【摘要】 通过对赞比亚中央省瑞娜铜矿区钻孔岩芯的系统研究,作者认为该区的含矿围岩为典型的火成碳酸岩,详细的岩矿相学研究也揭示瑞娜铜矿为碳酸岩岩浆型铜矿床。岩浆发生液态不混溶作用,溶离出碱性硅酸盐熔体、金属硫化物熔体和挥发份(CO2、H2O、F、Cl、B、P等)等流体,岩浆所携带的碱质使接触带地层交代蚀变成霓长岩,挥发份以络合物的形式携带部分Cu、Au、Ag、Ga、Co、REE、Ni等金属元素在外接触带地层碎裂岩和内接触带处成矿。更多还原

【Abstract】 Through the systematic observation of drill core samples collected from Ruina copper ore field in central province of Zambia, the authors conclude that the copper-bearing country rock is a typical carbonatite with magnetic origin. The detailed study of mineral assemblages and petrographical characteristics also indicate that the Ruina copper deposit is a magmatic carbonatite-type cooper mineralization. When the magma evolved into the immiscible stage, the alkali-containing silicate melt, sulfides melt and volatile components (including CO2, H2O, F, Cl, B, P)are dissolved. The alkali compositions accompanying the magma reacted with the contact host rock, then the fenite was formed; and the volatile components which contain mineralization elements such as Cu, Au, Ag, Ga, Co, REE and Ni in the form of chemical complex deposited in the fractures of host rocks within the outlier contact zone as well as inner contact zone. The result of this study will be useful and meaningful for mineral prospecting in this region.更多还原