An assessment and comparison of Th-230 and AMS C-14 ages for lacustrine sediments from Qarhan Salt Lake area in arid western China

doi:10.1007/s12665-013-2526-5

	An assessment and comparison of Th-230 and AMS C-14 ages for lacustrine sediments from Qarhan Salt Lake area in arid western China
	Fan, QiShun 1; Ma, HaiZhou 1; Ma, ZhiBang 2; Wei, HaiCheng 1; Han, FengQing 1
刊名	ENVIRONMENTAL EARTH SCIENCES
	2014-02-01
卷号	71 期号:3 页码:1227-1237
关键词	Th-230 and AMS C-14 dating The forming timing of the bottom salt layer Qarhan Salt Lake Qaidam Basin
ISSN号	1866-6280
DOI	10.1007/s12665-013-2526-5
文献子类	Article
英文摘要	The age framework of Qarhan Salt Lake in arid western China is still controversial due in part to (1) age discrepancy between conventional C-14 and Th-230 dating results, and (2) no AMS C-14 ages of organic carbon from drilling cores in Qarhan Salt Lake were reported until now. In order to discuss these chronological problems, upper 54.50 m lacustrine sediments from a drilling core (ISL1A) recovered from Qarhan Salt Lake were dated based on Th-230 and AMS C-14 dating techniques. Results show that (1) AMS C-14 ages of total organic carbon (TOC) from 4.65 to 30.29 m are almost in stratigraphic order and consistent with Th-230 ages of halite in the corresponding layers; (2) AMS C-14 ages of TOC from 30.29 to 54.50 m are younger with increasing depth. This phenomenon was also found in Shell Bar in the study area, suggesting that AMS C-14 ages from upper 30.29 m are more reliable while those from lower 24.21 m in ISL1A may be underestimated; (3) Th-230 ages of halite from lower 24 m lacustrine sediments are obviously older than AMS C-14 ages of TOC in the corresponding layers, which results into different age framework of salt lake sediments in Qarhan Salt Lake; (4) if extrapolating these reliable AMS C-14 ages in ISL1A, similar age framework with Th-230 ages in this core confirms that Th-230 ages are much close to the true ages of these sediments, which suggests that the forming timing of the bottom salt layer is similar to 50 ka.
WOS关键词	TIBETAN PLATEAU ; QAIDAM BASIN ; NW CHINA ; NORTHWESTERN CHINA ; MASS-SPECTROMETRY ; STABLE-ISOTOPES ; CLIMATIC-CHANGE ; QINGHAI LAKE ; CENTRAL-ASIA ; PLAYA LAKE
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000330124100021
资助机构	National Natural Science Foundation of China(41002060 ; National Natural Science Foundation of China(41002060 ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; Foundation of Youth Innovation Promotion Association of Chinese Academy of Sciences ; Foundation of Youth Innovation Promotion Association of Chinese Academy of Sciences ; 41272274) ; 41272274) ; National Natural Science Foundation of China(41002060 ; National Natural Science Foundation of China(41002060 ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; Foundation of Youth Innovation Promotion Association of Chinese Academy of Sciences ; Foundation of Youth Innovation Promotion Association of Chinese Academy of Sciences ; 41272274) ; 41272274) ; National Natural Science Foundation of China(41002060 ; National Natural Science Foundation of China(41002060 ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; Foundation of Youth Innovation Promotion Association of Chinese Academy of Sciences ; Foundation of Youth Innovation Promotion Association of Chinese Academy of Sciences ; 41272274) ; 41272274) ; National Natural Science Foundation of China(41002060 ; National Natural Science Foundation of China(41002060 ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; Foundation of Youth Innovation Promotion Association of Chinese Academy of Sciences ; Foundation of Youth Innovation Promotion Association of Chinese Academy of Sciences ; 41272274) ; 41272274)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85029]
专题	中国科学院地质与地球物理研究所
通讯作者	Fan, QiShun
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Geol & Environm Salt Lake, Xining 810008, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Fan, QiShun,Ma, HaiZhou,Ma, ZhiBang,et al. An assessment and comparison of Th-230 and AMS C-14 ages for lacustrine sediments from Qarhan Salt Lake area in arid western China[J]. ENVIRONMENTAL EARTH SCIENCES,2014,71(3):1227-1237.
APA	Fan, QiShun,Ma, HaiZhou,Ma, ZhiBang,Wei, HaiCheng,&Han, FengQing.(2014).An assessment and comparison of Th-230 and AMS C-14 ages for lacustrine sediments from Qarhan Salt Lake area in arid western China.ENVIRONMENTAL EARTH SCIENCES,71(3),1227-1237.
MLA	Fan, QiShun,et al."An assessment and comparison of Th-230 and AMS C-14 ages for lacustrine sediments from Qarhan Salt Lake area in arid western China".ENVIRONMENTAL EARTH SCIENCES 71.3(2014):1227-1237.