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OSL chronology for lacustrine sediments recording high stands of Gahai Lake in Qaidam Basin, northeastern Qinghai-Tibetan Plateau
Fan, QiShun1,2; Lai, ZhongPing1; Long, Hao1,2; Sun, YongJuan1; Liu, XiangJun1,2
2010-04-01
Source PublicationQUATERNARY GEOCHRONOLOGY
Volume5Issue:2-3Pages:223-227
SubtypeArticle
AbstractThe Qaidam Basin in the northeastern Qinghai-Tibetan Plateau (QTP) is one of the largest hyper-arid intermontane basins in the northern hemisphere, and has abundant records for the study on palaeo-lake level fluctuations and palaeoclimatic changes. Significant efforts have been invested to define the timing of shoreline deposits using radiocarbon dating. However, due to the dating limit, the absence of organic materials and carbon reservoir effects for radiocarbon dating in arid areas, it is difficult to establish a reliable chronology for shoreline deposits. Therefore, controversy exists regarding the chronology for the high lake level in the Qaidam Basin, as well in the QTP. Some proposed that high lake levels occurred during late Marine Isotope Stage (MIS) 3, while others recently argued that the highest lake level in the QTP and adjacent regions existed in MIS 5. In Gahai Lake (now a salt lake), we investigated a section comprising lacustrine and shoreline deposits, which was about 25 m above the present lake level. Seven samples were collected for quartz optically stimulated luminescence (OSL) dating. A sample collected from a fine sand layer (the bottom of the section, and 12 m above the present lake level), which was assumed to have been deposited underwater, gave an OSL age of 82 +/- 8 ka. It suggested that the lake level was at least 12 m higher than present in late MIS 5. The high lake level could maintain till about 73 +/- 6 ka, and then decreased. This lake level decrease resulted in a gravel layer deposit between 73 +/- 6 and 63 +/- 6 ka (roughly during MIS 4). The lake level rose again (about 24 m above the present lake level) between 63 +/- 6 and 55 +/- 5 ka (roughly in early MIS 3). No lacustrine or shoreline deposits higher than the top of the current section were found around Gahai Lake. Thus, higher than present lake levels in Gahai Lake occurred in both late MIS 5 and early MIS 3. (C) 2009 Elsevier B.V. All rights reserved.
KeywordLuminescence Dating High Lake Levels Palaeoenvironmental Change Qaidam Basin Qinghai-tibetan Plateau
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordREGENERATIVE-DOSE PROTOCOL ; LATE QUATERNARY ; TENGGER DESERT ; NORTHWESTERN CHINA ; GROWTH CURVE ; NW CHINA ; LUMINESCENCE ; EVOLUTION ; DEPOSITS ; LOESS
Indexed BySCI ; ISTP
Language英语
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000276666900027
Citation statistics
Cited Times:48[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/5965
Collection青海盐湖研究所知识仓储
盐湖地质与环境实验室
科研管理、支撑部门
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Luminescence Dating Grp, Xining 810008, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Fan, QiShun,Lai, ZhongPing,Long, Hao,et al. OSL chronology for lacustrine sediments recording high stands of Gahai Lake in Qaidam Basin, northeastern Qinghai-Tibetan Plateau[J]. QUATERNARY GEOCHRONOLOGY,2010,5(2-3):223-227.
APA Fan, QiShun,Lai, ZhongPing,Long, Hao,Sun, YongJuan,&Liu, XiangJun.(2010).OSL chronology for lacustrine sediments recording high stands of Gahai Lake in Qaidam Basin, northeastern Qinghai-Tibetan Plateau.QUATERNARY GEOCHRONOLOGY,5(2-3),223-227.
MLA Fan, QiShun,et al."OSL chronology for lacustrine sediments recording high stands of Gahai Lake in Qaidam Basin, northeastern Qinghai-Tibetan Plateau".QUATERNARY GEOCHRONOLOGY 5.2-3(2010):223-227.
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