Combining Geological and Geo‐Electrical Method to a Better Exploration for Deposits: A Case Study of the Xiaowangjiaduan Copper‐Polymetallic Deposit in Inner Mongolia, Northern China

The Xiaowangjiaduan copper‐polymetallic deposit in Inner Mongolia, northern China, is a recent discovery in the Da Xing'an Ling metallogenic belt. Geological and geo‐electrical studies to search and explore new resources were carried out in the Xiaowangjiaduan area. The Xiaowangjiaduan deposit is located within a large alteration zone, which is covered by slate, pyroclastic rocks, silicalite and Quaternary sediments. In this case study, a comprehensive exploration work was carried out, including surface geological mapping, measurement of induced polarization (IP) intermediate gradient arrays survey, EH4 magnetotelluric measurements sounding, and large‐power IP sounding. The IP intermediate gradient arrays survey revealed the mineralization–alteration system that exhibits obvious low‐resistance and high‐polarization anomalies, with a width of 350–650 m and a length exceeding 1500 m. The stratagem EH4 sounding profiles indicate that the mineralization system is characterized by a medium‐low resistivity anomaly, and is stable within the depth range of 300–600 m below the surface. The large‐power IP sounding reveals that the mineralized zone above −200 m is characterized by low resistivity and high chargeability, while the zone continues below the level of −200 m, where it is characterized by high resistivity and high chargeability. The integration of these methods provides a robust strategy for identifying a concealed mineralization zone, demonstrating their effectiveness in reducing exploration uncertainties and improving target accuracy.