Abstract: Boniangou Gold Deposit is located in Garzi-Litang suture zone，which is one of the important Au-polymetallic metallogenic belts in Sanjiang region.In order to seek the prospecting breakthrough of the mining area and speed up the progress of the prospecting work of Boniangou mining area，the regional metallogenic geological background，geological characteristics of the deposit，geological characteristics of the orebodies and ore characteristics are analyzed in detail based on the geological working results of Boniangou mining area.The study results show that:①the gold mineralization type of the mining area belongs to the fracture zone alteration rock type， the ore-controling factor is mainly for a group of NNW-trending fault，the copper-molybdenum mineralization belongs to porphyry copper molybdenum ore type，the corresponding ore-controlling factor is monzonite diorite porphyry；②the metallic minerals are mainly for pyrite，native gold，molybdenite，chalcopyrite and limonite，the gangue minerals are mainly for quartz，feldspar，sericite and chlorite，the gangue mineral content in different wall rock alteration belt and orebodies have bigger difference；③the results of geochemical exploration show that there are anomalies of Au， Ag， Zn， Pb and other elements in Geshu ore section，where Au has an extreme value of 214 ×10-9 and the number of concentration center is 7；Cangjin ore section have the anomalies of Pb， Zn， Cu， As and other elements，and the anomalies have better associativity with each other，the prospecting potential of the above two ore sections are both good.Based on the above analysis results，the favorable prospecting indicators of the mining area are summarized，besides that，the further study results indicated that except for the structural alteration rock type gold deposit，the porphyry deposit also has prospecting potential in Garzi-Litang suture zone.

Key words: Structural alteration rock type gold deposit, Geological characteristics, Stream sediment survey, Soil geochemical survey, Deposit genesis, Prospecting indicator