Texture, mineral associations and metamorphic reactions of the Archean high-grade metamorphic rocks in East Hebei reflect that their metamorphic evolution has experienced four stages: prepeak, peak, postpeak and retrograde metamorphisms. 冀东太古宙麻粒岩相变质岩石的结构、矿物组合和反应关系反映了其变质作用经历了峰前、峰期、峰后和退化变质四个阶段。
With temperature decreasing, the height of prepeak is increasing gradually, which shows that the size of atomic clusters is getting bigger. 随着温度的降低,预峰的高度逐渐增大,说明体系中原子团簇尺寸越来越大。
At 400 ℃, several compounds have been formed at the position of the prepeak. 400℃时,在预峰消失的位置形成多种化合物相。
Most of Fe atoms exist in the Al-Fe-Ce clusters corresponding to the prepeak, and most of Ce atoms are randomly distributed in Al amorphous matrix. Fe原子大部分存在于预峰所对应的Al-Fe-Ce原子团簇中,而Ce原子大部分无规分布于Al非晶基体中。