应用显微构造确定古差应力值的研究现状及基本方法

Research Status and Basic Methods of Determining Paleodifferential Stress Values by Microstructures

近年来,应用显微构造在变形的运动学和动力学分析方面发挥了重要作用。通过观察和分析岩石中的微观结构,可以揭示岩石的变形方式和变形速率,进而推断出变形过程中的动力学机制。通过观察岩石中的微观结构,可以推断出岩石所受到的应力状态,并通过测量和分析岩石中的变形特征,可以估计出岩石的应变情况。通过观察岩石中的显微结构和矿物组合,可以推断出岩石变形时所处的温度范围,这对于理解地壳的热力学演化具有重要意义。所谓动力学就是探索构造形变与应力状态之间的关系,目前,利用显微构造进行动力学分析主要包括应力方位及应力大小的估算,这一方面也积累了十分丰富的资料。本文将在前人总结的基础上,根据在不同地域中的韧性剪切带的特征及变形环境来探讨在显微构造中确定古差应力值的基本方法。

In recent years, applied microstructures have played an important role in the kinematic and dy-namic analysis of deformation. By observing and analyzing the microstructure in the rock, the deformation mode and deformation rate of the rock can be revealed, and the dynamic mechanism in the deformation process can be inferred. By observing the microstructure in the rock, the stress state subjected to the rock can be inferred, and by measuring and analyzing the deformation characteristics in the rock, the strain of the rock can be estimated. By looking at the microscopic structure and mineral assemblages in the rock, the temperature range at which the rock deforms can be inferred, which has important implications for understanding the thermodynamic evolution of the crust. The so-called dynamics is to explore the relationship between structural deformation and stress state. At present, the dynamic analysis using microstructures mainly includes the estimation of stress orientation and stress magnitude, which has accumulated very rich data. On the basis of the previous summary, this paper will discuss the basic method to determine the paleodifferential stress value in the microscopic structure according to the characteristics of the ductile shear zone and the deformation environment in different regions.