高温高压下辉石弹性及相变研究进展

辉石(pyroxene)是地壳中重要的造岩矿物,同时也是上地幔中除橄榄石以外含量最多的矿物,对其弹性及相变的研究有助于更好的理解壳幔的物质组成、地震波速异常及动力学过程等.高温高压实验和理论模拟计算是目前探测地球深部物质物性的两种最有效的间接方法,因此本文在介绍了辉石矿物学特征的基础上,从实验和计算两个方面论述了近十几年来国内外学者对辉石的弹性及相变的研究进展,然后探讨了辉石相变与上地幔X不连续面的关系,最后指出了目前的研究存在的问题以及未来的研究展望.

Progress in elastic properties and phase transitions of pyroxene under high pressure and high temperature conditions

Pyroxene is important rock-forming mineral in the Earth’s crust,and widely believed to be the most abundant mineral except olivine in the Earth’s upper mantle.The study of its elastic properties and phase transitions is helpful to better understanding the composition of the crust and mantle,seismic wave velocity anomaly and dynamic process.High pressure and high temperature experiments and theoretical simulation calculations are the two most effective indirect methods at present to explore Earth’s deep physical properties.In this paper,the mineralogical characteristics of pyroxene are first introduced.Then,the progress of the research on the elastic properties and phase transitions of pyroxene in recent ten years is reviewed from the two aspects of experiment and calculation,and the relationship between pyroxene phase transition and X discontinuity of upper mantle is also discussed.Finally,this paper points out the existing problems in the research and the prospect of future research.