The transport and enrichment of rhodium (III) in chloride-rich fluids: Implications for seafloor hydrothermal systems
文献类型：期刊论文
| 作者 | Yan, Haibo2,3; Xu, Jing3; Sun, Weidong1; Ding, Xing2,4 |
| 刊名 | GEOSCIENCE FRONTIERS
 |
| 出版日期 | 2026-05-01 |
| 卷号 | 17期号:3页码:13 |
| 关键词 | Hydrothermal experiments Rhodium species Thermodynamic stability Seafloor hydrothermal systems Geochemical modeling |
| ISSN号 | 1674-9871 |
| DOI | 10.1016/j.gsf.2026.102257 |
| 通讯作者 | Ding, Xing(xding@gig.ac.cn) |
| 英文摘要 | Hydration and complexation are crucial processes for dissolving metal elements and transporting metal complexes in hydrothermal fluids. However, the impact of hydration and complexation on the transport and enrichment of metal elements, such as those involving rhodium and chloride, has not been thoroughly evaluated. Here, this study employed a hydrolysis experiment of K3RhCl6 at 200-600 degrees C and 100 MPa to determine the controlling factors and thermodynamics of Rh-Cl complexes in chloride-rich fluids. The results show that the dominant Rh-Cl complex is RhCl3-6at 200-400 degrees C, gradually converting into Rh(III)-OH-Cl complexes over 400 degrees C. The hydrolysis equilibrium constant (LnK) of RhCl3-6 at 200-400 degrees C affected by temperature (T (K)) is calculated as: lnK 49 06 7 01 48802 3896 0 T Accordingly, the DrHmH and DrSHm of the hydrolysis reaction were obtained to be 405.8 +/- 32.39 kJ mol-1 and 407.9 +/- 58.30 J mol-1 K-1, respectively. Thermodynamic parameters reveal the dependence of the stability of Rh-Cl complexes on temperature in chloride-rich fluids. For instance, the formation constants (lnb) of RhCl3-6 vary from 0.0184 +/- 0.0022 to-0.0079 +/- 0.0012 as the temperature rises from 150 to 400 degrees C. Geochemical modeling illustrates that low-temperature and acidic fluids can enhance the stability of Rh-Cl complexes, which can be dominated by Cl concentration (over 0.5 wt.%). Hydrothermal fluids with low pH and high Cl content, typically occurring in the mid-ocean ridge, promote Rh transport and subsequent enrichment in encrustations and minerals by substituting Mn and Fe for isomorphism, or in the form of alloys, forming a substantial Rh reservoir in the ocean. (c) 2026 China University of Geosciences (Beijing) and Peking University. Published by Elsevier B.V. on behalf of China University of Geosciences (Beijing). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
| WOS关键词 | PLATINUM-GROUP ELEMENTS ; PARTIAL MOLAL PROPERTIES ; FERROMANGANESE CRUSTS ; THERMODYNAMIC PROPERTIES ; ACTIVITY-COEFFICIENTS ; AQUEOUS-SOLUTIONS ; HIGH-PRESSURES ; THEORETICAL PREDICTION ; SULFIDE MINERALS ; PGE DISTRIBUTION |
| 资助项目 | National Natural Science Foundation of China[42303031] ; National Natural Science Foundation of China[42230807] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; Fuzhou University Research Start-up Fund[XRC-25003] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001681612600001 |
| 出版者 | CHINA UNIV GEOSCIENCES, BEIJING |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/204712]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 通讯作者 | Ding, Xing |
| 作者单位 | 1.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Deep Earth Proc & Resources, Guangzhou 510640, Peoples R China 3.Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China 4.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Haibo,Xu, Jing,Sun, Weidong,et al. The transport and enrichment of rhodium (III) in chloride-rich fluids: Implications for seafloor hydrothermal systems[J]. GEOSCIENCE FRONTIERS,2026,17(3):13. |
| APA | Yan, Haibo,Xu, Jing,Sun, Weidong,&Ding, Xing.(2026).The transport and enrichment of rhodium (III) in chloride-rich fluids: Implications for seafloor hydrothermal systems.GEOSCIENCE FRONTIERS,17(3),13. |
| MLA | Yan, Haibo,et al."The transport and enrichment of rhodium (III) in chloride-rich fluids: Implications for seafloor hydrothermal systems".GEOSCIENCE FRONTIERS 17.3(2026):13. |
入库方式： OAI收割
来源：海洋研究所
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