The Sandiao gold deposit is one of a typical gold deposit belongs to ductile shear fault zone of dadu river. All the ore-bodies located in the Plagioclase amphibolite and migmatization plagioclase amphibolite, which output in the contact of a mixed granite. The location of the deposit and No. Ⅰ, No. Ⅱand No. Ⅲ gold belt is controled by F1 and F2ductile-brittle shear fracture zones of the mining area. The gold ore-bodies locate in quartz vein of No.Ⅰand No.Ⅱgold belts. The gold mineralization is mainly hydro...