TECTONO-GEOCHEMICAL CHARACTERISTICS OF THE DUCTILE SHEAR ZONE TYPE GOLD DEPOSIT IN KAN GGUL, XINJIAN G

Kanggul gold deposit occurs in a second-order shear zone within a large-size ductile shear zone on the northern margin of Carboniferous island arc volcanic area.Orebodies,hosted by altered phyllonite and mylonitized volcanic rocks,are parallel to the steep-dipping mylonite zone.The wall rock alterations include silicification,chloritization,sericitization and pyritization.Geological studies show that the tectonic altered metallogenic characteristics have zoning phenomenon.The doposit is a product of polyphase evolution.The ore materials were derived from volcanic rocks.The ductile shearing is not only an ore controlling structure,but also a kind of mineralization by its ductile deformation and metamophism.A model of metollogenesis of ductile shear zone gold deposit of Kanggul is established.