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本文引述了按D. St?ffler分类的不同变质等级冲击变质岩中,石榴子石光性、X射线和化学研究的结果.指出对于初级变质的石榴子石,由于裂隙度增加,颜色和透明度就会发生变化.从第Ⅱ级开始,矿物成分发生变化.划分了与不同变质阶段有关的石榴子石改造的三种基本类型.冲击压缩是第一类的决定因素,冲击后的升温是第二类的决定因素,高温变质作用程度是第三类的决定因素.X射线研究表明,随着冲击作用增强、衍射线宽化而晶胞参数减小.这与石榴子石结构中类质同象的镁铁比值变化有关.
In this paper, the results of photochemical, X-ray and chemical studies of garnet in various metamorphic grade metamorphic rocks classified by D. Stöfler are presented. It is pointed out that for the primary metamorphic garnet, due to the increase of the fracture degree, the color and transparency Will change from the beginning of the second grade, the mineral composition changes, divided into different metamorphic stages of garnet transformation of the three basic types of impact compression is the first type of determinants, the impact of warming after the second Class determinants, the degree of high-temperature metamorphism is the third type of determinants.X-ray studies have shown that with the impact of enhanced diffraction line broadening and cell parameters decrease.This is similar to the garnet structure in the same type of image Of mafic iron ratio changes.