EPMA在固溶体分离矿物研究中的应用  

Application of EPMA on the Investigation of Exsolution Minerals

作　　者：毛水和[1] 

机构地区：[1]地矿部矿产综合利用研究所

出　　处：《电子显微学报》1989年第4期67-72,共6页Journal of Chinese Electron Microscopy Society

摘　　要：由于固溶体分离所形成的不同矿物相通常以细小的结晶相互相穿插交错,每种结晶相的粒度一般为几个微米,有的甚至小于一微米,因此很难用通常的矿物鉴定方法来研究固溶体分离矿物。电子探针的应用则使固溶体分离矿物的研究工作能比较有效地进行。利用二次电子图象或背散射电子图象或特征X射线图象可以将不同固溶体分离矿物相清楚地区别开来,然后通过电子探针定点定量分析即可得到空间分辨率约1μm^3的各种矿物相的化学成分数据。本文以铱铑钌矿及其基质矿物等轴铁铂矿,固溶体分离矿物体系——金铜矿和金银矿的研究为例子说明EPMA在固溶体分离矿物研究中的应用。The minerals formed in the exsolution proccess are usually very fine with the size of several microns sometimes even smaller than one micron, and often disperse and disseminate each other, so it is very difficult to study the exsolution minerals by usual means of mineral determination. With the help of EPMA and SEM,the exsolution minerals can be investigated effectively. By observing SEI or BEI or x-ray image of the speci-men, different mineral phases can be clearly discriminated, then the chemical composition of each mineral phase can be obtained by quantitative electron probe microanalysis with the speae resolution of about 1/~m3.The present paper deals with the study of iridrhodruthenium and its matrix mineral isoferroplatinum as well as exsolution mineral system-Au-Cu and Au-Ag minerals as examples to illustrate how EPMA is applied in the investigation of exsolution minerals.

关 键 词：电子探针 固溶体分离 矿物 鉴定 

分 类 号：P575.1[天文地球—矿物学]