环境同位素技术在研究皖江经济带地热资源形成过程中的应用  

Application of environmental isotope technology in studying the formation of geothermal resources in the Wanjiang economic belt

作　　者：魏永霞[1] 程宏超[1] 汤皓 WEI Yong-xia;CHENG Hong-chao;TANG Hao(Geo-environment Monitoring Station of Anhui Province,Hefei,Anhui 230001,China)

机构地区：[1]安徽省地质环境监测总站,安徽合肥230001

出　　处：《安徽地质》2022年第2期141-144,149,共5页Geology of Anhui

基　　金：安徽省公益性地质工作项目“皖江经济带地热资源调查评价”(编号:2015-g-12)资助。

摘　　要：根据皖江经济带地热点的分布特征,分析沉积盆地型与隆起山地型地热资源分布规律及特征。同时,根据不同热储岩性的水化学类型,分析了地热流体的补径排条件及所处的径流区位置。通过对研究区内地热流体、温度异常泉水、地表水以及雨水等水样品中的δD、δ^(18)O、^(14)C等同位素含量分析,估算各地地热流体补给区的温度、高程、位置以及地热流体年龄。研究同位素在地下地质环境中的变化特征,总结地热流体主要储存的环境类型(开放型、半开放型以及封闭型)。The distribution rules and characteristics of geothermal resources of sedimentary basin type and uplift mountain type are analyzed according to the distribution characteristics of geothermal spots in the Wanjiang economic belt.At the same time,according to the hydrochemical types of the lithology of different geothermal reservoirs,the geothermal fluids have been studied for their conditions of recharge,runoff and discharge as well as the locations of their runoff areas.Based on the analysis ofδD,δ^(18)O and^(14)C isotope contents in samples from geothermal fluid,abnormal-temperature spring water,surface water and rain water in the study area,the recharge areas of geothermal fluids are estimated in terms of their temperatures,elevations,locations and ages.The isotopes have been studied for their variation characteristics in underground geological environments,and the geothermal fluids have been summarized for their main types of storage environment(open,semi-open and closed).

关 键 词：地热流体 同位素 补给源 地热流体年龄 地质环境 

分 类 号：P641[天文地球—地质矿产勘探]