Mo deposit types and mineralization assemblage characteristics in Qinling-Dabie Mountain area

Abstract：The Qinling-Dabie Mountain area, characterized by widely distributed Mo deposits with various types and large reserves, is an important non-ferrous and precious metal ore-forming belt in China and even in the whole world. According to characteristics of Mo deposits in such aspects as modes of occurrence, spatial relationship with magmatic rocks, mineral assemblage, attitude of ore body and hydrothermal alteration, the authors preliminarily divided Mo deposits in Qinling-Dabie Mountain area into 5 types, 7 subtypes and 10 Mo deposit types. Different types of ore deposits have different characteristics of ore-forming elements, which can be assigned to three assemblages： Mo(Mo-W-Re), Mo-Cu-Fe and Mo-Pb-Zn-Ag-Au. According to the new metallogenic theory, there exist four kinds of relationships between magmatic melt and ore-forming fluids, which can explain the geneses of these different types of Mo deposits. The systematization of the types of Mo deposits in Qinling-Dabie Mountain area has important theoretical and economic significance and can provide a theoretical support to the prospecting work.