Quaternary lake deposits of Nam Co, Tibet, with a discussion of the;connection of Nam Co with Ring Co-Jiuru Co

	Quaternary lake deposits of Nam Co, Tibet, with a discussion of the;connection of Nam Co with Ring Co-Jiuru Co
	Zhu, DA 3; Zhao, XT ; Meng, XA ; Wu, ZH ; Wu, ZH ; Feng, XY ; Shao, ZG ; Liu, QS ; Yang, ML
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2002
卷号	76 期号:3 页码:283-291
关键词	Tibet Nam Co Quaternary lake deposits old large lake
ISSN号	1000-9515
英文摘要	Shorelines are widespread and lake deposits and lake geomorphology are well developed on the northern Tibetan Plateau. Through field observations of lacustrine deposits of Nam Co-the highest and largest Quaternary lake in Tibet, the authors found four-step shore terraces composed of sands and clays with well-developed horizontal bedding and 3-12 m, 15-22 m, 25-30 m and 35-45 m higher than the lake surface respectively, lacustrine deposits resting on the bedrocks and 60-150 m higher than the lake surface, and up to similar to50 levees composed of oblate lakeshore gravels. Moreover they found lacustrine and lakeshore deposits making up the terraces and levees on the bottoms of wide dividing valleys connecting Nam Co with the Rencoyuema, Rencogongma and Jiuru Co northwest of Nam Co (the valley bottoms are 20 m, 90 m and 60 m higher than the above-mentioned three lakes) and on slopes north of it, i.e. terraces II and III of Nam Co. Thus they confirm that Nam Co and Ring Co-Jiuru Co had connected with each other several times, i.e. formed a unified large lake several times, rather than had been different lakes connected only by river channels. From indications such as the distribution of the highest shoreline and lake deposits and geomorphology, the authors conclude that the total area of the old large lakes on the northern Tibetan Plateau is a few times larger than that of the modem lakes and that the last-stage old large lakes formed in the interglacial interval of the last glaciation.
学科主题	第四纪地质
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC CHINA
WOS记录号	WOS:000179589700002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37543]
专题	中国地质科学院
作者单位	1.Chinease Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China. 2.Chinease Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China. 3.中国地质科学院地质力学研究所
推荐引用方式 GB/T 7714	Zhu, DA,Zhao, XT,Meng, XA,et al. Quaternary lake deposits of Nam Co, Tibet, with a discussion of the;connection of Nam Co with Ring Co-Jiuru Co[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2002,76(3):283-291.
APA	Zhu, DA.,Zhao, XT.,Meng, XA.,Wu, ZH.,Wu, ZH.,...&Yang, ML.(2002).Quaternary lake deposits of Nam Co, Tibet, with a discussion of the;connection of Nam Co with Ring Co-Jiuru Co.ACTA GEOLOGICA SINICA-ENGLISH EDITION,76(3),283-291.
MLA	Zhu, DA,et al."Quaternary lake deposits of Nam Co, Tibet, with a discussion of the;connection of Nam Co with Ring Co-Jiuru Co".ACTA GEOLOGICA SINICA-ENGLISH EDITION 76.3(2002):283-291.