刚果(金)Lukuni铜钴矿区矿床地质特征及找矿前景

Geological characteristics and prospecting potential of the deposit in Lukuni Cu-Co mining area,DRC

Lukuni铜钴矿产于著名的中非铜矿成矿带,在区域上位于卢菲利弧形构造带外部褶皱推覆带中,区内地层以新元古代加丹加超群罗安群、孔德龙古群和恩古巴群地层为主。矿区地层呈复式褶皱形态产出,受推覆构造作用影响和后期断裂构造破坏,背斜核部南侧矿体被分割为3条,背斜北部1条矿体。矿体主要产于背斜核部南侧,主要赋存于罗安群矿山组(R2)白云岩为主的岩系中,呈层状和似层状产出。区内矿体以氧化和原生矿体为主,地表浅部为次生氧化富集型,深部原生矿体为层控型。该矿床类型为受地层、断裂、褶皱改造控制的层控型矿床。综合分析认为矿区北东方向、矿区南部区域仍有良好的找矿前景。

Lukuni copper-cobalt deposits are located in the famous Central-African copper metallogenic belt and in the outer fold nappe belt of the Lufilian arc structural belt.The stratum are dominated by Roan and Kundelungu and Nguba group,which belong to the katango hypergroup in Neoproterozoic.It's found that the strata in the mining area are shaped in the form of complex fold.The orebody is divided into three pieces on the south Lukuni anticline because of the nappe structure and later fault structures,the north has one ores.The orebodies are mainly seated in the south of core area of the Lukuni anticline,and mainly hosted in the rock series of Roan Group(R2)which is mainly composed by dolomite rock.The orebodies,as stratiform or stratoid,are mainly composed by oxidized ores and primary sulfide ores The orebodies are secondary oxygen mineral processing in surface and the deep primary sulfide are stratabound ores.The deposit type is a stratabound one controlled by strata,faults and folds.Comprehensive analysis shows that the north-east and south of the deposits still have a good prospecting according to the supplementary geological work.