1. College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China;
2. Heilongjiang Geophysical Exploration Institute, Harbin 150036, China;
3. Bureau of Geophysical Prospecting INC., CNPC, Tianjin 300457, China

Collect gravity, magnetic and electrical data in the skarn mining area in the upper of Xiagalai Aoyi River in Huzhong district, Great Xing'an Range Heilongjiang Province. It is mainly based on 3D DC induced polarization (IP) method, supplemented by high-precision magnetic method on the ground and high-precision gravity. Three-dimensional inversion are performed on the collected data, then density, magnetic susceptibility, resistivity and polarizability three-dimensional geophysical models of the study area are established. Based on the geological conditions of the mining area and analyzing the 3D inversion results, the authors determine that the mineralization type of this mining area is the skarn formed by the Early Cretaceous middle acidic intrusive rocks and the marble of the Jixianggou Formation of the Upper Proterozoic- Lower Cambrian Wolegen Group rock type deposit. By analyzing the correspondence between two known ore bodies in the mining area and the 3D inversion results, the authors conclude that low resistance, high polarizability, and high magnetic susceptibility anomalies are important signs for finding skarn-type ore bodies. According to the ore prospecting sign, a new metallogenic prediction area is circled in the mining area, and the metallogenic prediction area can be further studied.