EH-4技术在豫西菊竹沟金矿区的应用

The application of EH-4 technology to the Juzhugou gold ore district in western Henan Province

介绍了EH-4电磁成像系统数据采集和数据处理方法及其在菊竹沟矿区探测构造深部延伸情况的应用。经钻孔验证后显示：EH-4电磁成像技术能明显区分矿化蚀变构造带和围岩，该区矿化异常形态呈脉状，电阻率约在1500-2500Ω·m。矿床实例研究表明：EH-4连续电导率成像仪测量所得的二维视电阻率一深度剖面图，能清晰地反映地下不同地质体的精细电阻率结构，判读含矿构造带以及矿化异常在空间上的展布，可有效探测深部构造。

This paper describes the data acquisition and data processing method for EH-4 electromagnetic imaging system and its detec- tion of the deep extension of the structure. In the Juzhugou ore district, the drilling verification shows that EH-4 electromagnetic imaging can clearly distinguish the mineralized alteration structural belt and the surrounding rock, The mineralization anomaly is caused by the vein, whose resistivity is about 1500~2500 1~ ~ m. Deposit case study shows that EH-4 continuous conductivity imaging measurement of the apparent resistivity of two-dlmensional-depth profile can clearly reflect different underground geological structures of fine resistivi- ty, and can interpret spatial distribution of mine tectonic belt and mineralization anomalies. Practice has proved that EH-d technology is effective in the detection of deep structure extension.