关键词: 石英, 高温高压, 实验变形

Abstract: This paper describes the features of ineelastic deformation of Qianan quartzite, especially the formation process and the variation with increasing temperature and pressure.The study shows that increasing temperature and pressure is most favorable to the-transition of quartz from elastic to plastic component, which will greatly change the macrodeformation features. Once the transition of quartz reaches a certain amount, it will decrease the strength of quartzite and give rise to the instability.In order to explain the results of experiment, a series of empirical equations have been established for the P, T dependences of inelastic deformation and plastic component, for the relationship between plastic component and inelastic deformation, as well; as for the relation between the plastic component and the factor of released elastic energy.

Key words: Quartz, High temperature and high pressure, Experimental deformation