Abstract:Based on analysis of geological background and characteristics of Dushan Biantong calcite deposit, the origin of the deposit has been studied. It is believed that the deposit is controlled by stratigraphy, lithology and structures. The Carboniferous carbonate rocks will provide material source for calcite deposit. Dushan fault is ore conducting structures of the deposit. The secondary tensile fault (F1) is ore bearing structure. The ore body is located at the location of change in fracture occurrence, and the deposit type belongs to hydrothermal filling type.