Abstract: Conventional Metallogenic prognosis is only capable of a qualitative research of deposit formation and controlling geological factors but fails to give quantitative values of their contribution degrees to the metallogenesis.BP ANN's highly nonlinear reflection function can well fit the highly nonlinear coupling relation involved in the metallogenesis process.Therefore, the Ann-based metallogenic prognosis model has higher prognosis accuracy than conventional models

Key words: Metallogenic prognosis model, Metallogenesis function, Nonlinear coupling relation, BP ANN