Experimental Investigation of Sulfur Solubility in Silicate Melts

KressEAR-0229871这项研究将校准硅酸盐熔体中硫的热力学模型，它是温度、压力、氧逸度、硫逸度和整体熔体组成的函数。由此产生的模型将适用于火成岩岩石学、火山学、岩浆矿床成因、行星地质学和冶金学等一系列问题。将进行两类实验。第一组将研究在超液相线温度下受控硫气氛中的各种硅酸盐熔体组成，以校准硫的热力学模型。结果将被用来将硫纳入Ghiorso和Sack(1995)的熔体模型。第二组实验将测定O-S-Fe-Ni-Cu体系中硫化物液体组分的偏摩尔体积。这些实验将使用一种改进的单鲍勃阿基米德方法来测量密度。结果将被用于校准加压下硅酸盐液体中硫的模型。

KressEAR-0229871This study will calibrate a thermodynamic model for sulfur in silicate melts as a function of temperature, pressure, oxygen fugacity, sulfur fugacity and bulk melt composition. The resulting model will be applicable to a wide range of problems in igneous petrology, volcanology, magmatic ore genesis, planetary geology, and metallurgy. Two categories of experiments will be performed. The first set will study a variety of silicate melt compositions in a controlled sulfur atmosphere at super-liquidus temperatures to calibrate a thermodynamic model for sulfur. Results will be used to incorporate sulfur into Ghiorso and Sack's (1995) MELTS model. A second set of experiments will determine the partial molar volumes of sulfide liquid components in the system O-S-Fe-Ni-Cu. These experiments will employ a modified single-bob Archimedian method to measure density. Results will be used to calibrate a model for sulfur in silicate liquids at pressure.