Abstract:Xiongmei area is located in Shenzha County, the middle part of Bangong Co-Nujiang metallogenic belt in Tibet. There are Shesuo skarn copper polymetallic deposit, Xiongmei porphyry copper-molybdenum deposit, Sangri karn copper deposits and Kuga skarn copper deposits. Accordingly, many sets of copper-bearing magmatic rocks are developed. In this paper, the age and genetic types of these copper-bearing magmatic rocks have been determined by systematic zircon U-Pb age, whole-rock Pb isotope, and petrogeochemical analysis. It is preliminarily ascertained that they formed in ~110 Ma (Shesuo, Xiongmei, Kuga) and 80 Ma (Sangri) magmatic stages successively. The Pb isotope indicates that the magma source areas are all from the upper crust, and the ore-bearing granodiorite porphyry in Xiongmei mining area is S-type granite formed by argillaceous sedimentary rocks with high aluminium and calc-alkaline characteristics. The ore-bearing rocks in the Shesuo, Sangri and Kuga mining areas are I-type, indicating that the original rocks are igneous. Geochemistry shows that these ore-bearing rocks are rich in large ion lithophile elements (Rb, Sr, Th, Pb) and depleted in high field strength elements (Nb, Ta, Ti), indicating that subduction sediment components have an important influence on magma formation. At the same time, the mineral separation and crystallization of ore-bearing magma from these crustal sources occurred during the process of uplift and emplacement: the granodiorite in Xiongmei mining area is mainly controlled by the separation and crystallization of biotite, the monzogranite in Shesuo mining area shows the trend of plagioclase crystallization, the Kuga mining area shows the trend of potash feldspar crystallization, and the Sangri mining area shows the trend of amphibole crystallization. Separation crystallization characteristics. These research results deepen the understanding of the copper-polymetallic metallogenic process in the middle part of Ban-Nu metallogenic belt and have important guiding significance for regional geological prospecting.