弱片理化石英砂岩构造微区特征

采自韧性剪切带外侧的弱片理化石英砂岩不同构造微区特征,显示岩石的片理化受到多方面因素的制约和影响,如岩石中砂粒的含量和砂粒的粒度。片理化过程砂粒有旋转和拉伸变形,粒度较小的颗粒优先旋转并有较大的拉伸应变量,颗粒粒度敏感变形机制是该岩石的主要变形机制。 

CHARACTERISTICS OF TECTONIC MICRODOMAINS OF A WEAKLY CLEAVED QUARTZ SANDSTONE

The difference between tectonic microdomains of a weakly cleaved quartz sandstone collected from the outer margin of a ductile shear zone shows that the development of cleavage in the rock depends on many factors, such asthe content and the size of sands, there will occur rotations and stretching of the sand grains during the formation of cleavage with a greater stretching and an earlier rotation for smaller grains.Grain-size sensitive deformation was the operative deformation mechanism.