Abstract: The Chongmuda copper deposit in Sangri, southern Xizang is considered as skarn-type copper deposit, and was hosted in the Bima Formation of the Upper Jurassic -Lower Cretaceous Sangri Group which has been subjected to the skarnization and regional epimetamorphism. The copper orebodies (mineralized orebodies)in the deposit mostly occur in diopside garnet skarn and skarnized marble in the third to fourth members of the Bima Formation along or around the frac-tured zones. The formation (mineralization)of the copper deposit is involved in two phases of skarnization and formation of the hydrothermal sulfides.