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题名: AMS dating on the shell bar section from Qaidam Basin, NE Tibetan Plateau, China
作者: Zhang, HC; Fan, HF; Chang, FQ; Zhang, WX; Lei, GL; Yang, MS; Lei, YB; Yang, LQ
收录类别: SCIE
出版日期: 2008
刊名: RADIOCARBON
卷号: 50, 期号:2, 页码:255-265
出版者: UNIV ARIZONA
出版地: TUCSON
英文摘要: Radiocarbon dating by accelerator mass spectrometry (AMS) of the shell bar section of Qaidam Basin, NE Tibetan Plateau, shows that this section was formed between similar to 39.7 and similar to 17.5 C-14 kyr BP and represented the highest paleolake development period since the Late Pleistocene. It was difficult to obtain reliable dates due to the low organic carbon content, which was formed mainly by authochtonous algae-bacteria (Zhang et al. 2007a). In order to improve the dating, C-14 ages of both the alkali residual and acid-soluble components of the organic carbon were measured to check the consistency of the dating results. Total organic carbon (TOC) content and stable carbon isotopes (delta C-13(org)) might also be used as critical references for checking the reliability of dates. For example. ill Our study of the shell bar section from Qaidam Basin, we found that when the TOC content was higher than 0. 15% and/or delta C-13(org) was lower than -23 parts per thousand, the AMS dates were reliable. AMS dating of fossil shells demonstrated that they could provide Valuable age information. The ages given by fossil shells are comparable to those of bulk carbonate from a similar sampling site, and are about 15 similar to 18 kyr older than the ages given by organic matter. Due to the U/Th dating requirements and open nature of the system, we concluded that U/Th dating results are unreliable and that this technique is unsuitable for dating halite deposits from Qaidam Basin.
作者部门: Lanzhou Univ, Coll Earth Sci & Environm, Lanzhou 730000, Peoples R China ; Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China
学科分类: Geochemistry & Geophysics
文章类型: Article
语种: 英语
ISSN号: 0033-8222
WOS记录号: WOS:000259091600006
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/119815
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Zhang, HC,Fan, HF,Chang, FQ,et al. AMS dating on the shell bar section from Qaidam Basin, NE Tibetan Plateau, China[J]. RADIOCARBON,2008,50(2):255-265.
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