Geological Characteristics and Deposit Genesis of Jinmuda-Nanmuda Gold Belt in Sichuan Province

The geotectonic position of Jinmuda-Nanmuda gold deposit belt belongs to Songpan-Ganzi geosynclines fold system.In recent years,many gold deposits which are Jinmuda gold deposit,Nanmuda gold deposit and Dailong gold deposit have been found in the belt.Through summarizing and analysis the geological characteristics and metallogenic factors of typical gold deposits,we found that the gold mineralization enriched in the Triassic xinduqiao group,which provided a primary source for the formation of the ore belt layer.In addition,magmatic rocks and faults in this area also is important control factors of gold mineralization.Since Triassic,characteristics of the tectonic evolution,the hydrothermal solution and the mineral migration reflects the gold deposit genesis in the belt belongs to hydrothermal-tectonic altered rock type.