福建紫金山铜矿床深部铜硫矿物空间分布特征初探

紫金山铜矿床深部铜硫矿物种类丰富，通过自上而下针对铜硫二元体系矿物系统采样，经手标本观察后利用矿相显微镜和电子探针分析，共检测出5种Cu-S体系矿物，包括蓝辉铜矿、铜蓝、斜方蓝辉铜矿、吉硫铜矿和久辉铜矿，含矿层Cu-S体系矿物组合自上而下分为4带，分布标高自300~-130m，主要铜矿物为蓝辉铜矿、铜蓝、斜方蓝辉铜矿，次要铜矿物为吉硫铜矿和久辉铜矿；通过对岩性和铜硫矿物组合的分析，深部铜矿体为可分为2层铜矿体，上段铜矿体铜硫矿物组合类型为铜蓝-斜方蓝辉铜矿-蓝辉铜矿，下段铜矿体铜硫矿物主要为斜方蓝辉铜矿；矿床深部随着标高的降低，硫逸度和氧逸度逐渐上升，暗示着矿床深部具有较好的斑岩型矿床找矿远景。

Preliminary study on spatial distribution characteristics of copper sulfide minerals in deep Zijinshan copper deposit, Fujian province

Cu-S minerals in deep Zijinshan Copper deposit are abundant, by sampling Cu-S series minerals systematically from top to bottom, 5 kinds of Cu-S system minerals were detected by means of ore microscope and electron probe after hand specimen observation, including digenite, covellite, anilite, geerite and djurleite. Cu-S series minerals of the ore bearing layer is divided into 4 bands from top to bottom whose distribution elevation was from 300m to -130m. The main copper minerals were digenite, covellite, anilite, The secondary copper minerals were geerite and djurleite. The deep copper ore body can be divided into 2 layers through the analysis of lithology and copper sulfide minerals, Cu-S series minerals of upper ore-body was covellite-anilite-digenite and lower ore-body was mainly anilite. In deep part of deposit, the sulfur fugacity and oxygen fugacity gradually increase with the decrease of the elevation, implying that there would be a good prospect for porphyry deposit prospecting.