摘要
本次采用11组稳定同位素地下水样品数据,对其地热流体来源、迁移特征进行了研究,确定了补给来源、补给高程及其水力联系等;采用放射性同位素数据,研究了地热流体年龄。结果表明:本区地热流体主要源于大气降水;地热流体滞留时间较长,具有深部水循环特征;地下水中HCO-3和CO2-3主要来源于土壤或有机质分解,并且有地表冷水混入到向上运移的地下水中,大气溶解的CO2进入水中导致HCO-3的含量增加;研究区地下水中的硫主要来源于沉积层的溶滤作用。研究成果为本区地热水的勘查、开发奠定了基础。
Based on groundwater sample data from 11 sets of stable isotope have carried out study on geothermal fluid source and migration features;then their recharge source,recharge elevation and hydraulic connections etc have been found;through radioisotope data have studied the age of geothermal fluid.The results have shown that geothermal fluid in the area is mainly from atmospheric precipitation.Geothermal fluid has rather long retention time and with deep water circulation specificity.HCO-3 and CO2-3 in groundwater are mainly from soil and organic matter decomposition.Furthermore,there is surface cold water mixed into upward migrating groundwater,atmospheric CO2 come into water caused HCO-3 increasing.Sulfur in study area groundwater is mainly from sedimentary strata leaching.The study has laid the foundation for geothermal water exploration and exploitation in the area.
作者
张纪平
Zhang Jiping(The Second Exploration Team,Hebei Provincial Bureau of Coal Geology,Xingtai,Hebei 054000)
出处
《中国煤炭地质》
2020年第6期48-51,63,共5页
Coal Geology of China
基金
河北省重点研发计划项目“河北省干热岩地热资源赋存分布与开发潜力研究”(2017—2018年度)(17274503D)。
