Geochemistry of geothermal fluids with implications on the sources of water and heat recharge to the Rekeng high-temperature geothermal system in the Eastern Himalayan Syntax
文献类型:期刊论文
作者 | Tian, Jiao1,2,3; Pang, Zhonghe1,2,3; Guo, Qi1,4; Wang, Yingchun1,2,3; Huang, Tianming1,2,3![]() |
刊名 | GEOTHERMICS
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出版日期 | 2018-07-01 |
卷号 | 74页码:92-105 |
关键词 | Eastern Himalayan syntax Hydrogeochemistry Geothermal gas Heat source Isotope Rekeng geothermal system |
ISSN号 | 0375-6505 |
DOI | 10.1016/j.geothermics.2018.02.006 |
文献子类 | Article |
英文摘要 | Rekeng geothermal system in Eastern Himalayan syntax is found to exhibit the strongest surface manifestations in the western Sichuan plateau, with numerous boiling springs, fumeroles and geysers. What is the heat source of such a high temperature system? Is there a magmatic heat source to support it? In this study we have attempted to seek clues from the isotope geochemistry of geothermal fluids. The stable isotope delta H-2 and delta O-18 composition of geothermal water suggests that it is recharged by precipitation and snow melt of the surrounding mountains. The chemical type of the geothermal water is alkaline HCO3-Na as a result of water-CO2-rock interaction. Geothermal reservoir temperature in the fractured metamorphic rock is estimated to be between 200 degrees C-225 degrees C, using the chemical geothermometers and the chemical thermodynamic modeling approach. During the degassing process upon rising, 0.05 mol/L CO2 has escaped from the geothermal fluid. Evidence from the relationships among major ions and geothermal suite (Li, B, F, As) indicate that the hot springs shared the same parent source fluid and they mixed with cold groundwater to different levels in the subsidiary fractures near surface. Carbon isotope signatures show that the CO2 enriched geothermal gas is 95% of crustal metamorphic origin. Additionally, based on helium isotope analysis, the mantle magmatic He-3 signatures have been largely obliterated since it accounts for no more than 5%, implying there is no underlying mantle-derived magma chamber acting as heat source. Therefore, a significant portion of heat is likely converted from crustal deformation in view of the regional tectonic background as Eastern Himalayan syntax. |
WOS关键词 | NEW-ZEALAND ; HYDROTHERMAL SYSTEM ; GAS GEOCHEMISTRY ; TIBETAN PLATEAU ; CARBON ISOTOPES ; NOBLE-GASES ; CHINA ; EVOLUTION ; HELIUM ; FIELD |
WOS研究方向 | Energy & Fuels ; Geology |
语种 | 英语 |
WOS记录号 | WOS:000431469700008 |
出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
资助机构 | National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) ; National Natural Science Foundation of China(41430319) |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/88306] ![]() |
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, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100029, Peoples R China 4.China Minmet Corp, Beijing 10010, Peoples R China |
推荐引用方式 GB/T 7714 | Tian, Jiao,Pang, Zhonghe,Guo, Qi,et al. Geochemistry of geothermal fluids with implications on the sources of water and heat recharge to the Rekeng high-temperature geothermal system in the Eastern Himalayan Syntax[J]. GEOTHERMICS,2018,74:92-105. |
APA | Tian, Jiao,Pang, Zhonghe,Guo, Qi,Wang, Yingchun,Huang, Tianming,&Kong, Yanlong.(2018).Geochemistry of geothermal fluids with implications on the sources of water and heat recharge to the Rekeng high-temperature geothermal system in the Eastern Himalayan Syntax.GEOTHERMICS,74,92-105. |
MLA | Tian, Jiao,et al."Geochemistry of geothermal fluids with implications on the sources of water and heat recharge to the Rekeng high-temperature geothermal system in the Eastern Himalayan Syntax".GEOTHERMICS 74(2018):92-105. |
入库方式: OAI收割
来源:地质与地球物理研究所
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