Genesis Of Depoist And Prospecting Prediction In Yi Nanxianbaishiwo Ore Concentration Of Shandong

As an important mineral resource,gold is widely used in metallurgy,national defense,finance and other fields.Baishiwo area in yinan county is adjacent to jinchang gold deposit and tongjing gold deposit in yinan county.The study area is located in the north north east to Tang Wu-ge groove fracture and the auric field of the north west-Ma Mu pool fault location.The Paleozoic Cambrian,ordovician and Mesozoic cretaceous strata are widely distributed in the area.Gold-bearing copper magnetite ore: idiomorphic ~ semi-idiomorphic granular structure,metasomatic structure and metasomatic residual structure,massive or disseminated structure.The main metallic minerals are magnetite,pyrite,chalcopyrite,hematite and a small amount of arsenite nickel ore,mirrorite,porphyry copper and natural gold.The non-metallic minerals are garnet,diopside,chlorite and carbonate minerals.TFe is generally 20 ~ 30%,Cu content is generally 0.71 ~ 1.32%,Au is 1 ~ 5g/t,and gold carriers are pyrite,chalcopyrite and pyrite.Copper-bearing skarn type ore: idiomorphic ~ semi-idiomorphic granular structure,metasomatic structure and metasomatic residual structure,massive,disseminated,banded,veined or netted veined structure.The main metallic minerals are chalcopyrite,porphyry copper,pyrite,natural gold or silver-bearing natural gold and molybdenite,the main non-metallic minerals are garnet,diopside,chlorite,calcite,epidemite and so on.Most of the natural gold is distributed along the late chalcopyrite and tetrahedrite fissure or in pellets.Cu content generally ranges from 0.2 ~ 0.6%,and Au can reach 6 ~ 10g/t.Gold-bearing marble type ore: idiomorphic ~ semi-idiomorphic granular structure,metasomatic structure,block,breccia,veinlets or disseminated structure.The main metallic minerals are chalcopyrite,chalcopyrite,tetrahedrite and natural gold.The main non-metallic minerals are calcite,quartz and pellet chalcedony.Cu content is 0.3 ~ 0.9%,Au 2 ~ 5g/t.Yinan county in shandong province based on the existing data,such as the white stone nest gold,with weapons baishi nest gold orebody in the rock mass structural fracture zone of hydrothermal type gold ore body as the main research object,the characteristics of hydrothermal type,zoning and spatial distribution and metallogenic relationship,to the study on geochemical characteristics,and discusses the forming mechanism of hydrothermal alteration rock,the key areas of the mining area,the metallogenetic prediction.