Geological Characteristics And Prospecting Prediction In Wulian-juxian Ore Concentration Of Shandong

Wulian-Juxian Ore Concentration located in the outer zone of Western Pacific Ocean polymetallic metallogenic belt,on the east side of Yishu fault in North China platform,in the northwest of Jiaonan apophysis,and in the southwest margin of Jiaolai basin.It is an important metallogenic belt of gold,copper,lead and zinc in eastern shandong province.The Mesozoic volcanic rock as the main host rock of gold,cooper,lead and zinc deposits,distributed in the middle of the ore Concentration area with a north-easter direction.Based on the previous data,the prospecting prediction is carried out in the work area.ascertaining regional ore-controlling geological conditions,delineating areas of mineralization,geophysical and geochemical anomalies,and propose prospecting target areas for further work;According to comprehensive research,on the basis of building the geological model of metallogenic geological body,metallogenic structure,metallogenic structural plane,and metallogenic characteristics,a comprehensive prospecting prediction model is established by geophysical and geochemical data.There are three volcanic edifice in the ore Concentration area: Qibaoshan volcanic edifice,Changshan volcanic edifice and Hongshishan volcanic edifice.There are two medium sized deposits in qibaoshan volcanic edifice: Jinxiantou gold-copper deposit and Qibaoshan copper and polymetallic deposit.These two deposits are selected as typical deposits to research,confirm the quartz diorite porphyrite is metallogenic geological body;The metallogenic structure is cryptoexplosive breccia pipe and fracture;The metallogenic structure plane are cryptoexplosive breccia pipe;The indicator of metallogenic characteristics are cryptoexplosive breccia pipe,Specularhematite,silicification and pyrite.The characteristics of alteration is propylitization and secondary quartzite during the early mineralization.In main mineralization stage,the alteration include silicification,potassic alteration,sericitization,beresitization,carbonatation and gypsum.Perfects "Trinity" prospecting prediction theory,co nstructed comprehensive prospecting prediction elements table,established comprehensive prospecting prediction model.According to geophysical characteristics,high magnetics is displayed in volcanic edifice.Magnetic specimen testing indicated that there is no magnetism in Ore body.It is a important indicator for prospecting,as a basis for delineating target areas.According to geochemical characteristics,there is Au-Cu-Ag-As-Pb-Zn-Sb-Bi-Mo anomaly combination in Qibaoshan edifice.It is a important indicator for prospecting.According to the analysis of remote sensing characteristics,the deposit is located in the ring structure,the hydroxyl anomaly show in ring structure.The ring structure which related to volcanic edifice is a important indicator for prospecting.Comprehensive analysis of all data in ore concentration area,three prospecting targets are selected as follows: Hongshishan prospecting target(class A),Zhanglaozhuang prospecting target(class A)and Zanziya prospecting target(class B).