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Hydrogeochemistry and geothermometry of the carbonate-evaporite aquifers controlled by deep-seated faults using major ions and environmental isotopes

文献类型：期刊论文

作者Yang, Pingheng3,4,5; Luo, Dan3; Hong, Aihua5; Ham, Brian6; Xie, Shiyou3; Ming, Xiaoxing3; Wang, Zhixiang1; Pang, Zhonghe2,4
刊名JOURNAL OF HYDROLOGY
出版日期2019-12-01
卷号579页码:16
关键词Thermal water Carbonate rocks Isotopes Fault Paleo-recharge Southeast Chongqing in China
ISSN号0022-1694
DOI10.1016/j.jhydrol.2019.124116
英文摘要Carbonate aquifers probably constitute the most important thermal water resources in non-volcanic areas, and are characteristic of great energy potential and easier production as the most ideal targets for development in the future. The thermal waters in the aquifers within Southeast Chongqing (SEC) of China occur in an extensive region with an area of 198,000 km(2), which are mainly hosted in the Cambrian and Ordovician carbonate-evaporite rocks. The thermal waters are mainly in pristine conditions and their genesis has not yet been fully understood. The occurrence of thermal waters in SEC is closely related to the presence of deep-seated faults which constitute pathways for the hydrothermal circulation. In this study, an investigation of water major ions and environmental isotopes from 14 hot springs and three drilled wells was carried out to examine their hydrogeochemical evolution and to estimate reservoir temperature. The thermal waters have outflow temperatures from 19 to 54.2 degrees C. They are divided into two hydrochemical groups with the Yushan Fault as a boundary: Group A, located to the west of the fault, are characterized by facies of chloride sodium waters with higher TDS; Group B, to the east of the fault, are more complicated sulfate-bicarbonate-chloride alkaline-earth waters with lower TDS. The hydrochemical processes such as dissolution of carbonate, gypsum and/or anhydrite, and halite, the common ion effect, and dedolomitization are evident based on the major ions and delta S-34(so4) and delta O-18(so4). The delta O-18 and delta D compositions of the thermal waters suggest a meteoric recharge in a relatively wetter and colder climatic condition. The silica geothermometers show that the average reservoir temperatures are 63 +/- 18 degrees C for Group A, and 82 +/- 15 degrees C for Group B. The corresponding average reservoir depths are estimated to be 2.5 +/- 0.7 km for Group A, and 3.2 +/- 0.7 km for Group B. The corrected C-14 ages of the thermal waters average at 14.8 ka BP, corresponding to the late Pleistocene. A conceptual circulation model is proposed for the thermal waters. Driven by gravity of topographic gradients, the percolating groundwater circulates at a specific depth, reaching a higher temperature and interacting with the host carbonate with imbedded evaporitic minerals (gypsum and/or anhydrite, and additional halite for Group A) to be saline deep-seated thermal fluids. The fluids rise along faults and emerge at the surface as thermal springs. The slow renewability rate of the thermal aquifers highlights the importance of assessing the resource before groundwater exploitation and extraction.
WOS关键词WATER-ROCK INTERACTION ; THERMAL WATERS ; RESIDENCE TIME ; GROUNDWATER-FLOW ; RECHARGE AREAS ; SULFATE ; SYSTEM ; EVOLUTION ; ORIGIN ; GEOCHEMISTRY
资助项目Fundamental Research Funds for the Central Universities[XDJK2018AB002] ; Chongqing Research Program of Basic Research and Frontier Technology[cstc2019jcyj-msxmX0062] ; Chongqing Research Program of Basic Research and Frontier Technology[cstc2016jcyjA0921] ; China Scholarship Council
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
WOS记录号WOS:000500371200008
出版者ELSEVIER
资助机构Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; Chongqing Research Program of Basic Research and Frontier Technology ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council
源URL[http://ir.iggcas.ac.cn/handle/132A11/95788]  
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Yang, Pingheng; Pang, Zhonghe
作者单位1.Chongqing Geol Bur Geol & Minerals Explorat, Hydrogeol Team 208, Chongqing 400700, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Southwest Univ, State Cultivat Base Ecoagr Southwest Mt Land, Field Sci Observat & Res Base Karst Ecoenvironm N, Minist Nat Resources,Sch Geog Sci, Chongqing 400715, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
5.Chongqing Geol Bur Geol & Minerals Explorat, Nanjiang Hydrogeol Team, Lab Chongqing Groundwater Resource Utilizat & Env, Chongqing 401121, Peoples R China
6.Tennessee Dept Environm & Conservat, Div Water Resources, Nashville, TN 37243 USA
推荐引用方式
GB/T 7714		 Yang, Pingheng,Luo, Dan,Hong, Aihua,et al. Hydrogeochemistry and geothermometry of the carbonate-evaporite aquifers controlled by deep-seated faults using major ions and environmental isotopes[J]. JOURNAL OF HYDROLOGY,2019,579:16.
APA Yang, Pingheng.,Luo, Dan.,Hong, Aihua.,Ham, Brian.,Xie, Shiyou.,...&Pang, Zhonghe.(2019).Hydrogeochemistry and geothermometry of the carbonate-evaporite aquifers controlled by deep-seated faults using major ions and environmental isotopes.JOURNAL OF HYDROLOGY,579,16.
MLA Yang, Pingheng,et al."Hydrogeochemistry and geothermometry of the carbonate-evaporite aquifers controlled by deep-seated faults using major ions and environmental isotopes".JOURNAL OF HYDROLOGY 579(2019):16.

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来源：地质与地球物理研究所

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