Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications

doi:10.1007/s12517-019-4255-x

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	Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications
	Zhang, Pu 1,2,3; Cheng, Hai 4,5; Liu, Weiguo 2; Mo, Lingtong 3; Li, Xiangzhong 2; Ning, Youfeng 4; Ji, Ming 6; Zong, Baoyun 4; Zhao, Chen 3
通讯作者	Zhang, Pu(zhangpu@nwu.edu.cn) ; Cheng, Hai(cheng021@xjtu.edu.cn) ; Liu, Weiguo(liuwg@loess.llqg.ac.cn)
	2019-02-01
发表期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
卷号	12 期号:3 页码:12
摘要	A uranium (U) geochemical study of lake water samples from Qinghai Lake, Northeast Qinghai-Tibet Plateau, China, was undertaken to assess the primary controls on lake water chemistry. The U-234/U-238 activity ratios of lake water exhibited limited spatial and vertical variations and were relatively high compared to the values measured in rivers worldwide ((U-234/U-238)=1.171), lower than in the four river discharge inside the Lake Qinghai catchment. The U concentrations also varied minimally within three vertical sampling profiles and exhibited spatial patterns in surface waters that correlated with the distribution of total dissolved solid (TDS) values and salinity concentrations. These data suggest that the variability in U, TDS, and salinity are partially controlled by evaporation or a different secondary concentration pathway. Moreover, the U concentration and U-234/U-238 activity ratio indicates that the length of this procedure, which is controlled by the duration of water-rock interaction, is probably an important factor to consider when accounting for the variable salinities of lakes located in similar geographical areas. The Th-230(XS) content is primarily derived from the decay of dissolved U-234. The various (230)Thxs concentrations observed in the water column are interpreted to reflect various scavenging residence times in Qinghai Lake, ranging from 0.7 to 4years. The lower water mass age, such as at site 123, suggests a more rapid scavenging rate. Dissolved Th-232 is placed into the lake via the incomplete dissolution of lithogenic substances, such as dust aerosol, or other lithogenic sources (e.g., lake bed sediment or suspended riverine sediment). Water column Th-232 concentration data suggest that the Th concentrations of the lake water are controlled by three processes: (1) the dissolution of aerosol dust, (2) the dissolution of riverine and lake bed sediment, and (3) the scavenging of Th from the water.
关键词	U and Th isotopes Lake water chemistry Paleoenvironments Qinghai Lake Basin Northeast Qinghai-Tibet Plateau China
DOI	10.1007/s12517-019-4255-x
关键词[WOS]	SCAVENGING RATES ; ARCTIC-OCEAN ; URANIUM ; TH-230 ; THORIUM ; DISEQUILIBRIUM ; PROFILES ; INPUTS ; U-234
收录类别	SCI ; SCI
语种	英语
资助项目	Projects of International Cooperation and Exchanges NSFC[41561144003] ; National Natural Science Foundation of China[41572156] ; National Natural Science Foundation of China[41873013] ; Major Program of National Natural Science Foundation of China[41731174] ; Program for Key Science and Technology Innovation Team in Shaanxi Province[2014KCT-27]
WOS研究方向	Geology
项目资助者	Projects of International Cooperation and Exchanges NSFC ; National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Program for Key Science and Technology Innovation Team in Shaanxi Province
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000457365800005
出版者	SPRINGER HEIDELBERG
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/14364
专题	加速器质谱中心
通讯作者	Zhang, Pu; Cheng, Hai; Liu, Weiguo
作者单位	1.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 3.Northwest Univ, Coll Urban & Environm Sci, Xian 710127, Shaanxi, Peoples R China 4.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710061, Shaanxi, Peoples R China 5.Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA 6.Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Pu,Cheng, Hai,Liu, Weiguo,et al. Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications[J]. ARABIAN JOURNAL OF GEOSCIENCES,2019,12(3):12.
APA	Zhang, Pu.,Cheng, Hai.,Liu, Weiguo.,Mo, Lingtong.,Li, Xiangzhong.,...&Zhao, Chen.(2019).Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications.ARABIAN JOURNAL OF GEOSCIENCES,12(3),12.
MLA	Zhang, Pu,et al."Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications".ARABIAN JOURNAL OF GEOSCIENCES 12.3(2019):12.