Abstract:Baoshan block is located in the middle and south section of Sanjiang Tethys tectonic domain. With many tectonic transformations, many intrusive activities of granite bodies occurred in the block from Early Paleozoic to Mesozoic - Cenozoic, resulting in the formation of a complex and unique metallogenic system and became an important Fe-Cu-Pb-Zn-Ag-Hg-Sn-Rare ore concentration area in China. Yangmeitian Cu-Pb-Zn polymetallic deposit is located in the southwest of Baoshan block. The ore-hosting stratum of the deposit is Upper Ordovician. The orebody occurs in the interlayer fault fracture zone in vein and lenticular shape. The interface between the orebody and the surrounding rock is clear and the occurrence is basically the same as the stratum. By carrying out the measurement of tectonic superimposed halos, there is an anomaly in the zoning sequence of the indicator elements. In addition, the complex assemblage of metallic minerals in the same ore body reflects the formation of the deposit as a result of multi-stage and multi-stage superposition. The deposit is a sediment-ShydrothermalSalteration deposit controlled by structure and lithology.