干旱区生态环境知识资源中心(Arid): Underestimated ~(14)C-based chronology of late Pleistocene high lake-level events over the Tibetan Plateau and adjacent areas: Evidence from the Qaidam Basin and Tengger Desert

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	Underestimated ~(14)C-based chronology of late Pleistocene high lake-level events over the Tibetan Plateau and adjacent areas: Evidence from the Qaidam Basin and Tengger Desert
	Long Hao; Shen Ji
来源期刊	Science China. Earth Sciences
ISSN	1674-7313
出版年	2015
卷号	58 期号:2 页码:183-194
英文摘要	The palaeolake evolution across the Tibetan Plateau and adjacent areas has been extensively studied, but the timing of late Pleistocene lake highstands remains controversial. Robust dating of lacustrine deposits is of importance in resolving this issue. This paper presents ~(14)C or optically stimulated luminescence (OSL) age estimates from two sets of late Quaternary lacustrine sequences in the Qaidam Basin and Tengger Desert (northeastern Tibetan Plateau). The updated dating results show: (1) the radiocarbon dating technique apparently underestimated the age of the strata of >30 ka BP in Qaidam Basin; (2) although OSL and 14C dating agreed with each other for Holocene age samples in the Tengger Desert area, there was a significant offset in dating results of sediments older than ~30 ka BP, largely resulting from radiocarbon dating underestimation; (3) both cases imply that most of the published radiocarbon ages (e.g., older than ~30 ka BP) should be treated with caution and perhaps its geological implication should be revaluated; and (4) the high lake events on the Tibetan Plateau and adjacent areas, traditionally assigned to MIS 3a based on 14C dating, are likely older than ~80 ka based on OSL chronology.
英文关键词	Tibetan Plateau lake highstand lacustrine sediments ~(14)C dating OSL dating
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5386286
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335468
作者单位	Long Hao, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, State Key Laboratory of Lake Sciences and Environment;;State Key Laboratory of Loess and Quaternary Geology, Nanjing, Jiangsu 210008, China.; Shen Ji, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, State Key Laboratory of Lake Sciences and Environment, Nanjing, Jiangsu 210008, China.
推荐引用方式 GB/T 7714	Long Hao,Shen Ji. Underestimated ~(14)C-based chronology of late Pleistocene high lake-level events over the Tibetan Plateau and adjacent areas: Evidence from the Qaidam Basin and Tengger Desert[J],2015,58(2):183-194.
APA	Long Hao,&Shen Ji.(2015).Underestimated ~(14)C-based chronology of late Pleistocene high lake-level events over the Tibetan Plateau and adjacent areas: Evidence from the Qaidam Basin and Tengger Desert.Science China. Earth Sciences,58(2),183-194.
MLA	Long Hao,et al."Underestimated ~(14)C-based chronology of late Pleistocene high lake-level events over the Tibetan Plateau and adjacent areas: Evidence from the Qaidam Basin and Tengger Desert".Science China. Earth Sciences 58.2(2015):183-194.