GDP-32II、EH4在深部成矿预测中的应用  

Application of GDP-32II and EH4 to Prediction of Mineralization at Depth

作　　者：张作伦[1,2] 曾庆栋[1] 刘建明[1] 于昌明[1] 叶杰[1] 贾长顺[3] 

机构地区：[1]中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京100029 [2]中国科学院研究生院,北京100049 [3]有色金属矿产地质调查中心,北京100012

出　　处：《地质与勘探》2010年第3期470-475,共6页Geology and Exploration

基　　金：国家重点基础研究发展规划项目(编号:2006CB403507)资助

摘　　要：为了探索出一套有效评价矿体深部成矿潜力方法,利用GDP-32II多功能电测系统探测地质体深部充电率特征,装置为单极—偶极装置,方法为时间域直流激发极化法,测量极罐间距40m,无穷远极大于1000m;利用EH4电导率成像系统探测地质体深部电阻率特征,测量电极间距20m或40m。结果表明该方法组合可以有效探测地下340m充电率特征、600m电阻率特征。最后,结合已有地质、地球化学等资料进行综合解译,认为矿化异常体具有高充电率、低电阻率特征、达到评价深部成矿潜力目的。The purpose of this work is to develop a set of effective methods to predict mineralization potential at depth. The GDP-32II multi-function electrical measurement system is used to obtain the charging rate of geological bodies at depth. In this system there is a pole-dipole device,and the induced polarization method in the time domain is used. The survey pot space is 40 m,and the longest supply electrode separation is greater than1000 m. Using the EH4 conductivity imaging system,electronic resistivity of geological bodies is measured,with electrode spacing 20m or 40m. The results show this combined method can measure the charging rate 340m beneath the ground and electronic resistivity at depth 600 m. Through the integrated interpretation and combined with geological and geochemical information,this work suggests that the abnormal mineralized body is featured by high charging rate and low electronic resistivity. And it has achieved the goal to evaluate mineralization at depth.

关 键 词：GDP-32II EH4 深部找矿 

分 类 号：P622.2[天文地球—地质矿产勘探] P631.4[天文地球—地质学]