Abstract:The Liwutype copper deposit refers to stratiform or stratiformlike or lenticular Curich ore deposits occurring in the suture zone between the western margin of the Yangtze block and SongpanGanzi fold belt. Research of geological features, mineralization type and mineralography indicates that the Liwutype copper deposit belongs to hydrothermal deposits. In order to accurately constrain the metallogenic age, we performed NTIMS ReOs geochronological dating for the chalcopyrite from massiveveined ores. The results show isochron ages of chalcopyrites ranging from 1502±49 to 1511±48 Ma (2σ), indicating that the Liwutype copper deposit formed in the Late Jurassic, distinctly later than the sedimentary time of the wall rock (Liwu Group), but roughly close to the age of the granite outcropping at the edge of Jianglang dome. Initial 187Os/188Os value of chalcopyrites is 365±029, suggesting that the oreforming materials came mainly from the continental crust, probably from the Liwu Group. Combined with the tectonicmagmatic events of the dome, this paper proposed that the magmatic thermal uplifting caused by the early Yanshanian extension in the SongpanGanzi fold belt not only provided thermal forces and partial fluids for Cu mineralization, but also led to the formation of oreinducing and orecontaining structure space. Therefore, magmatic thermal uplifting was the key factor of the formation of Liwutype copper deposits.