| The research area is located in the north-central Xiaoxinganling polymetallic metallogenic belt, and tectonic place belong to Yichun-Yanshou geosynclinal folded system (Ⅳ), east adjacent Laoyeling plot (Ⅴ), west adjacent Xiaoxinganling-Songnen plot (Ⅲ). Research area experienced repeated tension crack and collage, Tectono-magmatic activities extremely development. So gold and polymetallic mineralization concentrated output in this area. Carrying out Ergu-Cuihongshan region polymetallic ore deposit geology characteristics and ore-forming geological conditions research and ealuateing the regional prospecting potentiality that have the important meaning of improveing the regional metallogenic prediction research theoretical level, guiding the follow-up exploration work deployment.The Stratums Mainly have Cambrian lead mountain group (∈Iq), Five-star town group(∈= 1w), ordovician Xiaojingou group(O2x), Dyas Tumenling group(P1t), Wdaoling group(P2w), Cretaceous Bnzifang (K1b), Ningyuanzu (K1n). Intrusive rocks widespread distribution in area and agmatic activity is frequent. Rock type are complex, exposeing from the sex to acid and alkaline. Activities long duration and activitie from the ordovician, the late Permian, the late Triassic, the late Jurassic to lower cretaceous. Controled by regional tectonic evolution, the fracture structure include north east, north west, east-west fracture and so on. They belong to the latter's low-order times or derived structure with regional north east to Jiayin-Mudanjiang lithosphere fracture the same.In research area,77 place of iron and polymetallic deposits (point) have been found. Important deposits include LuMing molybdenum deposit, Daxilin iron ore, Xiaoxilin lead-zinc mine, Cuihongshan Iron polymetallic deposit, Hongqiling Iron polymetallic deposit, Cuigang Iron lead deposit, Kubin lead-zinc deposit and so on. This paper study geological characteristics of typical ore deposits, analyse regional ore-forming geological conditions and evaluate related ore deposits and important prospecting target of prospecting potential evaluation.Studies suggest that, Polymetallic deposits in Yichun Ergu-Cuihongshan area are controlled by Yichun-Yanshou tectonic belt evolution characteristics.Strata Containing mineral and Yanshanian granitic magmatic activity and rupture structural control Yichun Ergu-Cuihongshan Polymetallic deposits. They constitute mineralization geological conditions of zone. According to statistical results of the regional stream sediment analysis results, we can know thatAu element displays a strong enrichment, and has a larger variation coefficient ingranite of ordovician-early Triassic, The cretaceous volcanics, marble in Xiaojingou group of Ordovician. Studing different period of igneous rocks and ore-controlling features of Yichun Ergu-Cuihongshan Polymetallic deposits, granitic magma activity of Ordovician and lower cretaceous period control polymetallic deposits and the formation and distribution of ore-forming of mineralization. They constitute a metallogenic dominant factors of the zone. Tungsten molybdenum, copper deposits and lead-zinc mineralization product in different ore-forming period and the same metallogenic environment.They make up the magmatic hydrothermal metallogenic series of Medium to high hydrothermal temperature to medium to low temperature.In the summarization of metallogenic conditions and enrichment regularity, we carry out integrated methods prediction research of geological, geophysical exploration and geochemical exploration, etc., and sure direction of prospecting. According to the comprehensive study of geochemical, we delineated 13 place of prospecting target area. There are five Best place of prospecting target for Cu, Pb, Zn. Cuibei etc of prospecting target area have potential of looking for Mo, W deposits. In addition, we should strengthen the exploration work deployment in polymetallic deposits (point) deep and periphery for looking for new mineralization or orebody.
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