Geological characteristics and origin of IOCG ore body in Gaerqiong Copper-Gold Deposit,Tibet

Gaerqiong mine is located in the west of Bangong–Nujiang metallogenic belt.According to the previous studies,its tectonic environment in Gaerqiong mine is orogenic environment.The systematic mineralogical study of III ore body in Gaerqiong 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'characteristics.Contrasting with most typical IOCG deposits on world and combing geochemical analysis of data,we conclude that Gaerqiong 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 at Bangong-Nujiang metallogenic belt.