Geological Characteristics And Metallogenic Regularity Of The Yang He Wu Cu-ni Deposit In Huili County

YangHe wu Cu?Ni deposit is located in the south of Si Chuan province.Regional tectonics is located at Southwest margin of sichuan?yunnan ancient island arc belt of Yangze ancient plate,north of HuiLi?Dongchuan depression.The complex geological structure and frequent magmatic activities provide favorable time,space and material conditions for the formation of various types of mineral deposits.At present,there are 5 major ore bodies in the mining area,The main ore body of?3?ore body,which is stratiform and produces locally with branching phenomenon.The strike length is about 700 meters,and the slope reaches 842 meters,and the maximum depth is689 meters.Through the comprehensive study of drilling,catalog of trial trench and all kinds of data,the control degree of Cu?Ni ore body is explored,and the occurrence location,shape,scale,occurrence,thickness and variation of ore body are ascertained.The strata of the YangHe wuCu?Ni mine in Huili county are mainly exposed?Pt₂l?and?Pt₂h?.The mining area is located in the northeast of the estuary anticline.Yanghe wu?basilical?ultrabasic rocks are mainly composed of olivine?olivine diabase?diabase?diabase?gabbro.According to the rock assemblage,lithofacies distribution and correlation of the Yanghe Wu rocks,an intrusive stage and five lithofacies are divided.Yanghe ore?bearing rock is a rock mass formed by the slow local melting of olivine tholeiite?low aluminum,low calcium type?and emplacement along the fault movement.The disseminated structure of the ore indicates that there is mineral?bearing hydrothermal activity in the later stage of magmas.Under the action of hydrothermal mineralization,metal sulphides and metal oxides are formed and superimposed on the star?point disseminated ore to form the fine?vein disseminated ore.The metallogenic types are Cu and Ni mineralization.The types of ore minerals,gangue minerals,syngenetic assemblages and the structural characteristics of ore have been found out.The deposit is a magmatic hydrothermal deposit.In the end,the scale of mineralization,the rule of enrichment,the genesis of the ore deposit and the mineralization are discussed preliminarily.