贵州贞丰-普安金矿主要载金矿物黄铁矿浅析

Analysis of the main gold bearing minerals pyrite in Zhenfeng Pu an gold deposit,Guizhou

以位于研究区处于贵州省贞丰县的黔西南卡林型金矿床载金矿物黄铁矿为研究对象,利用光学显微镜、电子探针点分析和同位素分析技术,对本区金的赋存状态以及主要载金矿物的典型特征进行研究。研究结果表明:含砷黄铁矿可划分为四个世代;黄铁矿1(Py1)黄铁矿2(Py2)黄铁矿3(Py3)黄铁矿4(Py4);金矿床中主要的载金矿物为含砷黄铁矿,次为毒砂。研究区的矿床载金黄铁矿粒度细小且大多数黄铁矿具有环带结构。

Taking pyrite,a gold-bearing mineral in the Carlin type gold deposit in Zhenfeng County,Guizhou Province,as the research object,the occurrence state of gold and typical characteristics of main gold-bearing minerals in the study area were studied by means of optical microscopy,electron probe point analysis and isotope analysis.The results show that arsenicbearing pyrite can be divided into four generations:pyrite 1(Py1),pyrite 2(Py2),pyrite 3(Py3)and pyrite 4(Py4);arsenic-bearing pyrite is the main gold-bearing mineral in gold deposits,followed by arsenopyrite.The gold bearing pyrites in the study area have fine grain size and most pyrites have annulus structure.