Yimen Lion Copper Deposit, Geological Characteristics And Cobalt, Silver Occurrence Regularity

Shizishan copper deposit locates in the Yimen copper ore field east metallogenic belt of the KunYang rift,it is the typical sedimentary reformation middle scale copper deposit. Typital orebody of Shizishan copper deposit is the important research object in the thesis,according to weaks links which the deposit mineral association and the occurrence state enrichment regularity of cobalt and silver, based on the system field work, it carring out the copper minerals using optical microscope,sem energy spectrum analysis,phase analysis,Icp-Ms analysis etc,and then it identified mineral species,summarized ore structure and wall rock alteration characteristics, identified of metallizing ph'aze and mineral generation sequence,illustrated every stage mineral assemblage,revealed Enrichment regularit and occurrence state of cobalt and silver.Shizishan copper deposit mainly host strata are Yin min formation,Luo xue formation,Ertouchang formation,strata lithology ore-controlling is obvious,orebody mainly are layered,atratiform-like,irregular vein etc,according to orebody,occurrence and wall rock characteristics,the orebodies are divided into five types:slate type orebody,carbonate type orebody,sand stone type orebody,dilute mine delafossite orebody,basic rock delafossite mineralized body.The ore minerals mainly are chalcopyrite,borite and pyrite,the gangue minerals mainly are dolomite,quartz and calcite. the silver and cobalt carrier minerals are minly chalcopyrite and bornite and pyrite and cobaltite in the copper deposit,the cobalt occurrence state mainly independent minerals and isomorphism,silver occurrence state mainly native silver,isomorphism,sub-micro-morphology silver and dispersed state.in chalcopyrite and pyrite and bornite,silover form of isomorphism.The enrichment regularity of cobalt:in the formation, the content decrease in Luo xue formationâ†'Yin min formationâ†'Er touchang formation;the content decrease in carbonate type orebodyâ†'dilute mine delafossite orebodyâ†'sand stone type orebodyâ†'alkali gabbro mineralized bodyâ†'slate type orebody;the content decrease 7middle segmentsâ†'15middle segmentsâ†'13middle segments; The enrichment regularity of silver:the content decrease in Luo xue formationâ†'Yin min formationâ†'Er touchang formation, the content decrease in carbonate type orebodyâ†'dilute mine delafossite orebodyâ†'sand stone type orebodyâ†'alkali gabbro mineralized bodyâ†'slate type orebody;the content decrease 7middle segmentsâ†'13middle segmentsâ†'15middle segments;in the transverse,cobalt and silver content high in the two ends of 13formation orebody and the low in the intermediate, cobalt and silver content low in the two ends of 15formation orebody and the high in the intermediate;in the vertical, the content decrease in the two ends of orebody, the content increase in the intermediate of orebody.The occurrence state of the cobalt and silver determined that cobalt and silver are enrichmented in the mineral processing and recoveried in the smelting in the current technical condition,and then it provide important evidence for economic evaluation of deposit,components comprehensive utilization of cobalt and silver and rational recovery.