41025013 ; 41025013 ; 40871099) ; 40871099) ; 40871099) ; 40871099)
源URL[http://ir.iggcas.ac.cn/handle/132A11/86778]  
专题中国科学院地质与地球物理研究所
通讯作者Gao, Xing
作者单位1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut SKL LE, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100085, Peoples R China
5.Friedrich Schiller Univ Jena, Inst Geog, D-07743 Jena, Germany
推荐引用方式
GB/T 7714		 Su, Youliang,Gao, Xing,Liu, Qingsong,et al. Mineral magnetic study of lacustrine sediments from Lake Pumoyum Co, southern Tibet, over the last 19 ka and paleoenvironmental significance[J]. TECTONOPHYSICS,2013,588:209-221.
APA Su, Youliang.,Gao, Xing.,Liu, Qingsong.,Wang, Junbo.,Haberzettl, Torsten.,...&Tian, Lide.(2013).Mineral magnetic study of lacustrine sediments from Lake Pumoyum Co, southern Tibet, over the last 19 ka and paleoenvironmental significance.TECTONOPHYSICS,588,209-221.
MLA Su, Youliang,et al."Mineral magnetic study of lacustrine sediments from Lake Pumoyum Co, southern Tibet, over the last 19 ka and paleoenvironmental significance".TECTONOPHYSICS 588(2013):209-221.

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来源：地质与地球物理研究所

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