Properties of Earth Materials at High Pressure and Temperatures

新技术和现有技术的组合将 可以用来研究地幔和地核的性质 材料. 该研究将包括两个一般领域的高 压力/温度研究：1）强度的测量 地幔材料在高压和高温下使用金刚石 对顶砧室和同步辐射，2）相位研究 MgSiO 3、MgO和铁在极高温度下的转变和熔化 激光加热和同步加速器的压力和温度 辐射 我们对地幔动力学的理解， 特别是深源地震的起源取决于我们的知识 相变的机制和动力学， 压力/温度条件下各相的强度 地球的地幔。 我们对温度的理解 地幔和地核的分布和组成取决于我们的 对重要地幔和地核熔融温度的认识 材料.

New techniques and combinations of existing techniques will be used in our studies of the properties of mantle and core materials. The research will consist of two general areas of high pressure/temperature research: 1) the measurement of strength of mantle materials at high pressures and temperatures using diamond anvil cells and synchrotron radiation, 2) study of phase transitions and melting in MgSiO3, MgO and iron at very high pressures and temperatures by laser heating and synchrotron radiation. Our understanding of the dynamics of the mantle and especially the origin of deep earthquakes depends on our knowledge of the mechanisms and kinetics of phase transitions and the strength of various phases at the pressure/temperature conditions of the Earth's mantle. Our understanding of the temperature distribution and composition of the mantle and core depends on our knowledge of the melting temperatures of important mantle and core materials.