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通过研究和总结内蒙古大青山兴和岩群变质岩石类型、矿物共生组合及特征矿物等方面的特点及规律,对兴和岩群变质作用期次进行划分,分为四个阶段:1、峰期前变质阶段,2、峰期变质阶段,3、近等压冷却阶段,4、峰期后降温降压阶段。同时对兴和岩群麻粒岩变质P-T-t轨迹的进行研究,结果表明中太古麻粒岩相变质过程为从基性-中性-酸性的变化特征。
By studying and summarizing the characteristics and rules of the metamorphic rocks, the symbiosis of minerals and the characteristic minerals in the Xinghe Group in the Daqingshan, Inner Mongolia, the metamorphism of the Xinghe Group is divided into four stages: 1, the peak period The former metamorphic stage, 2, peak metamorphism stage, 3, nearly equal pressure cooling stage, 4, after the peak phase of cooling and depressurization. At the same time, the metamorphic P-T-t trajectory of granulite in Xinghe Group was studied. The results show that the process of granulite facies metamorphism is a basic-neutral-acidic change.