运动学涡度和极摩尔圆的基本原理与应用

运动学涡度是岩石递进变形中非同性的一种量度，利用其对韧性剪切带进行应变分解，确定剪切作用类型是当今构造地质学研究的较新课题。极摩尔圆同时适用共轴和非共为形，是应变分析的一种有利工具，并特别适用于从应变测量数据求取运动学涡度；从力学理论角度对运动学涡度进行了系统而简明的论述，地极摩尔圆的原理进行了推导，提出了它们在韧性剪切带应变分析中的应用。

BASIC PRINCIPLES AND APPLICATIONS OF KINEMA TIC VORTICITY AND POLAR MOHR DIAGRAM

Kinematic vorticity is a measurement of the non coaxiality in progressive deformation. With this theory, decomposing the strain in a ductile shear zone and defining the shearing type which formed the shear zone are new subjects for structural geology. The polar Mohr diagram is suitable for both coaxial and non coaxial deformation and, therefore, is a powerful tool for strain analysis. It is especially useful for obtaining the kinematic vorticity from the measured strain data of a general shear zone. This paper, briefly and systematically, discribes the theory of kinematic vorticity, deduces the principle of polar Mohr diagram and sets forth their applications.