中非铜矿带多层位成矿特征及成因

中非铜矿带位于刚果(金)—赞比亚的Lufilian造山带,新元古界加丹加超群发育有大量的沉积岩容矿层状铜矿(SSC),为了解铜矿床的成矿特征和矿床成因,对矿床地质特征进行总结,发现中非铜矿带主要为还原相型和砂岩型层状铜矿床,具有明显的多层位层控特征.其中加丹加铜钴矿带(KCB)盛产还原相型铜矿床,主要赋存于Roan群M...

Genesis and characteristics of multilayer metallogenesis in the Central African Copper Belt

The Central African Copper Belt is located in the Lufilian Orogenic Belt between the Congo (DRC) and Zambia. In the neoproterozoic Katanga supergroup, there are a large number of The Sediment-Hosted Stratiform Copper Deposits (SSC). In order to understand the metallogenic characteristics and genesis of copper deposits, summarize the geological characteristics of copper deposits. It is found that the Central African Copper Belt is mainly composed of reduced-facies type and sandstone type, has obvious characteristics of multilayer hosted. The Katanga Copper-Cobalt Belt (KCB) is rich in reduced-facies copper-cobalt deposits, mainly occurring in the Mines Formation of Roan Group (R2), copper deposits and zinc-copper deposits are developed in the Nguba Group. Most of the reduced-facies copper deposits in Zambian Copper Belt (ZCB) occur in the the Ore shale (RL7) of Kitwe Formation from Lower Roan Group, and there are sandstone type copper deposits in the Lower and Upper of the Ore shale (RL7). Combined with recent research results, the multilayer metallogenic characteristics of the Central African Copper Belt are the origin of brine metasomatism. The multilayer copper (cobalt) ore bodies and mineral zonation of hematite- pyrochalcoite- porphyry- chalcopyrite- pyrite is formed by the reduction of oxidized ore-bearing brine with organic-bearing sediments and reducing fluids.