Anatomy of the convective geothermal system from geophysical and hydrochemical data: A case study from the Changshou geothermal field, South China
文献类型：期刊论文
| 作者 | Cheng, Yuanzhi2; Wang, Cheng1; Da, Wenwei4; Kong, Yanlong2; Hu, Xiangyun3 |
| 刊名 | GEOPHYSICS
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 88期号:5页码:WB1-WB10 |
| ISSN号 | 0016-8033 |
| DOI | 10.1190/GEO2022-0409.1 |
| 英文摘要 | There are abundant low-medium temperature geothermal resources in southern China; however, a lack of research into their properties restricts the utilization of the geothermal energy. To expand the geothermal energy potential in southern China, it is vital to clarify the nonvolcanic geothermal system mechanisms. This study aimed to elucidate the mechanisms for the Changshou geothermal field, as a representative structurally controlled convective geothermal system, by analyzing the geophysical and hydrochemical data. The surface-to-subsurface (400 m depth) electrical resistivity structure of the geothermal field was obtained by 2D inversion of two intersecting controlled-source audio-frequency magnetotellurics and electrical resistivity tomography geophysical profiles. We identified the cap rock, reservoir, and fluid pathways of the geothermal system and verified them via drilling results. The cap was composed of Quaternary sediments and Cretaceous sandstone with moderate resistivity (10-50 Om), and the geothermal reservoir and fluid pathways were composed of dolomites and fracture zones with low resistivity (less than 5 Om), respectively. The hydrochemical results showed that the geothermal water was of the type HCO3 center dot SO4-Ca center dot Mg, with low values of total dissolved solids resulting from shallow groundwater mixing. Isotope analyses indicated that the geothermal water was derived from precipitation in the Dahong Mountains, southeast of the geothermal field. The average temperature of the geothermal reservoir, as estimated by chalcedony and K-Mg geothermometers, was 53 degrees C. Based on the geothermal gradient calculation, the circulation depth of the groundwater was 1500 m, with the circulation process driven by heat flows originating deep within the earth. The Changshou geothermal field was identified as a potential source of energy for residential heating in winter, owing to the large flow (2700 m3/d) and high permeability (24.03 m/d) of the geothermal reservoir. |
| WOS关键词 | ELECTRICAL-CONDUCTIVITY ; HUBEI PROVINCE ; INVERSION ; FLUID ; SMOOTH ; GEOCHEMISTRY ; EXPLORATION ; MODELS ; FLOW |
| 资助项目 | National Key Research and Development Project of China[2019YFC0604901] ; National Natural Science Foundation of China[42004060] ; Chinese Academy of Sciences[2020-DX03-B-007] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | SOC EXPLORATION GEOPHYSICISTS - SEG |
| WOS记录号 | WOS:001069667300032 |
| 资助机构 | National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110853]  |
| 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 | Cheng, Yuanzhi; Hu, Xiangyun |
| 作者单位 | 1.Xian Res Inst Co Ltd, China Coal Technol & Engn Grp Corp, Xian, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing, Peoples R China 3.China Univ Geosci, Inst Geophys & Geomat, Key Lab Subsurface Multiscale Imaging, Wuhan, Peoples R China 4.Hubei Geol Bur, Wuhan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, Yuanzhi,Wang, Cheng,Da, Wenwei,et al. Anatomy of the convective geothermal system from geophysical and hydrochemical data: A case study from the Changshou geothermal field, South China[J]. GEOPHYSICS,2023,88(5):WB1-WB10. |
| APA | Cheng, Yuanzhi,Wang, Cheng,Da, Wenwei,Kong, Yanlong,&Hu, Xiangyun.(2023).Anatomy of the convective geothermal system from geophysical and hydrochemical data: A case study from the Changshou geothermal field, South China.GEOPHYSICS,88(5),WB1-WB10. |
| MLA | Cheng, Yuanzhi,et al."Anatomy of the convective geothermal system from geophysical and hydrochemical data: A case study from the Changshou geothermal field, South China".GEOPHYSICS 88.5(2023):WB1-WB10. |
入库方式： OAI收割
来源：地质与地球物理研究所
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