Origin and evolution of intercrystalline brine in the northern Qaidam Basin based on hydrochemistry and stable isotopes
The Kunteyi Basin, located in northern Qaidam, is known as a significant potash ore deposit in China. It is of great significance to study the origin of the potassium-rich intercrystalline brine to support the exploitation of potassium salts. In this study, the major ion concentrations and isotopic...
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Environmental Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvs.2023.1106181/full |
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| author | Qianhui Ren Qianhui Ren Qianhui Ren Binkai Li Yan Zhang Haitao Wu Haitao Wu Haitao Wu |
| author_facet | Qianhui Ren Qianhui Ren Qianhui Ren Binkai Li Yan Zhang Haitao Wu Haitao Wu Haitao Wu |
| author_sort | Qianhui Ren |
| collection | DOAJ |
| description | The Kunteyi Basin, located in northern Qaidam, is known as a significant potash ore deposit in China. It is of great significance to study the origin of the potassium-rich intercrystalline brine to support the exploitation of potassium salts. In this study, the major ion concentrations and isotopic ratios (δ2H, δ18O, and δ11B) of intercrystalline brine were used to analyze the evolution of the brine. The results show that the intercrystalline brine has a much higher concentration of total dissolved solids compared with the oil-field brine. Most of the ions are enriched except Ca2+ and Br−. The value of δ2H and δ18O are much negative while the δ11B values are positive. The analysis of CNa/CCl, CBr/CCl, Cl/(Na + K + Mg) and isotopes ratios, indicate that (1) Atmospheric precipitation is the primary source of water in brine; (2) The salinity of the brine is mainly influenced by halite dissolution; (3) The study area was influenced by the deep hydrothermal fluids. The thermal water recharged the Pleistocene layer, reacted with polyhalite, and formed Mg- and K-rich brine. The solution rose along the channel formed by the Shuangqiquan Fault and was supplied to the shallow intercrystalline brine. |
| first_indexed | 2024-04-10T20:26:49Z |
| format | Article |
| id | doaj.art-cdadd22f15014139a7176bfdff9add94 |
| institution | Directory Open Access Journal |
| issn | 2296-665X |
| language | English |
| last_indexed | 2024-04-10T20:26:49Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Environmental Science |
| spelling | doaj.art-cdadd22f15014139a7176bfdff9add942023-01-25T09:22:54ZengFrontiers Media S.A.Frontiers in Environmental Science2296-665X2023-01-011110.3389/fenvs.2023.11061811106181Origin and evolution of intercrystalline brine in the northern Qaidam Basin based on hydrochemistry and stable isotopesQianhui Ren0Qianhui Ren1Qianhui Ren2Binkai Li3Yan Zhang4Haitao Wu5Haitao Wu6Haitao Wu7School of Water Resources and Electric Power, Qinghai University, Xining, ChinaLaboratory of Ecological Protection and High-Quality Development in the Upper Yellow River, Xining, ChinaKey Laboratory of Water Ecology Remediation and Protection at Headwater Regions of Big Rivers, Ministry of Water Resources, Xining, ChinaQinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, ChinaThe Third Qinghai Nonferrous Metals Geological Exploration Institute, Xining, ChinaSchool of Water Resources and Electric Power, Qinghai University, Xining, ChinaLaboratory of Ecological Protection and High-Quality Development in the Upper Yellow River, Xining, ChinaKey Laboratory of Water Ecology Remediation and Protection at Headwater Regions of Big Rivers, Ministry of Water Resources, Xining, ChinaThe Kunteyi Basin, located in northern Qaidam, is known as a significant potash ore deposit in China. It is of great significance to study the origin of the potassium-rich intercrystalline brine to support the exploitation of potassium salts. In this study, the major ion concentrations and isotopic ratios (δ2H, δ18O, and δ11B) of intercrystalline brine were used to analyze the evolution of the brine. The results show that the intercrystalline brine has a much higher concentration of total dissolved solids compared with the oil-field brine. Most of the ions are enriched except Ca2+ and Br−. The value of δ2H and δ18O are much negative while the δ11B values are positive. The analysis of CNa/CCl, CBr/CCl, Cl/(Na + K + Mg) and isotopes ratios, indicate that (1) Atmospheric precipitation is the primary source of water in brine; (2) The salinity of the brine is mainly influenced by halite dissolution; (3) The study area was influenced by the deep hydrothermal fluids. The thermal water recharged the Pleistocene layer, reacted with polyhalite, and formed Mg- and K-rich brine. The solution rose along the channel formed by the Shuangqiquan Fault and was supplied to the shallow intercrystalline brine.https://www.frontiersin.org/articles/10.3389/fenvs.2023.1106181/fullQaidam BasinKunteyi Playaintercrystalline brineoriginationisotopes |
| spellingShingle | Qianhui Ren Qianhui Ren Qianhui Ren Binkai Li Yan Zhang Haitao Wu Haitao Wu Haitao Wu Origin and evolution of intercrystalline brine in the northern Qaidam Basin based on hydrochemistry and stable isotopes Frontiers in Environmental Science Qaidam Basin Kunteyi Playa intercrystalline brine origination isotopes |
| title | Origin and evolution of intercrystalline brine in the northern Qaidam Basin based on hydrochemistry and stable isotopes |
| title_full | Origin and evolution of intercrystalline brine in the northern Qaidam Basin based on hydrochemistry and stable isotopes |
| title_fullStr | Origin and evolution of intercrystalline brine in the northern Qaidam Basin based on hydrochemistry and stable isotopes |
| title_full_unstemmed | Origin and evolution of intercrystalline brine in the northern Qaidam Basin based on hydrochemistry and stable isotopes |
| title_short | Origin and evolution of intercrystalline brine in the northern Qaidam Basin based on hydrochemistry and stable isotopes |
| title_sort | origin and evolution of intercrystalline brine in the northern qaidam basin based on hydrochemistry and stable isotopes |
| topic | Qaidam Basin Kunteyi Playa intercrystalline brine origination isotopes |
| url | https://www.frontiersin.org/articles/10.3389/fenvs.2023.1106181/full |
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