福建武夷山脉中段五台—吕梁期变质作用与变质岩

Metamorphism of Wutai-Luliang Stage and Metamorphic Rocks in Wuyi Mountains,Fujian Province

闽赣交界武夷山脉中段里心—付坊地区, 奠基于古岛弧的天井坪组和上坪超单元,五台—吕梁期发生中压区域动力热流变质作用。角闪岩相变质岩主要为片岩、变粒岩夹长石石英岩及斜长角闪岩, 其次片麻状石英闪长岩、英云闪长岩等。角闪岩相变质后续有重熔型混合岩化。五台—吕梁期变质尾声又叠加区域动力变质作用。该区变质作用自始至终, 由于4 个世代不同样式叠加, 形成绚丽的构造景观。

The strata Tianjinping Formation and Shangping Superunit,located in the Lixin Fufang area of the middle Wuyi Mountains in the boundaries of Fujian and Jiangxi provinces,were formed in the paleoisland arc.A neutral pressure regional dynamothermal metamorphism took place in the Wutai Lulian Stage.The metamorphic rocks of amphibolite facies are mainly made up of schist and metaconglomerate with feldspar,quartz and plagioamphibolite,and then of gneissoid quartz diorite,greisen diorite and so on.It was found that the amphibolite facies metamorphism occurred before the remelting type migmatization and that the regional dynamometamorphism arose in the end of the Wutai Luliang Stage metamorphism.There occurred four different generations of metamorphism in the surveyed area,which was interlaced with each other from beginning to end.All these made the todays shape of the magnificent landscape in the area.