用磁化率各向异性研究构造变形的几个问题

SOME PROBLEMS IN APPLICATION OF ANISOTROPY OF SUSCEPTIBILITY TO STRUCTURAL DEFORMATION ANALYSIS

本文讨论了用磁化率各向异性研究构造变形时应注意的几个问题。介绍用磁化率各向异性研究岩石变形的限制条件、待解决的问题及应用前景。同时提出了地质历史时期岩石脆性破裂前的塑性变形可能会引起磁化率各向异性的变化及岩石中不同期次、不同种类的磁性矿物的共存可能是影响磁化率椭球与应变椭球对应关系的一个重要因素的观点。

From the experience of using AMS in structural deformation analysis, the authors found that there are some problems in this method. The authors point out that the plastic deformation before the brittle rupture of rocks in the geological time may influence the AMS in the rocks, and the superposition of the different kinds of magnetic minerals may be the main factor to influence the mathematical relationship between the AMS ellipsoid and strain ellipsoid. In order to use the method correctly, we should do some experiments to improve it and pay attention to the restrictions of the method.