Th-230 dating of stem carbonate deposits from Tai Cuo lake, western;Tibetan Plateau, China

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	Th-230 dating of stem carbonate deposits from Tai Cuo lake, western;Tibetan Plateau, China
	Ma, Nina 4; Ma, Zhibang ; Zheng, Mianping ; Wang, Hailei
刊名	QUATERNARY INTERNATIONAL
	2012
卷号	250 页码:55-62
ISSN号	899IY
英文摘要	The saline lake Tai Cuo, located in western Tibetan Plateau, China, is a closed endorheic basin mainly recharged by meteoric water and groundwater. Carbonate sediments, mainly showing stem structure, are extensively developed in the first terrace of Tai Cuo lake area and are over 3 m thick. The U-series method has been applied to those carbonate deposits. Sieved carbonates samples, smaller than 0.595 mm (#30) and larger than 0.177 mm (#80), were the research object for Th-230 dating. The results indicate that the uranium contents are high, up to 6 similar to 14 ppm, and activity ratios of U-234/U-238 range from 1.533 at the top to 1.437 at the base of the succession, indicating that the sedimentary environment was relatively stable during the period. Ages obtained with precision of 1 similar to 3% have recorded environmental evolution history in this area during the period 13,340 similar to 5200 yr BP, with an error bar of only 240 similar to 89 yr, and are consistent with the lithological deposition sequence and greatly improved compared to previously published Th-230 chronologies. This chronology will be of great importance for interpreting the environmental changes in the study area. (C) 2011 Elsevier Ltd and INQUA. All rights reserved.
学科主题	沉积学与沉积岩
WOS关键词	TOTAL-SAMPLE DISSOLUTION ; U-SERIES CHRONOLOGY ; IMPURE CARBONATES ; SOUTHEAST SPAIN ; SORBAS BASIN ; BALIKUN LAKE ; SALT LAKE ; KA BP ; EVOLUTION ; HOLOCENE
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
语种	英语
出版者	This study was jointly supported by the National Natural Science;Foundation of China Grants 40531002 and 40872207, and China Geological;Survey's project (1212010818657). We are grateful to Professor Xiaoping;Yang and Fanjing Kong for their advice on the draft paper. Sincere;thanks are extended to the Editor-in-Chief Professor Norm R. Catto and;anonymous reviewers for much-appreciated comments and editorial advice.
WOS记录号	WOS:000300810800007
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39524]
专题	中国地质科学院矿产资源研究所
作者单位	1.CAGS, Inst Mineral Resources, MLR Key Lab Saline Lake Resources & Environm, Beijing 100037, Peoples R China. 2.CAGS, R&D Ctr Saline Lake & Epithermal Deposit, Beijing 100037, Peoples R China. 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China. 4.中国地质科学院矿产资源研究所
推荐引用方式 GB/T 7714	Ma, Nina,Ma, Zhibang,Zheng, Mianping,et al. Th-230 dating of stem carbonate deposits from Tai Cuo lake, western;Tibetan Plateau, China[J]. QUATERNARY INTERNATIONAL,2012,250:55-62.
APA	Ma, Nina,Ma, Zhibang,Zheng, Mianping,&Wang, Hailei.(2012).Th-230 dating of stem carbonate deposits from Tai Cuo lake, western;Tibetan Plateau, China.QUATERNARY INTERNATIONAL,250,55-62.
MLA	Ma, Nina,et al."Th-230 dating of stem carbonate deposits from Tai Cuo lake, western;Tibetan Plateau, China".QUATERNARY INTERNATIONAL 250(2012):55-62.