Fluid geochemistry and its implications on the role of deep faults in the genesis of high temperature systems in the eastern edge of the Qinghai Tibet Plateau
文献类型：期刊论文
| 作者 | Tian, Jiao1,2,3,4; Pang, Zhonghe1,2,4; Liao, Dawei1,2,4; Zhou, Xiaocheng3 |
| 刊名 | APPLIED GEOCHEMISTRY
 |
| 出版日期 | 2021-08-01 |
| 卷号 | 131页码:13 |
| 关键词 | Qinghai-tibet plateau Longmenshan fault Xianshuihe fault High-temperature geothermal system Geothermal fluid |
| ISSN号 | 0883-2927 |
| DOI | 10.1016/j.apgeochem.2021.105036 |
| 英文摘要 | Deep faults could provide fluent channels for geothermal water uplift so that it is one of the targets for hightemperature hydrothermal exploration in orogenic geothermal belt. In the eastern edge of the Qinghai Tibet Plateau, significant geothermal potential reflected by hot springs, fumaroles, and sinters, are indeed exposed along a series of lithospheric-scale faults, including the Jinshajiang, the Ganzi-Litang and the Xianshuihe faults. However, as the controlling fault of the eastern edge of the plateau, the Longmenshan Fault has few geothermal manifestations. In order to uncover the role of deep faults in the genesis of high-temperature geothermal systems, a comprehensive chemical and isotopic comparison of geothermal fluid between the Xianshuihe-Anninghe Fault and the Longmenshan-Minjiang Fault was investigated in this paper. According to FixAl modeling and cation geothermometric calculations, the reservoir temperatures of geothermal systems along the Longmenshan Fault are lower than 150 degrees C with circulation depth of geothermal water less than 4 km while those in the Xianshuihe Fault reaches up to 260 degrees C with geothermal water circulating as deep as 8 km. Compared to the Xianshuihe Fault, the low reservoir temperatures along the Longmenshan Fault are accompanied by two characteristics of geothermal fluid: (1) no distinctive oxygen shift occurs in stable isotopes of geothermal waters; and (2) little mantle-derived volatiles found in the gaseous components. We propose that, extensional fracture systems are locally formed in the strike-slip movement of the Xianshuihe and Anninghe faults, which not only act as conduits for deep-derived geothermal volatiles, such as metamorphic carbon dioxide and mantle helium, but also enhance the heat convection processes, resulting in the formation of high-temperature geothermal systems. In contrast, in the Longmenshan Thrust Fault, the shallow circulation of geothermal water in closed fracture systems accounts for its lower reservoir temperatures. Therefore, deep extensional fault is a crucial element in forming a hightemperature geothermal system in the eastern edge of the Qinghai Tibet Plateau. |
| WOS关键词 | CRUSTAL STRUCTURE ; GEOTHERMAL WATERS ; DEFORMATION ; EQUILIBRIA ; EVOLUTION ; AREAS |
| 资助项目 | National Natural Science Founda-tion of China[41902252] ; National Natural Science Founda-tion of China[41430319] ; National Key Research and Development Project[2017YFC1500501] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000685084400006 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/101877]  |
| 专题 | 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
| 通讯作者 | Pang, Zhonghe |
| 作者单位 | 1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.China Earthquake Adm, Inst Earthquake Forecasting, Beijing 100036, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tian, Jiao,Pang, Zhonghe,Liao, Dawei,et al. Fluid geochemistry and its implications on the role of deep faults in the genesis of high temperature systems in the eastern edge of the Qinghai Tibet Plateau[J]. APPLIED GEOCHEMISTRY,2021,131:13. |
| APA | Tian, Jiao,Pang, Zhonghe,Liao, Dawei,&Zhou, Xiaocheng.(2021).Fluid geochemistry and its implications on the role of deep faults in the genesis of high temperature systems in the eastern edge of the Qinghai Tibet Plateau.APPLIED GEOCHEMISTRY,131,13. |
| MLA | Tian, Jiao,et al."Fluid geochemistry and its implications on the role of deep faults in the genesis of high temperature systems in the eastern edge of the Qinghai Tibet Plateau".APPLIED GEOCHEMISTRY 131(2021):13. |
入库方式： OAI收割
来源：地质与地球物理研究所
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