基岩地下水高电阻率异常地质成因分析  

Geological significance of the high resistivity anomalies in bedrock groundwater exploration

作　　者：蔡力挺 孙珊珊 王忠辉 CAI Liting;SUN Shanshan;WANG Zhonghui(Third Geological and Mineral Exploration Institute of Shandong Province,Yantai 264000,China)

机构地区：[1]山东省第三地质矿产勘查院,烟台264000

出　　处：《物探化探计算技术》2022年第2期179-184,共6页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：地方企业基金勘查项目(DK-DK-2016-1-19)。

摘　　要：这里阐述了电阻率高阻异常的形成机理,以及与对应的高阻地质体的地质成因,探讨了高阻异常与基岩地下水的赋存存在着一定的对应关系,特别是在含水性差的低阻地层中的高阻异常,对寻找基岩地下水中有着重要的指示作用。通过多个电阻率法探测实例,验证了利用电阻率高阻异常也可快速确定最佳井位。In the exploration of bedrock groundwater by resistivity method,the low resistivity intersection or synchronous low resistivity development area reflecting the structural fracture zone is often used as the exploration target area,which has been successful in most bedrock groundwater exploration.However,in practice,it is found that in the relatively low resistivity layer,especially in the low resistivity layer formed by weathered,structural broken clay,silty rock or stratum,the low resistivity is taken as the drilling target,and the well is completed.It often encounters fault gouge rather than groundwater,and most of them fail.On the contrary,in this kind of formation,there is a certain corresponding relationship between high resistivity and high resistivity anomaly and the occurrence of groundwater.Drilling verification shows that by finding high resistivity anomaly in this kind of formation,the best well location can be quickly determined,and the well location determined based on it has a high success rate,but its genesis is less studied.This paper introduces the corresponding relationship between high resistivity anomaly and groundwater occurrence,and analyzes the geological origin of high resistivity anomaly.

关 键 词：基岩地下水 电阻率法 高阻异常 地质成因 

分 类 号：P631.3[天文地球—地质矿产勘探]