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本文利用超高压透射电子显微镜对在相当于角闪岩相条件下天然变形的微斜长石进行了初步研究。研究发现,光学显微镜下看到的一组平行细纹不是出浴条纹,而是变形条带。另一种超显微构造——滑动小叶片见于变形条带邻区,它们和另一相矿物出港或沉淀形成的小叶片不同,是由矿物的变形造成的。变形条带、滑动小叶片以及比较常见的堆垛层错都相互平行,看来都是由分位错沿同一类型的滑移面运动形成的。
In this paper, ultrahigh-pressure transmission electron microscopy was used to study the natural deformation of micro-plagioclase in the amphibolite facies. The study found that a group of parallel fine lines seen under a light microscope were not bathing stripes, but rather deformed bands. Another type of super-microstructure-sliding small vane is found in the vicinity of the deformed zones. They are different from the small leaves formed by the exit or sedimentation of another phase mineral and are caused by the deformation of the mineral. The deformed strips, gliding lobes and the more common stacking faults are all parallel to each other and appear to be formed by the movement of dislocations along the same type of slip plane.