Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications
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...
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Language: | English |
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SPRINGER HEIDELBERG
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ftchinacascieeca:oai:ir.ieecas.cn:361006/14362 2023-06-11T04:10:00+02:00 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 Cheng, Hai Liu, Weiguo Mo, Lingtong Li, Xiangzhong Ning, Youfeng Ji, Ming Zong, Baoyun Zhao, Chen 2019-02-01 http://ir.ieecas.cn/handle/361006/14362 https://doi.org/10.1007/s12517-019-4255-x 英语 eng SPRINGER HEIDELBERG ARABIAN JOURNAL OF GEOSCIENCES http://ir.ieecas.cn/handle/361006/14362 doi:10.1007/s12517-019-4255-x U and Th isotopes Lake water chemistry Paleoenvironments Qinghai Lake Basin Northeast Qinghai-Tibet Plateau China SCAVENGING RATES ARCTIC-OCEAN URANIUM TH-230 THORIUM DISEQUILIBRIUM PROFILES INPUTS U-234 Geology Geosciences Multidisciplinary 期刊论文 2019 ftchinacascieeca https://doi.org/10.1007/s12517-019-4255-x 2023-05-08T13:24:38Z 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. Report Arctic Arctic Ocean Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) Arctic Arctic Ocean Arabian Journal of Geosciences 12 3 |
institution |
Open Polar |
collection |
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacascieeca |
language |
English |
topic |
U and Th isotopes Lake water chemistry Paleoenvironments Qinghai Lake Basin Northeast Qinghai-Tibet Plateau China SCAVENGING RATES ARCTIC-OCEAN URANIUM TH-230 THORIUM DISEQUILIBRIUM PROFILES INPUTS U-234 Geology Geosciences Multidisciplinary |
spellingShingle |
U and Th isotopes Lake water chemistry Paleoenvironments Qinghai Lake Basin Northeast Qinghai-Tibet Plateau China SCAVENGING RATES ARCTIC-OCEAN URANIUM TH-230 THORIUM DISEQUILIBRIUM PROFILES INPUTS U-234 Geology Geosciences Multidisciplinary Zhang, Pu Cheng, Hai Liu, Weiguo Mo, Lingtong Li, Xiangzhong Ning, Youfeng Ji, Ming Zong, Baoyun Zhao, Chen Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications |
topic_facet |
U and Th isotopes Lake water chemistry Paleoenvironments Qinghai Lake Basin Northeast Qinghai-Tibet Plateau China SCAVENGING RATES ARCTIC-OCEAN URANIUM TH-230 THORIUM DISEQUILIBRIUM PROFILES INPUTS U-234 Geology Geosciences Multidisciplinary |
description |
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. |
format |
Report |
author |
Zhang, Pu Cheng, Hai Liu, Weiguo Mo, Lingtong Li, Xiangzhong Ning, Youfeng Ji, Ming Zong, Baoyun Zhao, Chen |
author_facet |
Zhang, Pu Cheng, Hai Liu, Weiguo Mo, Lingtong Li, Xiangzhong Ning, Youfeng Ji, Ming Zong, Baoyun Zhao, Chen |
author_sort |
Zhang, Pu |
title |
Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications |
title_short |
Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications |
title_full |
Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications |
title_fullStr |
Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications |
title_full_unstemmed |
Geochemical and isotopic (U, Th) variations in lake waters in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: origin and paleoenvironmental implications |
title_sort |
geochemical and isotopic (u, th) variations in lake waters in the qinghai lake basin, northeast qinghai-tibet plateau, china: origin and paleoenvironmental implications |
publisher |
SPRINGER HEIDELBERG |
publishDate |
2019 |
url |
http://ir.ieecas.cn/handle/361006/14362 https://doi.org/10.1007/s12517-019-4255-x |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_relation |
ARABIAN JOURNAL OF GEOSCIENCES http://ir.ieecas.cn/handle/361006/14362 doi:10.1007/s12517-019-4255-x |
op_doi |
https://doi.org/10.1007/s12517-019-4255-x |
container_title |
Arabian Journal of Geosciences |
container_volume |
12 |
container_issue |
3 |
_version_ |
1768384061810671616 |