Experimental Geochemistry of Rock-Forming Minerals and Assemblages

首席调查员将继续一项研究造岩矿物和矿物组合的基本物理化学性质的计划。他将测量端员硅酸盐的自由能和生成热，固溶体系列中混合的自由能和热，重要成岩矿物组合的相互稳定性，以及熔融的稳定性(特别是在混合挥发性大气和蒸汽不饱和条件下)。使用的方法包括氧化物熔体溶液量热法、实验确定的相平衡的位移、阳离子交换平衡的测定以及水和其他溶解度的测量。这项研究将大大增加重要造岩矿物的热力学和相平衡方面的数据库，并有助于更好地了解矿物-矿物和矿物-液体平衡。这些数据对地质学家来说至关重要，他们使用矿物和矿物组合来确定地球内部某些岩石形成的条件。

The principal investigator will continue a program to investigate the fundamental physicochemical properties of rock-forming minerals and mineral assemblages. He will measure free energies and enthalpies of formation of end-member silicates, free energies and enthalpies of mixing in solid solution series, mutual stabilities of important rock-forming mineral assemblages, and stabilities with respect to melting (especially under mixed volatile atmosphere, vapor-undersaturated conditions). Methods to be utilized include oxide melt solution calorimetry, displacement of experimentally determined phase equilibria, determination of cation-exchange equilibria, and both aqueous and other solubility measurements. This research should add significantly to the data base for important rock-forming minerals, both in thermodynamic and phase equilibrium terms, and lead to a better understanding of both mineral-mineral and mineral-liquid equilibria. These data are critical to geologists who use minerals and mineral assemblages to determine the conditions within the earth under which certain rocks form.