石英显微变形机制及流变学特征研究进展

Research advances of microstructural deformation mechanism and rheological features of quartz

石英是组成地壳的主要矿物之一,其物理性质与地壳的变形行为及流变学属性密切相关,因此石英的显微变形机制及流变学特征研究意义重大。随着石英显微变形机制及流变学属性实验学研究的深入,我们对石英在地壳变形过程中重要作用的认识也随之提升。本文从石英结构入手,对升温过程中石英主滑移系的转换进行了总结,并且升温过程中显微变形机制也发生了改变,对流变学内涵也不同,所以分述了石英的主要变形机制,及其流变学参数;由于应变局部化为地壳变形的研究热点,并且石英对应变局部化具有一定的指示意义,所以本文对石英在应变局部化过程中的表现进行了深入讨论。考虑到地壳变形的研究过程中,石英不常作为单矿物发生变形,所以本文对多相矿物的变形表现也进行了讨论。最后我们将简单介绍一些现今主流的石英显微变形机制的研究手段。

Quartz is one of the main minerals that make up the crust.Its physical properties are closely related to the deformation behavior and rheological properties of the crust.Therefore,the study of the microscopic deformation mechanism and rheological characteristics of quartz is of great significance.The in-depth study of the microscopic deformation mechanism and rheological properties of quartz has enhanced our understanding of the important role of quartz in the deformation process of the earth’s crust.This paper starts with the quartz microstructure and summarizes the transformation of the quartz main slip system during the temperature raise.Due to the different deformation and temperature conditions,the microscopic deformation mechanism is quite different,and the rheological parameters changes.Therefore,the main deformation mechanism and its rheological parameters is described in detailed in this paper.Because strain localization is a research hotspot of crustal deformation,and the corresponding localization of quartz has certain indicating significance,this paper alsodiscussed the performance of quartz during strain localization.Considering the deformation of the earth’s crust,quartz does not often deform as a single mineral phase,so the deformation performance of mutiple phases minerals is also discussed.Finally,we also briefly introduce some current research methods for quartz microscopic deformation mechanism.