关键词: 大功率激电, 电阻率, 极化率, 多金属硫化物

Abstract: In order to achieve a breakthrough in ore prospecting in the Beishan area of Gansu prov⁃ ince，the geochemistry anomalies of Au，Cu，Pb and Zn have been identified in the area，and high-power induced polarization are carried out in the key research area. Through the induced polarization data process⁃ ing and analysis，three high-polarization anomaly zones are delineated.Based on the analysis of surface geological survey and physical property statistics，it is concluded that IP-2 anomaly is a favorable area for polymetallic mineralization. Two symmetrical quadrupole IP sounding profiles are arranged at the center of IP-2 anomaly，which further reveals the spatial distribution characteristics of induced polarization anomaly and provides reference for borehole layout. Finally，Section Ⅰ was verified by drilling It is found that the thickness of pyrite and polymetallic sulphide mineralized body is 11.84 m，which is consistent with the in⁃ duced polarization anomaly. However，pyrite was relatively developed in the strata，which brought certain interference factors. Based on the analysis of the results of drilling and trough prospecting，it is considered that the area has good prospecting prospects and can be further explored.

Key words: high power induced polarization, resistivity, polarizability, polymetallic sulphide