Holocene moist period recorded by the chronostratigraphy of a lake sedimentary sequence from Lake Tangra Yumco on the south Tibetan Plateau

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	Holocene moist period recorded by the chronostratigraphy of a lake sedimentary sequence from Lake Tangra Yumco on the south Tibetan Plateau
	Long, Hao 1,2,3; Lai, ZhongPing1 ; Frenzel, Peter 4; Fuchs, Markus 5; Haberzettl, Torsten 6
	2012-07-01
发表期刊	QUATERNARY GEOCHRONOLOGY
卷号	10 页码:136-142
关键词	Osl Dating Radiocarbon Dating Lake Sediments Tibetan Plateau Holocene Climate Change
摘要	Palaeolimnological studies together with geomorphological investigations of exposed lacustrine sections on the Tibetan Plateau provided valuable palaeoclimate records. Radiocarbon dating is the most commonly used method for establishing chronologies of lake sediments. However, C-14 dating of such sediments could be problematic due to the lack of organic matter or a reservoir effect, which commonly appears in radiocarbon ages of lacustrine sediments from the Tibetan Plateau. OSL dating is an alternative for dating the lake sediments and also provides the opportunity to independently test radiocarbon chronologies. The current study tries to compare OSL and C-14 dating results in order to evaluate the reservoir effect of C-14 dating, and then based on quartz OSL dating and stratigraphic analysis, to construct the chronostratigraphy of a lacustrine sedimentary sequence (TYC section), an offshore profile from Tangra Yumco lake on the southern Tibetan Plateau. Results suggest that: (1) it is possible to obtain robust OSL age estimates for these lake sediments and the OSL ages of the three samples range from ca. 7.6 ka to ca. 2.3 ka; (2) The discrepancy between the OSL and C-14 ages is ca. 4-5 ka, which possibly results from the age overestimate of C-14 dating due to a reservoir effect in the studied lake; (3) the chronostratigraphy of TYC section and sedimentological environmental analysis show a large lake with a lake level distinctively above the present during ca. 7.6-2.7 ka indicating a wet mid-Holocene in the study area. (C) 2011 Elsevier B.V. All rights reserved.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5653
专题	青海盐湖研究所知识仓储盐湖地质与环境实验室
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Luminescence Dating Grp, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Nanjing 210008, Jiangsu, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 4.Univ Jena, Inst Geosci, D-07749 Jena, Germany 5.Univ Giessen, Dept Geog, D-35390 Giessen, Germany 6.Univ Jena, Inst Geog, D-07743 Jena, Germany
推荐引用方式 GB/T 7714	Long, Hao,Lai, ZhongPing,Frenzel, Peter,et al. Holocene moist period recorded by the chronostratigraphy of a lake sedimentary sequence from Lake Tangra Yumco on the south Tibetan Plateau[J]. QUATERNARY GEOCHRONOLOGY,2012,10:136-142.
APA	Long, Hao,Lai, ZhongPing,Frenzel, Peter,Fuchs, Markus,&Haberzettl, Torsten.(2012).Holocene moist period recorded by the chronostratigraphy of a lake sedimentary sequence from Lake Tangra Yumco on the south Tibetan Plateau.QUATERNARY GEOCHRONOLOGY,10,136-142.
MLA	Long, Hao,et al."Holocene moist period recorded by the chronostratigraphy of a lake sedimentary sequence from Lake Tangra Yumco on the south Tibetan Plateau".QUATERNARY GEOCHRONOLOGY 10(2012):136-142.