Abstract: Guanyinshan Copper Deposit is a sedimentary-hydrothermal reformation deposit of “five-story” metallogenic series in Dongchuan area，which is characterized by the spatial mineralization structure （the upper part of the deposit is copper orebody and the lower part the deposit is iron orebody）.The deposit is located at the eastern edge of Huili-Dongchuan Aulacogen of Kunyang Rift.Through the study of geological characteristics and geochemical characteristics of Guanyinshan Copper Deposit，the characteristics of ore-hosting rock and orebodies and the geological haracteristics of ores，alterations and mineralizations are analyzed.The resutls show that:①the deposit is mainly hosted in the sericite-slate and siliceous-slate of Middle Formation Dayingpan Group，and the orebodies are occurred as layered，stratiform-like and lenticular；②the slate of Dayingpan Group presents the characterizes of “low potassium and high sodium”，which δ34S value changes from 4.1‰ to 17.1‰，it is further show that the sulfur is mainly from magmatism and subordinately from seawater sulfur；③through the test of fluid inclusion in quartz，it is show that the two ore-forming temperature ranges are 182~238 ℃ and 242~392 ℃，the corresponding salinity （w（NaCl）） are 5.7%~13.2% and 18.2%~25.4%，according to the above test results，the metallogenic stage of the deposit can be divided into middle-low temperature and middle-salinity sedimentary metallogenic stage and middle-high temperature and low-high salinity metamorphic-reformation-enrichment metallogenic stage；④he deposit is strictly controlled by strata and tectonic，the sedimentary copper deposit formed in the early stage is reformed and enriched by the later metamirphic hydrothermal/tectonic thdrothermal along the structural fissures and structural planes，the genesis can be attributed to sedimentary-metamorphic-transformation type copper deposit.Based on the above analysis results，the Caiyuanzi-Guanyinshan，Maolu-Maoqiaoshan and Xiaoyingpan-Guodidang areas are delineated as the significant prospecting target areas in the mining area，the prospecting potential of the three prospecting target areas is large，they are worth conducting further prospecting work.

Key words: Copper deposit, “Five-story&rdquo, metallogenic series, Geochemical characteristics, Metallogenic model, Prospecting target area