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在对太行山阜平地区三条剪切带作了详细观察和测量的基础上,就斑晶旋转和眼球构造进行了塑性大变形的计算机模拟。计算结果表明:刚性的石榴石斑晶会随着基质的流动而产生旋转运动,旋转量的大小取决于剪切力的大小、斑晶的密集度以及斑晶在剪切带中的位置。长石眼球构造的形成主要是由长石与石英的韧性差决定的,塑性变形首先从斑晶的周围部分开始,逐渐向斑晶发展,脆性残斑核不断减小,这与剪切带内糜棱岩化强度分带相一致。
Based on the detailed observation and measurement of the three shear zones in the Fuping area of the Taihang Mountains, a computer simulation of large plastic deformation of the spinodal and eyeball structures was carried out. The calculated results show that the rigid garnet porphyrite will rotate with the flow of substrate. The amount of rotation depends on the magnitude of shear force, the density of the plaque and the position of the plaque in the shear band. The formation of feldspar eyeball structure is mainly determined by the poor toughness of feldspar and quartz. The plastic deformation begins with the peripheral part of the porphyry, gradually develops to the porphyry, and the brittle residual spot nucleus keeps decreasing, which is similar to the shear band Mylonitization intensity banding consistent.