Abstract: Through carrying out prospecting work in Keyouqianqi Shengli town of Xing'anmeng,the surface is delineated as numerous Ag and Cu-based ore-bodies. All ore-bodies are produced in secondary north-west faults fracture zone of granodiorite, which are closely related with granite porphyry. Various geochemical data statistics of rocks in drillings show that Ag, Cu and other elements are enriched in granodiorite rather than other rocks, and mostly enriched in the fracture zone. It is thus concluded that the deposit belongs to the silver-copper polymetallic deposit with hydrothermal alteration type in the fracture zone.

Key words: Rock geochemistry, Hydrothermal alteration type, Silver-copper polymetallic ore, Daxing’anling ore belt