激发极化法在甘肃瓜州县辉铜山铜矿外围隐伏铜矿勘查中的应用

Application of Induced Polarization Method to Mineral Exploration in Huitongshan Concealed Copper Deposits of Gansu

通过分析辉铜山铜矿体特征及矿山开采时深部找矿成果,发现矿体具SE向倾伏趋势,地表被大面积第四系覆盖。对测区岩(矿)石进行物性测量,发现区内矿石具高极化中低阻电性特征,与围岩电性差异明显,可用激发极化法进行深部地球信息探测。在1∶1万矿区地质填图基础上,采用激电中梯和激电测深2种方法进行矿产勘查,圈定2处明显的激电异常。结合区内地质特征和钻孔资料,发现高极化中低阻激电异常与推测的隐伏铜矿体具良好的空间对应关系,显示该矿区具良好的深部找矿潜力,为进一步详查工作提供了依据。

By analyzing the ore body characteristics of Huitongshan Copper Mine and the deep prospecting results, it is found that the orebody tends to dip southward and eastward, and the surface is covered by a large area of Quaternary. The physical properties of the rock (ore) in the survey area are measured,It is found that the ore in the area has the electrical characteristics of "high polarization, medium resistance", which are obviously different from the electrical properties of the surrounding rock. Therefore, the induced polarization method is used to deep ground. Spherical information detection. On the basis of geological mapping of 1:10,000 mining area, two methods of intermediate gradient induced polarization measure,electrical sounding of induced polarization are used to carry out metal mineral exploration, and two obvious IP anomalies are delineated. Combining with geological characteristics and borehole data in the area, it is found that the IP anomalies with high polarization, medium resistance and low resistance have a good spatial correspondence with the conjectured concealed copper orebody, which shows that the mining area has a good deep prospecting potential for further exploration. The detailed investigation work provides the basis.