ISL OpenIR  > 青海盐湖研究所知识仓储
Holocene moist period recorded by the chronostratigraphy of a lakesedimentary sequence from Lake Tangra Yumco on the south Tibetan Plateau
Long, Hao; Lai, ZhongPing; Frenzel, Peter; Fuchs, Markus; Haberzettl, Torsten
2012
Source PublicationQUATERNARY GEOCHRONOLOGY
ISSN1871-1014
Volume10Pages:136-142
AbstractPalaeolimnological 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. 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.
KeywordOsl Dating Radiocarbon Dating Lake Sediments Tibetan Plateau
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/2043
Collection青海盐湖研究所知识仓储
Recommended Citation
GB/T 7714
Long, Hao,Lai, ZhongPing,Frenzel, Peter,et al. Holocene moist period recorded by the chronostratigraphy of a lakesedimentary 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 lakesedimentary 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 lakesedimentary sequence from Lake Tangra Yumco on the south Tibetan Plateau".QUATERNARY GEOCHRONOLOGY 10(2012):136-142.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Long, Hao]'s Articles
[Lai, ZhongPing]'s Articles
[Frenzel, Peter]'s Articles
Baidu academic
Similar articles in Baidu academic
[Long, Hao]'s Articles
[Lai, ZhongPing]'s Articles
[Frenzel, Peter]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Long, Hao]'s Articles
[Lai, ZhongPing]'s Articles
[Frenzel, Peter]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.