内蒙古老国营子金铜矿床地质-地球物理勘查与研究

Geological and Geophysical Exploration and Research in the Laoguoyingzi Au-Cu Deposit,Inner Mongolian,China

内蒙古老国营子金铜矿床是近年来利用地质与地球物理相互结合手段新发现的一个矿床。本次研究利用基于电磁原理的地球物理手段进行了找矿测试,结果表明:甚低频(VLF)地球物理扫面发现了近EW向和NW向的高阻带,分别对应了两条相应的矿化蚀变带。音频大地电磁法(EH4)测深影像显示矿化蚀变带表现为高阻异常带,与VLF的测量结果相一致。激电(IP)中梯测量显示矿化蚀变带具有高阻、高充电率和高金属因子异常特征。结合具体的地质特征,在老国营子金铜矿区综合运用这三种地球物理方法,取得了较好的找矿效果。

Laoguoyingzi Au-Cu deposit in Inner Mongolia is newly discovered in recent years by the use of geophysical methods. The use of geophysical methods on the basis of the principle of electromagnetic （very low frequency measurement （VLF） , audio ground electromagnetic method （EH4） , IP measurement （IP） ） for testing. The results show that the VLF survey found nearly EW and NW to high resistance band, in both directions corresponding to the two corresponding mineralized alteration zone. EH4 imaging shows that the high mineralized alteration zone is characterized by high resistance zones, consistent with the measurement results of VLF. The IP measurement shows that mineralization alteration belt with high charge rate, high resistance and the characteristics of the metallic factor anomalies. The combined use of three kinds of geophysical methods in the Laoguoyingzi Au-Cu mining area, together with the specific geological features, for under the cover of concealed ore body has obtained very good effect.