Yunnan province can be divided into 11 Sb (Au) metallogenetic zones. Sn-Au belongs to the same metallogenetic series (Sb slightly later); which are commonly in paragenesis. The Pojiao Formation of East Yunnan and the Sanhedong Formation of West Yunnan are the Sb ore source beds. In southeastern Yunnan Province and western Guizhou Province, the Sb, Au background in the Dachang bed of earlier period of basalt effusion, basalt formation of main period and the later Longtan Formation(P3l) are further higher than that of the basalt in the world, which form the united Sb-Au ore source bed(rock). And under the advantageous structural conditions, Sb deposit (paragenetic Au); Au deposit (paragenetic Sb) or the existence of Sb together with Au (Tangshang, Guangnan) are formed.
