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| 中非卢菲利安造山带前陆盆地中超大型铜矿-卡莫阿铜矿地质特征与成因探讨 |
| Discussion on the Geological Characteristics and Genesis of the Super - large Kamoa Copper Deposit in the Foreland Basin of the Lufilian Orogenic Belt in Central Africa |
| 投稿时间：2025-04-13 修订日期：2025-06-29 |
| DOI： |
| 中文关键词: kamoa(卡莫阿) Kakula(卡库拉) 中非铜(钴)矿带 Lufilian弧 冰碛砾岩 裂谷盆地 |
| 英文关键词:Kamoa-Kakula Central African copper (cobalt) belt Lufilian arc glacial Grand Conglomerate rift basin |
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| 中文摘要: |
| 卡莫阿(Kamoa)铜矿是中非铜(钴)矿带中较为特殊的大型层状铜矿,其位于卢菲利安(Lufilian)造山带的前陆盆地区域,与产于褶皱推覆带的其他大型铜(钴)矿在地质特征及成因上有诸多不同之处。卡莫阿铜矿的主要赋矿层位是恩古巴群的冰碛砾岩,矿体以与恩古巴群地层宽缓背斜相协调的层状形式展布,根据矿层连续性分为北部的卡莫阿(Kamoa)矿段和南部的卡库拉(Kakula)矿段。卡莫阿矿段以黄铜矿矿化为主,而卡库拉矿段以辉铜矿矿化为主,且高品位赋矿部位也有细微差别。矿床成因推测主要与新远古代大陆裂谷盆地的持续发育有关。深部含矿热液沿裂谷期同沉积断层向上运移,与Sturtian冰期的冰川剥蚀物一同沉积形成松散沉积物,经压实成岩和区域变质作用,含铜硫化物围绕冰碛角砾或碎屑沉积物间空隙结晶析出成矿,后期经历了轻微改造(氧化作用)形成卡莫阿大型层状铜矿床。 |
| 英文摘要: |
| The Kamoa Copper Mine is a relatively special world-class stratiform copper deposit in the Central African Copper (Cobalt) Belt. It is located in the foreland basin area of the Lufilian Orogenic Belt, and has many differences in geological characteristics and genesis compared with other copper (cobalt) deposits in the fold - thrust belt. the main mineralization layer of the Kamoa-Kakula copper deposit is the‘Grand Conglomerate’, which was glacial (Sturtian) and post-glacial deposits of Nguba Group. The mineralization layer coordinated with the wide and gentle anticline of the Nguba Group layer. According to the continuity of the mineralization, the mine was divided into two section, the Kamoa section in the north and the Kakula section in the south.SThe dominate copper minerals of Kamoa is chalcopyrite, while the Kakula is chalcocite, and there are slight differences about the high-grade position.SThe genesis of the mineralization was considered mainly related to the continental rift continuous development of Neoproterozoic.SThe metallogenic mechanism of the Kamoa-Kakula deposit was thought that the deep magma source hydrothermal fluid migrated upward along the syn-sediment faults, which control rift basin extension, and mixed with glacial erosion material in Sturtian Ice Age, deposited and formed loose sediments layers containing copper-rich fluid. After compaction and regional metamorphism, copper minerals crystallized and disseminated in the rock layers, and underwent slight transformation (oxidation) in the subsequent geological history, then formed the copper deposit. |
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