Abstract:This paper concentrate discussions on the relationship among the deposits in Baiyinchang copperpolymetallic orefield, metallogenic element zoning mechanism and identification of spilitekeratophyre. Based on the field investigation and previous research results, the authors consider that Huoyanshan and Zheyaoshan deposits were under the control of the same antiform, the former was situated in the south limb, the latter was located in the north limb, and its orebodies have been inverted. The deposits in Baiyinchang copperpolymetallic orefield were situated in different locations of the effusive mineralization system. Zheyaoshan and Huoyanshan deposits are near hydrothermal vent type deposit, and distributed in the caldera of the volcano dome center. Sifangshan, Sigequan and Xiaotieshan zincleadcopper deposits are far hydrothermal vent type deposit, and distributed in the slope depression of the volcano dome. Huangyakou leadzinc mineral occurrence distributed in the submarine depression, where is far away from the hydrothermal vent. During the process that Baiyinchang copperpolymetallic orefield was forming, seawater participated in percolation under high temperature conditions, so the normal volcanic rock turn into the spilitekeratophyre, usually its Na2O content greater than 3.5 percent. The spilitekeratophyre is an important prospecting criteria, we can use the Na2O-SiO2 diagram to distinguish the spilitekeratophyre from the normal volcanic rock. The more spilitekeratophyre, the better condition of mineralization. On the contrary, the less spilitekeratophyre, the more unfavorable condition of mineralization.