阴极发光仪在变质岩和花岗岩类岩石中的应用

利用阴极发光仪对一些前寒武纪变质岩(河北,内蒙等地)和西藏及其它地区的后寒武变质岩,以及不同时代和成因的花岗岩类岩石的样品进行了观察。阴极发光与某些过渡元素的含量有关,可以揭示岩石的构造,间接地反映矿物化学成分的特点。本文介绍了阴极发光在变质岩和花岗岩类岩石的以下几个方面的应用:1) 间接地确定变质级;2) 揭示原岩的变余构造,3) 鉴别细粒和发光矿物;4) 研究矿物之间的反应;5) 重建变形构造。

Application of Cathodoluminescence to Metamorphic and Granitic Rocks

Certain samples, which are of pre-cambrian metamorphic rocks in China (Hebei Province and Inner Mongolia etc.), post-cambrian metamorphic rocks in Tibet and other areas, as well as granitic rocks with different ages and genesis, have been observed by means of CL (cathodoluminescence). CL related to certain concentrations of the transition elements, may reveal textures in rocks and show indirectly the characteristics of chemical composition of minerals. This paper deals with the application of CL to the studying of metamorphic and granitic rocks as follows; 1) determing metamorphic grade indirectly, 2) revealing the palimpsest structures of primary rocks, 3) identifying finegrained and luminescent mineral, 4) studying mineral reactions, 5)reconstructing deformationstructures.