福建漳州地热水水化学及氢氧同位素特征研究  

Hydrochemistry and Hydrogen-oxygen Isotope Characteristics of Geothermal Water in Zhangzhou,Fujian

作　　者：杨旎 王安东[1,2] 孙占学[1] 陈向阳[3] 豆保娜 武超峰 YANG Ni;WANG Andong;SUN Zhanxue;CHEN Xiangyang;DOU Baona;WU Chaofeng(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Geosciences,East China University of Technology,Nanchang 330013,China;Fujian Minnan Geological Team,Zhangzhou 363000,China;School of Geophysics and Measurement and Control Technology,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,江西南昌330013 [2]东华理工大学地球科学学院,江西南昌330013 [3]福建省闽南地质大队,福建漳州363000 [4]东华理工大学地球物理与测控技术学院,江西南昌330013

出　　处：《东华理工大学学报（自然科学版）》2023年第2期167-178,共12页Journal of East China University of Technology(Natural Science)

基　　金：国家重点研发计划项目(2018YFA0404104);核资源与环境国家重点实验室自主基金项目(Z1912);国家自然科学基金项目(41763005,41962019)。

摘　　要：对漳州地区的地热水进行了野外地质调查及相关分析测试工作,系统研究了地热水的水化学组分、氢氧同位素特征以及大气降水与海水的混合作用,并计算了补给高程。结果显示,研究区地热水水化学类型为Cl-Na·Ca型和HCO_(3)-Ca·Na型。Cl-Na·Ca型地热水封闭性好,处在较停滞状态,矿化度较高;HCO 3-Ca·Na型地热水封闭性差,活动性强,矿化度较低。研究区地热水与围岩之间同位素交换作用不强烈,热储温度不高。地热水的离子组分比、Cl^(-)-δD和Cl^(-)-δ^(18)O均具有良好的线性关系,表明地热水组分受海水与大气降水混合作用的影响。地热水具有较高的补给高程,范围为500~1200 m,大气降水是其来源的主要补给。地热水热储温度为80~140℃,属于中低温水热资源。The hydrochemical component and hydrogen-oxygen isotope characteristics of geothermal water in Zhangzhou area are studied and analyzed.The features of geothermal water hydrochemical components,hydrogen-oxygen isotopes and the mixing effects between atmospheric precipitation and seawater are discussed.The results show that the hydrochemical types of geothermal water are mainly Cl-Na·Ca type and HCO_(3)-Ca·Na type.The Cl-Na·Ca geothermal water has good sealing property,relatively stagnant state with generally high TDS contents.HCO 3-Ca·Na geothermal water is poor,groundwater activity is strong,and its TDS is relatively low.The geothermal water in the study area is mainly derived from the infiltration of atmospheric precipitation.The ion composition ratio,Cl-δD and Cl-δ^(18)O of geothermal water have good linear correlation,suggesting that the geothermal water composition is affected by the mixing effect of seawater and atmospheric precipitation.The geothermal water has a high recharge elevation,ranging from 500 to 1200 m.The geothermal water in the study area has not reached the water-rock equilibrium state.Based on the comprehensive analysis of the calculation results of SiO_(2)geothermal temperature scale and multi-mineral saturation method,it is concluded that the geothermal water reservoir temperature in Zhangzhou area ranges from 80~140℃,which belongs to the medium to low temperature hydrothermal resources.

关 键 词：地热水 水化学 氢氧同位素 水岩作用 漳州地热田 

分 类 号：P592[天文地球—地球化学] P597.2[天文地球—地质学]