1. Development and Research Center of China Geological Survey,Beijing 100037,China 2. Technical Guidance Center for Mineral Resources of Ministry of Natural Resources, Beijing 100083,China 3. Tianjin Center, China Geological Survey, Tianjin 300170,China 4. China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083,China 5. Qiqihar Branch, Heilongjiang Institute of Geological Survey and Research, Qiqihar, Heilongjiang 150036,China
The Changtuxili Mn-Ag-Pb-Zn polymetallic ore deposit in Inner Mongolia was first discovered by 1∶50 000 soil geochemical survey; nevertheless, the area is covered with thick overburden and the recognition of surface outcrop is difficult. In order to further determine the favorable position for prospecting, the authors, based on the 1∶50 000 soil survey results, delineated seven IP anomalies by 1∶10 000 IP mid-elevator survey and bathymetry, and analyzed the scale and spatial location of buried polarizable body in sounding profile, thus effectively reducing the range of prospecting target area. Some sounding profiles were drilled to verify the discovery of multi-layered orebodies, which confirms the effectiveness of induced polarization method in prospecting in the study area. In addition, Jd6 is the largest IP anomaly found in the area, which can serve as a key target area for further prospecting. Based on summarizing the exploration work, the result provides a reference for prospecting in this kind of covered areas.
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