Equation of State Measurements on Molten Silicates

地球深部硅酸盐液体的形成和输送的热力学和运动学方面严重依赖于液体和固体组分的状态方程。目前，在非常高的压力下研究的液态硅酸盐组成范围太窄，无法在不包括许多相当推测的假设的情况下对岩石学理论进行定量评价。此外，液体状态方程的热部分几乎完全不受现有实验数据的约束。PI将使用芝加哥大学新的80毫米冲击波设备进行新的熔融硅酸盐压缩研究。将开发新的目标设计和仪器策略，以实现精度的数量级提高。这些变化将消除数据分析中的主观因素，并将极大地促进Hugoniot状态方程热部分的确定。

Thermodynamic and Kinematic aspects of the formation and transport of silicate liquids in the Earth's deep interior are critically dependent on the equations of state of both the liquid and solid components. The range of liquid silicate compositions that have been studied at significantly high pressures is currently too narrow to allow quantitative evaluation of petrologic theories without also including many rather speculative assumptions. Additionally, the thermal part of the liquid equations of state is almost completely unconstrained by existing experimental data. The PI will conduct new molten silicate compression studies using the new 80 mm shock wave facility at the University of Chicago. New target designs and instrumentation strategies will be developed to achieve an order of magnitude improvement in precision. These changes will eliminate subjective aspects of the data analysis, and will greatly facilitate the determination of the thermal part of the Hugoniot equation of state.