The Study Of Alteration And Associated Element Of Copper Porphyry Copper Deposit,Dexing,Jiangxi Province

In recent years,the research on the porphyry copper deposit in Dexing,Jiangxi province,has made great progress.In the new situation of advocating comprehensive utilization of resources and circular economy,the study of associated elements is particularly important.The latest research results of the two mining areas in recent years was summarized and sorted out in this paper.The characteristics of porphyry copper deposits in Dexing are studied and compared with the VMS deposits.The alteration belt and altered rock of the deposit were studied in detail,and the correlation of the main associated elements was summarized.The samples of molybdenite-the main ore containing Re in the alteration belt of the Tongchang and Fujiawu mining area,were analyzed by phase analysis.The study shows that the distribution of ore bodies in the two mining areas is different,but the mineralization age and alteration mineralization type are basically the same.The enrichment of large ion lithophilic elements and light rare earth elements in Tongchang and Fujiayu mining area indicates that partial melting of granite diorite porphyry body is not high.The associated elements Au and Ag are positively correlated with alteration strength and Cu mineralization strength.Au content in Tongchang: rock mass>surrouding rock,which is opposite to Fujiawu.The Ag contents in the two mining areas are same: surrounding rocks > rock mass.Co is mainly related to pyritization,Co and Cu content distribution is stablein.The content of Re and Mo elements on one side of the surrounding rock is higher than that on one side of the rock mass in the Tongchang mining area,while the content in the Fujiayu mining area is opposite.And the correlation with Mo is as high as 0.932,mainly concentrated in the quartz-sericite belt around the porphyry body.Phase analysis shows that rhenium occurs in molybdenite in four phases: rhenium setoxide,rhenium dioxide,rhenium trioxide and rhenium disulfide,mainly in the form of rhenium dioxide and rhenium disulfide,and the content of the latter is much higher than the former.The closer to the contact zone of rock mass,the higher the mineralization degree and Re element content.The Re element content of the sample in Fujiawu mining area is higher than that in the Tongchang mining area.Combined with the occurrence status of Au,Ag and Co elements in molybdenite,the content of C and S in ore,and the content characteristics of Re and other elements in heap leaching site,it provides data reference for the specific processing of ore.