浅层位断裂带中的岩石流变

THE ROCK RHEOLOGY IN THE FAULT ZONE OF THE SHALLOW LEVEL

岩石流变学的研究不仅涉及到构造变形的物理特征,还关系到运动力学的成因机制,然而浅层位的固态流变却往往被忽视。本文以苏州东山倾滑断裂带为例,从岩石组构优选方位,应力矿物的晶体习性和位错构造的滑移运动进行微观测试研究,并从流动分异,变质分异和简单剪切作用对其形成机理进行了探讨。

A rheological study of the fault zone of the shallow level may concern not only the tectonophysical charactreristics of the deformation but also the genetic mechanism of the kinematics. In this paper authors try to explaning the rheology of solid state controlled by the simple shearing. in the shallow structural lecel taking a dip-slip fault at Suzhou Tongshan as an example. Seen from standpoint of the solid rheology the shallow level be-longs to the scale of a cataclastic rheology, and can occur the dynamic differentiation, metamorphic differentiation and the local penetrative structure as well. It should be empha-sized that the stress orientation of the flow shearing in the reverse fault zone of Suzhou Tongshan parallels to the move direction of the dipslip in this area, and the rock rheology might affect the dislocation forming of the different types.