Acquisition of a Brillouin Spectrometer for Measurement of High-Pressure Elastic Properties of Earth Materials

这笔拨款为购买布里渊光谱系统的费用提供了部分支持，该系统用于直接测量上至下地幔压力和温度下金刚石砧细胞（DAC）中矿物的单晶弹性模量。这些测量是解释地幔成分、热结构和流变学的基础。此外，矿物弹性数据是矿物物理问题的基础，包括理解压力诱导非晶化现象和开发用于高压实验的绝对压力尺度。拟建的设施将产生关于矿物弹性特性和矿物组合在压力范围内的新数据，这些压力范围跨越了地球上至下地幔的一个重要过渡带，这对我们理解地幔动力学和解释地震数据至关重要。＊＊＊

9725453 Duffy This grant provides partial support of the costs of acquiring a Brillouin spectroscopy system for direct measurement of the single-crystal elastic moduli of minerals in diamond anvil cells (DAC) at upper to lower mantle pressures and temperatures. These measurements are fundamental to interpretation of the composition, thermal structure and rheology of the Earth's mantle. Additionally, mineral elasticity data are fundamental to problems in mineral physics including understanding the phenomenon of pressure induced amorphization and development of an absolute pressure scale for high pressure experimentation. The proposed facility will generated new data on the elastic properties of minerals and mineral assemblages at pressure ranges that span an important transition zone in the uppermost lower mantle of the Earth and which are fundamental to our understanding of mantle dynamics and to interpretation of seismic data. ***