刚果(金)Siniapamrara铜钴矿床地质特征及成因

Siniapamrara铜钴矿床位于加丹加铜钴成矿带弧形展布的北西地段,本文对矿区地层、构造、赋矿层位及矿化特征等进行了综合分析:矿区出露的地层主要是新元古界加丹加超群罗安群、恩古巴群、孔德龙古群为主,断裂构造分为两类,一类位于推覆体与地层接触部位;另一类为常规断裂。铜钴矿体主要呈囊状、透镜状形式赋存在断裂破碎带内的R2.1.3含矿地层,具有明显的层控特征,矿石类型为氧化型铜钴矿石。总结矿区控矿因素主要体现在:推覆体、地层和断裂构造3个方面,最终推测该矿床应为经历了沉积成矿、构造和热液改造,后期主要受推覆构造作用影响以及次生氧化富集作用4个阶段,并严格受推覆面控制的层控型铜钴矿床。根据工作程度,提出了下一步工作方向。

Geological characteristics and genesis of the Siniapamrara Cu-Co deposit in Democratic Republic of Congo

The Siniapamrara Cu-Co deposit is located in the northwest part of the arc distribution of the Katanga Cu-Co metallo?genic belt.In this paper,comprehensively analyzed the strata,structures,ore bearing horizons and mineralization characteristics of the mining area.The exposed strata in the mining area are mainly the Roan and Nguba and Kundelungu group of the Katanga hypergroup in Neoproterozoic.There are two types of the fault structures,one is located in the contact part between the nappe and the stratum,the other is the conventional fault.The Cu-Co orebodies are mainly in the form of cystic and lenticular,which are hosted in R2.1.3 ore bearing strata in the fracture zone,with obvious stratabound characteristics.The ore type is oxidized Cu-Co ore.It’s concluded that the ore controlling factors in the mining area are mainly reflected in three aspects:nappe,stratum and fault structure.Finally,it is specu?lated that the deposit should be a stratabound Cu-Co deposit which has undergone sedimentary mineralization,structural and hydrother?mal transformation,and is mainly affected by nappe tectonism and secondary oxidation enrichment in the later stage,and is strictly con?trolled by the nappe.According to the working degree,the next working direction is put forward.