Abstract: Baimashan lead-zinc mine of Yingjiang is located in Tengchong-Lianghe polymetallic metallo-genic belt of “Sanjiang”in Yunnan Province, The lead-zinc orebody occurs in the fracture zone of thefirst member of Cuanshang formation of Lower Devonian. The shape of the ore body is vein-like and len-ticular, the expansion and shrinkage, reappearance are common phenomenon. The ore body is strictlycontrolled by the strata and structure, especially closely related to interlayer faults. Based on the site in-spection, the author thinks that the Baimashan lead-zinc deposit is a hydrothermal filling vein deposit.The wall rock alterations related to mineralization are skarnization, sericitization , limonite mineralization.carbonation and silicification. Soil geochemical anomaly can also be used asimopor-tant prospecting indi-cator in this mining area.

Key words: geological characteristics:, ore-prospecting indicator, hydrothermal filling: Baimashan lead.zinc mine