伊敏五牧场区存在着从褐煤到贫煤完整的变质系列，其主要煤变质类型为接触变质。

There is a complete metamorphic series of coal from lignite to meager coal in Wumuchang area, Yimin, the main metamorphism type is contact metamorphism of coal.

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超高压变质岩是识别岩石圈收缩引起的一系列地质事件最有效的标志。

Such rocks is considered to be the most effective indicator to identify a series of geological events due to lithosphere compression.

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