Abstract:Ga Erqiong mine is located in the west of Bangong–Nujiang metallogenic belt,According to the previous studies, its tectonic environment in Ga Erqiong mine is orogenic environment.The systematic mineralogical study of Ⅲ ore body in Ga Erqiong copper-gold deposit shows Ore minerals are mainly magnetite, hematite, chalcopyrite, bornite, native gold and so on; orebody wall rock alteration is variety, they mainly are silicified alteration, carbonated alteration, chlorited alteration, epidotizatied alteration, Sericited alteration, Skarnizatied alteration and other alterations. Ore fabrics show hydrothermal deposit’ characteristic. Contrasting with most typical IOCG deposits on world and combing geochemical analysis of data,we conclude that Ga Erqiong Ⅲ copper-gold ore body belong to IOCG ore body. Determination of the Ⅲ orebody's origin and complement of Gaerqiong deposit types are of great importance implication for exploration and evaluation atBangong-Nujiang metallogenic belt.