Abstract: Abstract:Based on the 1∶50,000 stream sediment survey in Tanshanzi-Huangcaoquan area of Gansu Province, the geochemical parameters of oreforming elements were calculated, and the distribution, correlation, and anomaly assemblages of these elements were analyzed accordingly. It is indicated that the main elemental geochemical anomalies are controlled by faults (Dashantou and Miaomiaojing fracture zone), stratigraphy (Jixian system, Cambrian system, and Ordovician system), and magmatite (Dashantou and Sangejing maficultramafic magma and Variscan granite). According to the characteristics of structures, lithologies, and geochemical anomalies in this area, the authors delineated four polymetallogenic prospective areas, namely Dashantou and Sangejing CuNi metallogenetic prospective areas, Miaomiaojing AuCuWMo polymetallogenic prospective area, Huangcaoquandong AuAg polymetallogenic prospective area. This work is expected to provide some insights for the future exploration.

Key words: stream sediment survey, geochemical feature, exploration prediction, TanshanziHuangcaoquan area, Beishan in Gansu