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吉林通化地区板石沟——四方山一带广泛出露太古界龙岗群杨家店组变质岩系,因其经受了多次强烈的区域变质作用,致使原岩的结构、构造均已消失,难于恢复原岩。但赋存于变质岩中的付矿物锆石,在各种物理、化学作用和机械应力作用下,却具有相对稳定性。本文试图通过电镜扫描图片研究它的表面微结构特征,提供判断锆石所在岩石原岩性质的依据。一、斜长角闪岩中锆石电镜扫描特征据采自斜长角闪岩中10个锆石样品的统计(表1)从晶形来看,可分为浑圆状、半浑圆状和略有浑圆状锆石三种类型。它们均具有如下特征:
Due to its strong regional metamorphism, the Yangshidian metamorphic rocks in the Longgang Group in the Archeozoic have been widely exposed in the areas of the Yanshendian and Fangfanggou in the Tonghua area of Jilin Province. As a result, the structure and structure of the original rock have disappeared, Restore the original rock. However, the mineral zircons deposited in metamorphic rocks are relatively stable under various physical, chemical and mechanical stresses. This paper attempts to study its surface microstructure by scanning electron microscopy images to provide the basis for judging the nature of the original rock in which the zircon is located. I. CHARACTERISTICS OF Zircon Electron Microscopy Scanning from Amphibolite In accordance with the statistics of 10 zircon samples taken from plagioclase amphiboles (Table 1), from the crystal form, they can be classified as round, semi-turbid and slightly Round zircon three types. They all have the following characteristics: