Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications
文献类型：期刊论文
| 作者 | Zhang, Pu2,3,4; Cheng, Hai1,5; Liu, Weiguo4; Mo, Lingtong3; Li, Xiangzhong4; Ning, Youfeng1; Ji, Ming6; Zong, Baoyun1; Zhao, Chen3 |
| 刊名 | ARABIAN JOURNAL OF GEOSCIENCES
 |
| 出版日期 | 2019-02-01 |
| 卷号 | 12期号:3页码:12 |
| 关键词 | U and Th isotopes Lake water chemistry Paleoenvironments Qinghai Lake Basin Northeast Qinghai-Tibet Plateau China |
| ISSN号 | 1866-7511 |
| DOI | 10.1007/s12517-019-4255-x |
| 通讯作者 | Zhang, Pu(zhangpu@nwu.edu.cn) ; Cheng, Hai(cheng021@xjtu.edu.cn) ; Liu, Weiguo(liuwg@loess.llqg.ac.cn) |
| 英文摘要 | 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. |
| WOS关键词 | SCAVENGING RATES ; ARCTIC-OCEAN ; URANIUM ; TH-230 ; THORIUM ; DISEQUILIBRIUM ; PROFILES ; INPUTS ; U-234 |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000457365800005 |
| 出版者 | SPRINGER HEIDELBERG |
| 资助机构 | 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 |
| 源URL | [http://ir.ieecas.cn/handle/361006/14363]  |
| 专题 | 地球环境研究所_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, Inst Global Environm Change, Xian 710061, Shaanxi, Peoples R China 2.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China 3.Northwest Univ, Coll Urban & Environm Sci, Xian 710127, Shaanxi, Peoples R China 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, 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. |
入库方式： OAI收割
来源：地球环境研究所
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