论文部分内容阅读
根据太古宙地壳在后寒武纪被改造的特点,可以将研究区──阜新地区划分为西部稳定区和东部线性杂岩带。而西部稳定区又可依据变质作用强度进一步划分为西部麻粒岩相区和东部用闪岩相区。本文通过西部麻粒岩相区和东部角闪岩相区岩石组合特征、变质作用演化的动力学以及发育于其中的韧性剪切带运动学、动力学和地球物理学特征的对比研究,确定麻粒岩相区为历闪岩相区的根部带,后期构造运动的右行拉伸作用,使上部的角闪岩相区与下部的麻粒岩相区发生分离,而后一起抬升剥蚀,从而处于平行位置。
According to the characteristics of the remnant Archean crust being remodeled in the Late Cambrian, the study area-Fuxin area can be divided into the western stable zone and the eastern linear complex belt. The stability zone in the west can be further divided into the western granuloid facies and the eastern amphibolite facies according to the intensity of metamorphism. Based on the characteristics of the rock assemblages in the granulite facies and the amphibolite facies in the west, the dynamics of the metamorphism and the kinematics, dynamics and geophysical characteristics of ductile shear zones developed in the study, The granulite facies is the root zone of the metamorphic facies, and the right-lateral extensional tectonic movement in the late stage separates the upper amphibolite facies from the lower granulite facies and then elevates the denudation, Parallel position.