应用背散射电子象进行金矿鉴定的实验研究

Experimental Research on Identification of the Gold Mine With Backscatted Electron Image

利用广角背散射电子探头和X射线能谱仪相结合的方法,在扫描电镜上进行了金矿鉴定的实验研究。从金矿采集的试样中发现了该矿中金的三种存在形式,即自然金、银金矿和碲金矿,並分析了它们的含金量的百分比。研究结果表明,这种方法比较简捷,在确定金矿中金的存在形式及其生成环境方面,可为了解和研究金矿提供有意义的信息,可以和化学分析方法相结合,作为鉴定金矿的一种辅助手段。文中对本方法的优缺点及今后进一步的工作提出了自己的看法。

By combining the Robinson backscatted electron detector and the X-ray energy dispersive spectrometer, the experimental research work on the method for gold mine identification has been carried out on SEM, with samples acquired from Dong-ping gold mine. Three existing forms of gold in nature, i.e. the natural gold, the silver-gold and the tellurium-gold have been found, the percentage of the gold in these existing forms has been analysed. The experimental work suggests that this method for gold mine identification is simpler and faster than the che-mical analytical method in identifying existing forms of gold and its growing enviroment, provi-ding useful information for understanding and investigating the gold mine. This method can be combined with the chemical analytical method as a complementary means in this field. The advantages and the shor points of this method, and its further research work, have been poin-ted out.