U-series chronology of sediments associated with Late Quaternary fluctuations, Balikun Lake, northwestern China

doi:10.1016/j.quaint.2004.01.025

	U-series chronology of sediments associated with Late Quaternary fluctuations, Balikun Lake, northwestern China
	Ma, ZB ; Wang, ZH ; Liu, JQ ; Yuan, BY ; Xiao, JL ; Zhang, GP
刊名	QUATERNARY INTERNATIONAL
	2004
卷号	121 页码:89-98
ISSN号	1040-6182
DOI	10.1016/j.quaint.2004.01.025
文献子类	Article
英文摘要	The U-series dating method was used to date the sediment core B(1)94 from Balikun Lake, Xinjiang, northwestern China. The samples were extracted with acids of different concentrations, and Th-230/Th-232 and U-214/Th-232 ratios of each sample were measured. Contamination with non-radiogenic Th-230 can be overcome in most instances using an isochron correction scheme for a sequential acid-leach procedure. The method can provide the most reliable dates from samples in lake of the arid-semiarid regions, where carbonate is assumed close to uranium and thorium after deposition. Where three known ages of palaeomagnetic reversals have already been obtained in the same core, the U-series ages appear to compare reasonably well with palaeomagnetic event ages. Based on the U-series chronology and stable isotope records, lake level history was reconstructed, which suggests that Balikun has been a shallow saline lake since 150 ka BP, and its level frequently changed in response to climate changes. Arid climates occurred between 129-71 ka BP and at 62-25 ka BP, corresponding to marine oxygen isotopic stages (OIS) 5 and 3, during which times Balikun Lake approached playa conditions. After 13 ka BP, the lake shrank and became a saline field and mudflat with a water table at or below the lake bed. Three major high lake stands were identified at about ca. 138-132, 69-65, and 25-18 ka BP, and the three high stand periods correspond to OIS 6, 4 and 2. Rising lake levels during the penultimate glaciation and both stades of the Last Glaciation might have resulted from the location of the lake in an and region, where the climate was controlled mainly by the westerly winds. (C) 2004 Elsevier Ltd and INQUA. All rights reserved.
WOS关键词	DEAD-SEA BASIN ; IMPURE CARBONATES ; PYRAMID LAKE ; CALIFORNIA ; CLIMATE ; AGES ; DEPOSITS ; TH-230/U ; LAHONTAN ; VALLEY
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000222222900009
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/64592]
专题	中国科学院地质与地球物理研究所
通讯作者	Ma, ZB
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Engn, Div Civil Hydraul Engn & Architecture, Beijing 100038, Peoples R China 3.Chinese Acad Sci, Inst Remote Sensing Applicat, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Ma, ZB,Wang, ZH,Liu, JQ,et al. U-series chronology of sediments associated with Late Quaternary fluctuations, Balikun Lake, northwestern China[J]. QUATERNARY INTERNATIONAL,2004,121:89-98.
APA	Ma, ZB,Wang, ZH,Liu, JQ,Yuan, BY,Xiao, JL,&Zhang, GP.(2004).U-series chronology of sediments associated with Late Quaternary fluctuations, Balikun Lake, northwestern China.QUATERNARY INTERNATIONAL,121,89-98.
MLA	Ma, ZB,et al."U-series chronology of sediments associated with Late Quaternary fluctuations, Balikun Lake, northwestern China".QUATERNARY INTERNATIONAL 121(2004):89-98.