Experimental Investigation of Upper Mantle Processes to 9GPa: Initial Application of the Extended Range Piston Cylinder

活塞-气缸装置的全面重新设计， 使PI能够达到至少8 GPa的压力。 新 将通过在三个领域进行试验来利用这些能力： 1. Mg_2SiO_4-Fe_2SiO_4系统的精确相图 2.预测了Si和Si的场地环境， 硅酸盐液体中的A1作为压力的函数而变化。 的 扩展范围活塞缸能够达到 预测这些变化发生的压力， 并且可以通过MASS NMR分析运行产物。 这应该 大大提高了我们对岩浆粘度的理解， 密度 3.将校准两个著名的地质压力计， 在适当的压力范围内进行。 所有这些研究将增进我们对 地幔中的环境以及岩浆是如何在 地幔

A comprehensive redesign of the piston-cylinder apparatus has enabled the PI to reach pressures of at least 8 GPa. The new capabilities will be exploited by experiments in three areas: 1. An accurate phase diagram in the Mg2SiO4 - Fe2SiO4 system 2. It has been predicted that the site environment of Si and A1 in silicate liquids changes as a function of pressure. The extended range piston cylinder is capable of reaching the pressures at which these changes have been predicted to occur, and run products can be analyzed by MASS NMR. This should greatly improve our understanding of magma visosities and densities. 3. Calibration of two well-known geobarometers will be carried out in the appropriate pressure range. All of these studies will enhance our understanding of the environment in the mantle and of how magma is generated in the mantle.