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Age and extent of a giant glacial-dammed lake at Yarlung Tsangpo gorge in the Tibetan Plateau
Liu WM(刘维明)1,2; Zhongping Lai2; Kaiheng Hu1; Yonggang Ge1; Peng Cui1; Xiaogang Zhang1; Feng Liu3
Corresponding AuthorWeiming Liu ; Zhongping Lai
2015
Source PublicationGEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
Volume246Pages:370-376
SubtypeArticle
AbstractMany glacier dams on major rivers at the southeastern edge of the Tibetan Plateau had been previously determined through remote sensing and glacier terminal position calculation. It was hypothesized that such damming substantially impeded river incision into the plateau interior. Investigation on the large glacial-dammed lake at the entrance of Tsangpo gorge is critical for understanding this hypothesis. So far, the issues, such as age, lake surface elevation, and stages of this dammed lake, are still in debate. Our field survey of lacustrine deposits and loess distribution along the middle Yarlung Tsangpo River and its tributary, Nyang River, suggested that the lake surface elevation was at about 3180 m asl. The 23 quartz optically stimulated luminescence (OSL) and 4 organic AMS 14C ages all fall into the Last Glacial period (~ 41–13 ka). The OSL and 14C ages are in general agreement with each other where applicable. There might be only one long damming event because the ages of lacustrine deposits from 2970 to 3100 m asl are similar, and every lacustrine section is sustained for a long time. The estimated lake surface area was 1089 km2, and the volume was ~ 170 km3, which differ from previous estimations which suggested two-stage (about early Holocene and 1.5 ka) lakes, and the largest lake surface elevation reached 3500 m.
KeywordLuminescence And Radiocarbon Dating Glacial-dammed Lake Yarlung Tsangpo Gorge Tibetan Plateau
Subject Area地球科学 ; 地理学 ; 地质学
DOIdoi:10.1016/j.geomorph.2015.06.034
URL查看原文
Indexed BySCI
Language英语
Quartile2区
TOP
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/10013
Collection山地灾害与地表过程重点实验室
Affiliation1.CAS Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, 610041 Chengdu, China
2.School of Earth Sciences, China University of Geosciences, 430074 Wuhan, China
3.Institute of Geomechanics, Chinese Academy of Geological Sciences, 100081 Beijing, China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
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Liu WM,Zhongping Lai,Kaiheng Hu,et al. Age and extent of a giant glacial-dammed lake at Yarlung Tsangpo gorge in the Tibetan Plateau[J]. GEOMORPHOLOGY,2015,246:370-376.
APA Liu WM.,Zhongping Lai.,Kaiheng Hu.,Yonggang Ge.,Peng Cui.,...&Feng Liu.(2015).Age and extent of a giant glacial-dammed lake at Yarlung Tsangpo gorge in the Tibetan Plateau.GEOMORPHOLOGY,246,370-376.
MLA Liu WM,et al."Age and extent of a giant glacial-dammed lake at Yarlung Tsangpo gorge in the Tibetan Plateau".GEOMORPHOLOGY 246(2015):370-376.
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