冀东金厂峪金矿黄铁矿矿物特征研究

Characteristics of Pyrit in Jinchanyu Gold Deposit of Eastern Hebei Province

黄铁矿是金厂峪金矿主要的载金矿物,通过野外调查取样、显微镜观察和电子探针分析对其进行研究。根据金厂峪矿床野外产出的地质特征、矿脉间的穿插关系以及矿物共生组合特征,将矿床的成矿阶段划分为钠长石—石英阶段、石英—硫化物阶段、石英大脉和石英—碳酸盐四个阶段,并逐步分析各个阶段黄铁矿的特征。自然金产出于钠长石—石英阶段、石英—硫化物阶段的它形晶黄铁矿颗粒中。通过黄铁矿的化学成分分析,其矿床成因为岩浆热液型金矿床,成矿深度为中深部。

Pyrite is the main gold bearing minerals of Jinchanyu, Through field investigation and sampling, microscope and EPMA analysis of its research. According to the geological features, field output vein penetration relationship and mineral paragenesis characteristics, will be divided into four stages of mineralization of the ore deposit is albite-quartz stage, quartz-sulfide stage, quartz vein and quartz- carbonate stage, each stage characteristic and gradually analysis of pyrite. Native gold production for albite-quartz stage, quartz-sulfide stage of the anhedral crystal pyrite particles. Through the analysis of the chemical composition of pyrite, genesis of the deposit belongs to magmatic hydrothermal type, metallogenic depth is medium-deep.