刚果(金)SICOMINES铜钴矿床地质特征及成因探讨

刚果(金)SICOMINES铜钴矿处于非洲著名的赞比亚—刚果(金)铜钴成矿带西端,是一个铜金属量达千万吨的特大型铜钴矿床。结合区域成矿地质背景,以SICOMINES铜钴矿地质勘查成果资料为依据,对矿区地层、构造、矿体特征、矿石特征等进行了论述,并对矿床成因进行了探讨。结果表明,SICOMINES铜钴矿床受层位控制,新元古代Katanga(加丹加)系Roan(罗安)群为初始矿源层。卢菲利(Lufilian)造山运动(距今560～550Ma)过程中的构造活动和变质作用对矿床进行了改造,使矿化叠加和局部富集;此外近地表环境下的表生富集作用,导致了表生矿体的形成。该矿床成因类型属于沉积—改造型层状矿床。

Geological characteristics and Genesis of SICOMINES Copper-Cobalt Deposit in Congo(DRC)

SICOMINES Copper-Cobalt Mine is located in the western end of Africa Zambia-D.R.Congo copper-Cobalt mineralization,and its copper metal reserve is about 10 million tons of extra large copper and cobalt deposits.According to the regional setting of geology and mineralization,combined with the geological exploration information of SICOMINES Copper-Cobalt Deposit,the stratum,structure,ore body features,ore characteristics and genesis are discussed in this paper.Roan group of Katanga system is the initial source of metal.The deposit was transformed by post-metallogenic tectogenesis and metamorphism,which led to mineralization superimposed and local enrichment during Lufilian orogeny(560~550 Ma ago).In addition,the near-surface environment of supergene enrichment led to the formation of supergene ore body.SICOMINES Copper-Cobalt Deposit is considered as a sedimentary-reformation layered deposit.