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辽西医巫闾山—关山地区，印支期板内碰撞过程相伴随的变形变质作用使太古代结晶基底发生绿片岩相退变质作用，与此同时，也使中元古沉积盖层岩石发生绿片岩相进变质作用。前者形成糜棱岩系组合，后者形成云母片岩—大理岩组合。控制这种变质作用双重性的直接原因是原岩的性质。对这种变质作用双重性的识别及其产物的研究不仅为变质作用期次的划分提供了一种新思路，而且为确定板内碰撞带地壳物质组成与结构提供了极为重要的证据，尤其对确定缺乏高压变质岩组合的碰撞带更为重要。
Metallurgical metamorphism and metamorphism of the Greenstone in the Archean crystalline basement occurred during the Indosinian process in the Wulalu Mountain-Guanshan area, western Liaoning Province. At the same time, metamorphic metamorphism occurred in the Proterozoic sedimentary caprock Metamorphism. The former forms a mylonite assemblage, the latter forming a mica schist-marble assemblage. The direct reason for controlling the duality of this metamorphism is the nature of the original rock. The identification of duality of this metamorphism and the study of its products not only provide a new way of dividing the period of metamorphism but also provide extremely important evidence for determining the composition and structure of crustal material in the collision zone plate, It is more important to identify the collision zone that lacks the high-pressure metamorphic rock combination.