Phase Equilibria and Speciation of Water and Carbon Dioxide in Silicate Melts

这个正在进行的项目旨在研究 水和二氧化碳（最丰富的挥发性 地球火成岩中的组分）， 天然火成岩系统 这些组件具有重要的 对硅酸盐熔体行为的影响， 是理解岩浆的基础 起源和进化 拟议的工作涉及 实验岩石学和分析应用 测量H2O和CO2总体浓度的技术 以及含氢和含碳的 在合成和天然玻璃中。 具体 需要解决的问题包括： 高压下的硅酸盐熔体和玻璃 水蒸气和硅酸盐熔体之间的分馏.测量 天然火山的H2O和CO2浓度 玻璃.单个气泡的H2O/CO2比的测量 在火山玻璃;和实验研究的 水对地幔部分熔融程度的影响 橄榄岩

This ongoing project is designed to examine the behavior of water and carbon dioxide (the most abundant volatile components in terrestrial igneous rocks) in model and natural igneous systems. These components have significant effects on the behavior of silicate melts, and a knowledge of these effects is fundamental to understanding magma origin and evolution. The proposed work involves application of experimental petrology and analytical techniques to measure the bulk concentrations of H2O and CO2 and the concentrations of individual H- and C- bearing species in synthetic and natural glasses. The specific problems to be addressed include: mixed volatiles in silicate melts and glasses at elevated pressures; 13C/12C fractionation between vapor and silicate melts; measurement of the H2O and CO2 concentrations of natural volcanic glasses; measurement of H2O/CO2 ratios of individual bubbles in volcanic glasses; and experimental investigation of the effect of water on the degree of partial melting of mantle peridotite.