Abstract:

This paper summarizes the features of the Hadatetaolegai Pb-Zn-Ag polymetallic deposit of Inner Mongolia and analyses the relationship between the regional strata, structures, magma activities and Pb-Zn-Ag minera-lization. The isotopic studies on the H, O, Pb and S in the ore bodies show that the metallogenic fluids derived mainly from magma in early stage and mixed with some meteoric water in late stage. The sulfides formed in early metallogenic stage were related to deep-seated magmatic activities and the one in middle to late stages generated by reaction between magmatic fluids and host rocks or produced by mixture between magmatic fluids and meteoric water. The metallogenic processes of silver, lead and zinc as an important component in Yanshanian tectonic-magmatic activity is the production of mediate to acid magmatic activities. It is a hypothermal filling and metasomic type of deposit at middle to high temperature condition.

Key words: Hadatetaolegai, lead-zinc-silver polymetallic deposit, metallogenic characteristic, genesis, Inner Mongolia