山西断陷盆地榆次经纬厂一带地热水勘查及同位素地球化学特征  

Exploration of Geothermal Water and Isotope Geochemistry Characteristics in Jingwei Plant Area of Shanxi Basin

作　　者：张新军[1] 刘鸿福[1] 张和生[1] 吕义清[1] 贺鹰[1] 

机构地区：[1]太原理工大学矿业工程学院,太原030024

出　　处：《工程地球物理学报》2011年第1期105-109,共5页Chinese Journal of Engineering Geophysics

基　　金：成都理工大学地球探测与信息技术教育部重点实验室项目(编号:2008DKF013)资助

摘　　要：山西断陷盆地蕴藏着巨大的地热资源,榆次经纬厂一带位于该盆地中部,地热水资源非常丰富。应用CSAMT法进行探测显示新生代厚度约2500～2700m,钻探取样水化学分析矿化度极高,含盐度接近于海水。D、O同位素分析表明比值接近雨水线,氚值很低,说明地热水补给源较远,交替更新的循环周期长,水流速迟缓,在含水层内储存时间较长,地热水年龄较老,几乎没有近代水混入。综合分析认为榆次经纬厂一带地热水由于大断裂构造的存在,使得该地热井水处于相对封闭半封闭的较特殊的古沉积地球化学环境,与周边岩溶地下水系统联系较弱,为滞流型无氚老水的水文地质特点。Great geothermal resources are buried in the Shanxi rift basin.Yuci-Jingwei factory is located in the middle of this basin and geothermal water resources are very abundant.The CSAMT results showed that the thickness is about 2500～2700m and drilling results of water samples show that the salinity is high,the salt content is close to seawater according to the chemical analysis.D and O isotope analysis showed that the ratio is close to the water line,the value of tritium is very low.Isotopic results indicate that the geothermal water supplied source is far away,alternating update cycle is long,the water flowing speed is slow,and the aquifer is stored for a long time.From the comprehensive analysis,we think because of the existence of the large fault structures in the areas of Jingwei plant,the geothermal wells are in a relatively closed or semi-closed sedimentary geochemistry environment,where they have very weak connection with the surrounding karst groundwater system.

关 键 词：山西断陷盆地 地热 同位素 

分 类 号：P632.7[天文地球—地质矿产勘探]