摘要
玻利维亚“红层”铜矿是南美洲大陆除了有斑岩型这类世界级铜矿床外的另一类特殊的铜矿床,分布于阿尔蒂普拉诺(Altiplano)高原的第三系红色沉积岩系中,其成因与火山作用关系密切,即成矿物质来源于火山热液。受断裂构造控制明显,这表现为两个方面原因,一方面构造为火山热液通道,控制着成矿来源,另一方面则是断裂构造可以使原生矿氧化淋滤更为充分。“红层”铜矿的原生矿一般不具工业价值,但通过后期次生富集,能形成多个小型的高品位富矿包,可以适应小规模开采。本文通过分析“红层”铜矿的矿体特征、赋存空间、控矿因素等地质条件,认为该类型矿床深部找矿空间较为有限,但对于深部是否存在斑岩型铜矿需进一步探索。
Bolivia’s“red-bed”copper deposits represent a unique type of copper mineralization in South America,distinct from world-class porphyry-type deposits.These deposits occur in Tertiary red sedimentary rock series within the Altiplano Plateau and are closely associated with volcanic activity,with ore-forming materials derived from volcanic hydrothermal fluids.Their distribution is strongly controlled by fault structures,which serve two key roles:as conduits for volcanic hydrothermal fluids,governing the source of mineralization,and as pathways facilitating oxidation and leaching of primary ores,enhancing secondary enrichment.While the primary mineralization of“red-bed”copper deposits generally lacks economic value,subsequent supergene enrichment can form multiple small but highgrade ore pockets suitable for small-scale mining.Based on an analysis of geological factors such as orebody characteristics,host rock environments,and ore-controlling structures,this study suggests that the deep exploration potential for this deposit type is relatively limited.However,further investigation is needed to determine whether porphyry-type copper deposits exist at greater depths.
作者
李莉
刘运锷
周守余
姜海
夏瑜
LI Li;LIU Yun’e;ZHOU Shouyu;JIANG Hai;XIA Yu(China Nonferrous Metals(Guilin)Geology and Mining Co.,Ltd.,Guilin 541004,China;CNMC(Guangxi),Pgma Co.,Ltd.,Hezhou 542800,China)
出处
《中国矿业》
北大核心
2025年第S1期668-672,共5页
China Mining Magazine
基金
中国有色集团矿产资源项目筛选与评价项目资助(编号:中色投资[2021]35号)。
关键词
“红层”铜矿
矿床成因分析
安第斯成矿带
矿产资源潜力
玻利维亚
“red-bed”copper deposit
genesis analysis of the deposit
Andean metallogenic belt
mineral resource potential
Bolivia
