气候变化领域集成服务门户(CCPortal): Sedimentary records of a palaeo-lake in the middle Yarlung Tsangpo: Implications for terrace genesis and outburst flooding

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DOI	10.1016/j.quascirev.2018.05.037
	Sedimentary records of a palaeo-lake in the middle Yarlung Tsangpo: Implications for terrace genesis and outburst flooding
	Hu, Hai-Ping; Feng, Jin-Liang; Chen, Feng
通讯作者	Feng, JL (通讯作者)
发表日期	2018
ISSN	0277-3791
起始页码	135
结束页码	148
卷号	192
英文摘要	The middle reaches region of the Yarlung Tsangpo in the southern Tibetan Plateau consist of broad valley reaches, alternating with gorges, which were easily dammed by glaciers and/or glacial moraines during the last glacial period. We investigated three palaeo-lake sedimentary sequences on terraces located in the broad Xigaze valley reach and the Dazhuka-Yueju gorge in the middle reaches of the Yarlung Tsangpo. We found that the altitude of the palaeo-lake was 3811 m above sea level, while its minimum area and volume were similar to 679 km(2) and similar to 22 km(3), respectively. The palaeo-lake was formed during the period from about 30.2 to 32.3 cal. kyr BP, and it failed at about 13.2 cal. kyr BP. The dam was possibly located at the eastern end of the Dazhuka-Yueju gorge and may have been a glacier and/or a moraine during the late part of the last glacial. The failure of the dam and related flooding from the Dazhuka-Yueju gorge probably triggered a chain reaction of dam failures downstream, forming a megaflood. Terrace genesis and valley evolution in the investigated region can be divided into four phases: Phase I (>32.3 cal. kyr BP), river occupation; Phase II (<32.3-13.2 cal. kyr BP), palaeo-lake occupation; Phase III (after 13.2 cal. kyr BP), erosion and aeolian deposition; Phase IV, modern downward incision. (C) 2018 Elsevier Ltd. All rights reserved.
关键词	C-14 YR BP YOUNGER DRYAS TIBETAN-PLATEAU DAMMED LAKE LATE PLEISTOCENE NORTHERN-HEMISPHERE LOESS SEDIMENTATION CHANNELED SCABLANDS SOUTHEASTERN TIBET OCEAN CIRCULATION
英文关键词	Yarlung Tsangpo; Glacier constrained lake; Lake sediments; Terrace; Aeolian deposits
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000438179800010
来源期刊	QUATERNARY SCIENCE REVIEWS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259177
推荐引用方式 GB/T 7714	Hu, Hai-Ping,Feng, Jin-Liang,Chen, Feng. Sedimentary records of a palaeo-lake in the middle Yarlung Tsangpo: Implications for terrace genesis and outburst flooding[J]. 中国科学院青藏高原研究所,2018,192.
APA	Hu, Hai-Ping,Feng, Jin-Liang,&Chen, Feng.(2018).Sedimentary records of a palaeo-lake in the middle Yarlung Tsangpo: Implications for terrace genesis and outburst flooding.QUATERNARY SCIENCE REVIEWS,192.
MLA	Hu, Hai-Ping,et al."Sedimentary records of a palaeo-lake in the middle Yarlung Tsangpo: Implications for terrace genesis and outburst flooding".QUATERNARY SCIENCE REVIEWS 192(2018).