Application of Multiple Geophysical Methods to Prospect Concealed Ores Beneath Quaternary Cover: A Case Study from a Copper-Polymetallic Deposit

The magmatic hydrothermal vein-type copper-polymetallic deposits in Weilasituo are strictly controlled by NE-trending fault zones. Whether the concealed orebody exists in the north of Weilasituo ore district is an urgent problem to be solved. The northern of Weilasituo ore district was covered by Quaternary sediments, possessing similar metallogenetic conditions to Weilasituo ore district. In order to investigate the concealed oresbodies, the authors build the multiple geophysical procedures to prospect concealed orebodies in coverage area, including gravity, magnetic induced polarization in median gradient array and controlled source audio-frequency magnetotelluric measurements. Based on the results obtained above, it has been demonstrated that there exists a concealed orebody in the north of Weilasituo ore district. Multiple geophysical procedures constructed in this paper to prospect blind orebodies beneath coverage area, can meet the demand of prospecting ores in covered areas.