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

山西断陷盆地蕴藏着巨大的地热资源,榆次经纬厂-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同位紊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,...

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

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.