安徽铜陵凤凰山铜矿床地球化学特征及其意义

通过对凤凰山铜矿床化探样品测试数据的系统分析研究,初步确定了本矿床在成矿作用过程中至少经历了两次大的热液流体活动:第一次是花岗闪长岩的侵入,不仅是岩浆热液使成矿元素迁移富集,而且在岩体侵入过程中强大热能的驱动下地层中的大气水参与流体的对流循环,使地层中的成矿元素被迁移;第二次是石英二长闪长岩的侵入,它在带来大量成矿物质的同时,也使地层中、特别是前期花岗闪长岩中的成矿元素在大气水的对流循环作用下被迁移并在岩体边缘及附近富集成矿.

THE CHEMICAL CHARACTERISTICS AND SIGNIFICANCES OF THE FENGHUANGSHAN COPPER DEPOSIT IN TONGLING, ANHUI PROVINCE

By the systematical analysis on geochemical prospecting data in the Fenghuangshan copper deposit at Tongling of Anhui Province, it is preliminarily ascertained that the deposit had undergone at least two main hydrothermal activities during metallogenesis. The first activity is granodiorite magmatism, enabling metallogenic elements re-movement and concentration not only in magmatic fluid but also in strata, because the meteoric water in strata participated fluid convective circulation by the heat force provided by granodiorite magmatism. The second activity is quartzite monzodiorite magmatism, providing ore-forming materials and enabling metallogenic elements in strata, especial in granodiorite, activation, re-movement and concentration in rock mass boundary and nearby region by the convective circulation of meteoric water.