超显微金矿物的电子显微分析  

Electron Microscopic Analysis of Ultramicro Gold Minerals

作　　者：叶先贤[1] 孙振亚[1] 陈仝 尹京武[1] 张乃枝[1] 

机构地区：[1]武汉工业大学测试中心

出　　处：《武汉工业大学学报》1992年第2期32-36,共5页

摘　　要：本文应用EPMA、SEM/EDX,TEM/EDX等分析技术对卡林型金矿中超微金的赋存状态进行了研究,并对这些分析技术及其对金矿的测量方法的特点进行了讨论。通过对金赋存状态的电子显微分析,揭示出所谓“不可见金”是由一系列超微金颗粒(大约3mm至几μm)所组成,它们被包裹于黄铁矿、含砷黄铁矿中,并首次观察到3nm的超微金矿物,这为人们正确评价超微金的赋存状态提供了重要依据。The occurrence of ultramicro gold in certain carlin-type gold ore has been studied bymeans of EPMA, SEM/EDX and STEM/EDX in this paper. The features of these analytical tech-niques and some measures taken to analysing the gold ore are discussed. Application of this combinedtechniques to study on gold occurrence successfully shows that the so-called 'invisible' gold is com-posed of a series of ultramicro gold particles (about 3nm to a few um in size) encapsulated common-ly in pyrite, arsenic pyrite and clay minerals etc. A 3nm in size ultramicro gold particle has beenobserved for the first time, and that provides the key knowledge for evaluating the gold occurrence.

关 键 词：超显微金 电子显微分析 矿物 

分 类 号：P575.2[天文地球—矿物学]