Analysis of Geological Background of Gold Mineralization in the Garze – Litang Fault Belt

Garze-Litang Fault Zone, in Western Sichuan Province, was situated tectonically in boundary area between the giant SongPan-Garze Orogenic belt and Yidun Island Arc. Garze Litang fault belt is a mutiperiodic activity fault zone, its evolution are complex. At Late Permian to early Triassic performed as an oceanic rift. At Late Triassic oceanic crust subduction to west, produce high pressure metamorphic belt, formed trench arc basin system in the west. At the end of the late Triassic arc continental collision, intracontinental fold belt and remelting granite are development in yanshan period. At Tertiary, fault basin and nappe tectonic belt are developed.Mainly performed as thrust, translation shear zone at this day and age, there are still some fracture seismic activity. The zone is exposed by the ultrabasic rock, layered gabbro, diabase walls, basalt, siliceous rocks and deep water turbidite of ophiolitic melange, and late Triassic volcanic sedimentary rock, the representative of the west island arc environment and the late Triassic flysch sedimentary, which the representative of the eastern passive continental margin the environment (Xikang group), along the fault zone, shows different sizes of tectonite sheet and clamp block mixed, has the characteristics of stratified disorder as a whole.