Use of Synchrotron Radiation to Study Mechanisms and Kinetics of Phase Transitions in Mantle Materials

该研究将研究高压和高温下地幔材料相变的机制和动力学，使用一种特殊的高压装置，设计用于在高压和高温下对样品施加可控的剪切应力。样品将通过光学显微镜、同步辐射高压高温下的原位x射线衍射、死后电子显微镜和微探针分析进行检查。在地幔过渡区内存在的压力和温度下，地幔物质的动态行为的实验信息对于理解深源地震的起源和性质是非常有价值的。

The study will investigate the mechanisms and kinetics of phase transitions in mantle materials at high pressures and temperatures using using a special high pressure apparatus designed to apply a controlled shear stress to the sample while at high pressure and temperature. The sample will be examined by optical microscope, in situ x-ray diffraction at high pressures and temperatures using synchrotron radiation, and post mortem electron microscope and microprobe analyses. Experimental information on the dynamic behavior of mantle materials at pressures and temperatures that exist within the transition zone of the mantle will be very valuable for understanding the origin and nature of deep focus earthquakes.