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  4. 中国科学院页岩气与地质工程重点实验室
Magmatic origin of geothermal fluids constrained by geochemical evidence: Implications for the heat source in the northeastern Tibetan Plateau

文献类型：期刊论文

作者Pan, Sheng1,2,5; Kong, Yanlong1,2,5; Wang, Ke1,2,5; Ren, Yaqian1,2,5; Pang, Zhonghe1,2,5; Zhang, Chao4; Wen, Dongguang3; Zhang, Linyou3; Feng, Qingda3; Zhu, Guilin3
刊名JOURNAL OF HYDROLOGY
出版日期2021-12-01
卷号603页码:17
关键词Northeastern Tibetan Plateau Geothermal energy Gonghe basin Parent geothermal fluids Hydro-geochemistry Partial melt zone
ISSN号0022-1694
DOI10.1016/j.jhydrol.2021.126985
英文摘要The northeastern Tibetan Plateau (NETP) represents the growth front of the Tibetan Plateau (TP) system. This region has long been recognized as a key in understanding the topographic response and crustal thickening of the entire TP. A heat flow anomaly (Gonghe Basin, 102 mW/m(2)) was found in the NETP. However, the heat-generation mechanism and the heat source of the Gonghe Basin are still debated as it is unclear whether they are related to magmatic melting activities. Herein, we provide systematic hydrogeochemical data of two types of geothermal waters (type I and II: geothermal waters sampled from within the basin and the mountainous regions, respectively) found in the region. Type I high 8D (-85.0 parts per thousand to -59.0 parts per thousand), delta O-18 (-11.1 parts per thousand to -8.0 parts per thousand), Cl- (mostly range from 300 to 900 mg/L), and trace element, whereas type II has low delta D (-97.1 parts per thousand to -89 parts per thousand), delta O-18 (-13.0 parts per thousand to -11.8 parts per thousand), Cl- (30 to 180 mg/L) and trace elements. Furthermore, we identified the existence of a high-temperature parent geothermal fluid based on the chloride - enthalpy model, it was estimated to possess a temperature of 310 degrees C and a circulation depth of 6.8-7.8 km. The parent geothermal fluid originated from snowmelt water, which later mixed with a magmatic fluid. The helium (He) ratios of geothermal gas ranged from 0.01 Ra to 0.18 Ra and indicated that the source of He was primarily from a crustal source. In addition to the heat flow analysis and magnetotelluric (MT) data, we suggested that the magmatic nature of the geothermal fluid is caused by a partial melt zone, which is ubiquitous in the middle to lower crust and serves as the heat source in the NETP. Finally, a conceptual model was built to illustrate the occurrence of magmatic fluid and its genesis. The findings will help to improve the understanding of the uplift of the TP and reveals the important role of deep groundwater circulation in the formation of high-temperature geothermal resources.
WOS关键词HYDROTHERMAL SYSTEMS ; GONGHE BASIN ; SOUTHERN TIBET ; ISOTOPIC COMPOSITIONS ; WATERS ; TEMPERATURE ; CHINA ; DEFORMATION ; TECTONICS ; EVOLUTION
资助项目National Key Research and Development Program of China[2018YFB1501801] ; Youth Innovation Promotion Association of CAS[2020067]
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
WOS记录号WOS:000706318300060
出版者ELSEVIER
资助机构National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/102994]  
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Kong, Yanlong
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
3.China Geol Survey, Ctr Hydrogeol & Environm Geol Survey, Baoding 071051, Peoples R China
4.Chengdu Univ Technol, Coll Energy, Chengdu 610059, Sichuan, Peoples R China
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Pan, Sheng,Kong, Yanlong,Wang, Ke,et al. Magmatic origin of geothermal fluids constrained by geochemical evidence: Implications for the heat source in the northeastern Tibetan Plateau[J]. JOURNAL OF HYDROLOGY,2021,603:17.
APA Pan, Sheng.,Kong, Yanlong.,Wang, Ke.,Ren, Yaqian.,Pang, Zhonghe.,...&Wang, Jiyang.(2021).Magmatic origin of geothermal fluids constrained by geochemical evidence: Implications for the heat source in the northeastern Tibetan Plateau.JOURNAL OF HYDROLOGY,603,17.
MLA Pan, Sheng,et al."Magmatic origin of geothermal fluids constrained by geochemical evidence: Implications for the heat source in the northeastern Tibetan Plateau".JOURNAL OF HYDROLOGY 603(2021):17.

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来源：地质与地球物理研究所

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