Abstract: The application of Induced polarization method in exploration of a lead-zinc mine in western Yunnan showed that the region depending on the rate of  M_s magnitude of the minimum charge was at 3% up to 21%, the background field is generally from 5% to 7%, the anomaly field generally 15%. The maximum apparent resistivity ρs is 910 Ω·m, and the minimum is only 25 Ω·m. So the anomaly field has a clear distinction with the regional background field. After exploration, an anomaly zone was delineated, and the proven antimony, lead-zinc veins were found. The application results show that through the induced polarization method can effectively delineate the distribution scope of induced polarization anomalies and its morphological characteristic to understand the buried depth and spatial occurrence of the polar body, thus effectively guiding the exploration works.

Key words: Induced polarization method, Apparent charging rate, IP anomaly, Exploration of Pb-Zn deposit