1. Jilin Institute of Geological Sciences, Changchun 130061, China;
2. College of Earth Sciences, Jilin University, Changchun 130061, China

In order to determine the prospecting potential of Kaoshantun silver-lead polymetallic deposit in Inner Mongolia, the authors extracted the geology, aeromagnetic excitation and geochemical prospecting information. The results show that the Kaoshantun silver-lead polymetallic deposit is a medium scale of deposit which mainly contain silver accompanied by lead and zinc, which occurs in both of moyite in Early Cretaceous and tuff in Late Jurassic. The alteration and mineralization characteristics show that the genetic type of the deposit is medium hydrothermal vein type. The volcanic rocks in Upper Jurassic Manitu Formation are rich in Pb and Ag, and are favourable ore hosting rocks. The faults near the volcanic rocks and rock contact belts are favorable ore controlling structures, and the phyllic alteration and silicification are closely related to the alteration of surrounding rocks. The diverse uplift occured after mineralization, the mineralization in the middle and northeast of the exploration area is mainly galena and associated silver minerals, and the deposit was well-preserved as alteration belt ��and alteration belt ��. The southwest of exploration area is mainly sphalerite (chalcopyrite), with high degree of denudation, for example alteration belt��, which is characterized by medium-high polarization, low or high resistance, low-high magnetic anomaly. The anomalies are good identity of concentration for Pb, Zn, and Ag elements, with large abnormal area of Pb and Ag. The KHt4-11 distribution with high abnormal intensity has a good preservation condition and prospect. The Zn anomaly area is large, and the abnormal distribution of Pb and Ag anomaly in the outside of the KHt1 and KHt3 distribution area is large with poor prospecting potential.