Study on chronology for hot spring typed Cs-deposit of Targjia, Tibet

	Study on chronology for hot spring typed Cs-deposit of Targjia, Tibet
	Zhao, YY ; Zhao, XT ; Ma, ZB
刊名	ACTA PETROLOGICA SINICA
	2006-03-01
卷号	22 期号:3 页码:717-724
关键词	hot spring typed Cs-deposit U-series dating Middle-Late Quaternary stages of thermal sinter activity Targjia in Tibet
ISSN号	1000-0569
文献子类	Article
英文摘要	Targjia thermal field, a large scale Cs-deposit, is situated at a source of Raka Zangbo R., a tributary of Yarlung Zsangpo River. Sinter with different characteristics is distributed on the surface and in the fracture of moraine in Gangdise Glacial Period, or covered on different terraces (T-1-,T-5) and river bed of Changmaqu River. Based on geomorphic distribution and petrologic features, sinter can be divided into 6 suites. Suite 1 is travertine and the others are geyserite. At present, there is no better method to date for Quaternary sinter, especially geyserite. Before this paper, there are five ESR dates from Targiia geyserite. But we do not know fully about their geomorphic distribution of sampling sites. Two methods of U-series dating, bulk analysis of a whole-sample and total-sample-dissolution isochron techniques ( i. e., TSD scheme), are used in this paper. Chronologic explanation with geomorphic distribution is given as the following: Suite I is formed in late stage of interstade in the Last Glaciation of the late Late Pleistocene, i. e. MIS 3. Suite 2, the Penultimate Glacial Period of the late Middle Pleistocene, MIS 8 similar to 7. Suite 3, the Last Interglacial Period in the early Late Pleistocene, MIS 5. Suite 4, during the late stage of interstade of the Last Glaciation and the early stage of Last Glacial Maximum in the late Late Pleistocene, MIS 3 similar to 2. Suite 5, the Last Glacial Maximum of the late Late Pleistocene and the Postglacial period of the Holocene, MIS 2 similar to 1. Suite 6 is existing geyserite. Refering to ESR dates from other scientists, this paper thinks that the Targjia thermal sinter is formed in five stages: 403 similar to 202ka BP, about 99ka BP, 39 similar to 25ka BP, 17 similar to 4ka BP and the present. In the early period of stage 3, there was a activity of travertine.
WOS关键词	U-SERIES CHRONOLOGY ; QUATERNARY FLUCTUATIONS ; LAKE ; STROMATOLITES ; CHINA ; TH/U
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000237332500021
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/66602]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhao, YY
作者单位	1.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhao, YY,Zhao, XT,Ma, ZB. Study on chronology for hot spring typed Cs-deposit of Targjia, Tibet[J]. ACTA PETROLOGICA SINICA,2006,22(3):717-724.
APA	Zhao, YY,Zhao, XT,&Ma, ZB.(2006).Study on chronology for hot spring typed Cs-deposit of Targjia, Tibet.ACTA PETROLOGICA SINICA,22(3),717-724.
MLA	Zhao, YY,et al."Study on chronology for hot spring typed Cs-deposit of Targjia, Tibet".ACTA PETROLOGICA SINICA 22.3(2006):717-724.