Combination features and exploration significance of natural heavy minerals from silver deposits

Based on the data of natural heavy minerals accumulated by the nationwide work of measuring the natural heavy minerals in the 1960s, the authors made a statistic analysis of the occurrence situation of 72 typical silver deposits (mining areas), calculated the frequency of occurrence of many kinds of natural heavy minerals and summed up the mineral assemblages of sedimentary volcanogenic silver deposits, sedimentary silver deposits, metamorphic silver deposits and intrusion silver deposits. The results show that there exist some similarities and differences in mineral assemblages of these four types of silver deposits. The natural placer mineral assemblages based on different types of deposits have significance for building the ore-prospecting model of natural heavy minerals.