Lemagesahan is a mineral resource area newly discovered by the Institute of Metallurgical Geology and Exploration of Iiaoning Bureau of Metallurgical Geology and Exploration and it has been proven through investigation a meso-thermal Pb-Zn deposit related to volcanic hydrothermal fluid and it is con trolled by NW cataclastic altered fraetural zone. Pb-Zn mineralization occurs in the cataclastic altered frac rural zon and morphology of the ore body is simple. Mineralization of the deposit is divided into volcanicsedimentary diagenesis→low grade regional metamorphism→structural(fracturing, magma intruding and volcanic activity) rework stages. The paper expounds geological characteristics of the ore bodies and dis cusses genesis of the deposit then the ore prospecting marks are pointed out.