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dc.contributor.authorZhang, H. C.
dc.contributor.authorFan, H. F.
dc.contributor.authorChang, F. Q.
dc.contributor.authorZhang, W. X.
dc.contributor.authorLei, G. L.
dc.contributor.authorYang, M. S.
dc.contributor.authorLei, Y. B.
dc.contributor.authorYang, L. Q.
dc.date.accessioned2021-02-11T21:22:29Z
dc.date.available2021-02-11T21:22:29Z
dc.date.issued2008-01-01
dc.identifier.citationZhang, H. C., Fan, H. F., Chang, F. Q., Zhang, W. X., Lei, G. L., Yang, M. S., ... & Yang, L. Q. (2008). AMS dating on the shell bar section from Qaidam Basin, NE Tibetan Plateau, China. Radiocarbon, 50(2), 255-265.
dc.identifier.issn0033-8222
dc.identifier.doi10.1017/S0033822200033555
dc.identifier.urihttp://hdl.handle.net/10150/654135
dc.description.abstractRadiocarbon dating by accelerator mass spectrometry (AMS) of the shell bar section of Qaidam Basin, NE Tibetan Plateau, shows that this section was formed between ~39.7 and ~17.5 14C 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, 14C 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-13Corg) might also be used as critical references for checking the reliability of dates. For example, in 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-13Corg was lower than -23‰, 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 15~18 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.
dc.language.isoen
dc.publisherDepartment of Geosciences, The University of Arizona
dc.relation.urlhttp://radiocarbon.webhost.uits.arizona.edu/
dc.rightsCopyright © by the Arizona Board of Regents on behalf of the University of Arizona. All rights reserved.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleAMS Dating on the Shell Bar Section from Qaidam Basin, NE Tibetan Plateau, China
dc.typeArticle
dc.typetext
dc.identifier.journalRadiocarbon
dc.description.collectioninformationThe Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform February 2021
dc.source.volume50
dc.source.issue2
dc.source.beginpage255
dc.source.endpage265
refterms.dateFOA2021-02-11T21:22:29Z


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