研究超微金矿物的显微分析技术  

Microanalytic Techniques for Study on 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]武汉工业大学材料研究与测试中心

出　　处：《电子显微学报》1992年第2期125-130,共6页Journal of Chinese Electron Microscopy Society

摘　　要：本文应用EPMA、SEM/EDX及TEM/EDX对某地卡林型金矿中金的赋存状态进行了全面研究;讨论了这些分析技术的特点及所采取的分析措施。这些手段的联合运用,明确地揭示了所谓“不可见金”是由几纳米至几微米一系列不同粒级构成的被包裹于黄铁矿、含砷黄铁矿、粘土等载金矿物中的超微金粒,并在粘土中首次发现粒径小于50A的自然金颗粒。这为深入研究和揭示超微金的赋存状态提供了非常有意义的证据。The occurrence of ultramicro gold in certain carlin-type gold ore has been studied with EPMA, SEM/EDX, and TEM/EDX in this paper. The features of these analytical techniques and some measures taken to analyses the gold ore are discussed. Application of these combined techniques to study on gold occurrence successfully shows thatthe so-called 'invisible' gold is composed of a series ultramicro gold particles (about 500nm to a few/~m size) encap-sulated commonly in pyrite, arsenic pyrite and clay minerals ete. A 500nm in size ultramicro gold particle has beenobserved for the first time, and this provides the key knowledge for evaluating the gold occurrence.

关 键 词：载金矿物 超微粒金 电子显微分析术 

分 类 号：P618.51[天文地球—矿床学]