Underestimated 14C-based chronology of late Pleistocene highlake-level events over the Tibetan Plateau and adjacent areas:Evidence from the Qaidam Basin and Tengger Desert
Hao,L(Hao,Long)[1,2]; Ji,S(Ji,Shen)[1]
2015-02
发表期刊Science China Earth Science
卷号58期号:2页码:183-194
文章类型期刊论文
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 C-14 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 C-14 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 similar to 30 ka BP, largely resulting from radiocarbon dating underestimation; (3) both cases imply that most of the published radiocarbon ages (e.g., older than similar to 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 C-14 dating, are likely older than similar to 80 ka based on OSL chronology.

关键词Tibetan Plateau Lake Highstand Lacustrine Sediments 14c Dating Osl Dating
DOI10.1007/s11430-014-4993-2
收录类别SCI
语种英语
引用统计
被引频次:27[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9540
专题黄土与第四纪地质国家重点实验室(2010~)
作者单位1.State Key Laboratory of Lake Sciences and Environment, Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences, Nanjing 210008, China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment,Chinese Academy of Sciences, Xi’an 710075, China
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Hao,L,Ji,S. Underestimated 14C-based chronology of late Pleistocene highlake-level events over the Tibetan Plateau and adjacent areas:Evidence from the Qaidam Basin and Tengger Desert[J]. Science China Earth Science,2015,58(2):183-194.
APA Hao,L,&Ji,S.(2015).Underestimated 14C-based chronology of late Pleistocene highlake-level events over the Tibetan Plateau and adjacent areas:Evidence from the Qaidam Basin and Tengger Desert.Science China Earth Science,58(2),183-194.
MLA Hao,L,et al."Underestimated 14C-based chronology of late Pleistocene highlake-level events over the Tibetan Plateau and adjacent areas:Evidence from the Qaidam Basin and Tengger Desert".Science China Earth Science 58.2(2015):183-194.
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