Experimental Investigation of Phase Equilibria in Calc-Alkaline Magmas with C-O-H Fluid: Applications to (1) Mt. St. Helens and (2) Fish Canyon Tuff

C-O-H 流体钙碱性岩浆相平衡的实验研究：在 (1) 圣海伦斯山和 (2) 鱼峡谷凝灰岩中的应用

• 批准号: 8708604
• 负责人: Malcolm Rutherford
• 金额: $ 18.29万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-15 至 1991-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8708604&HistoricalAwards=false
• 关键词: Experimental; Investigation; Phase; Equilibria; Calc

This project involves detailed experimental studies of crystal- fluid-melt equilibria for natural melt compositions in equilibrium with C-O-H fluids. Specific objectives of the project include the determination of mineral-melt-vapor relationships for a Mt St Helens andesite and for the Fish Canyon (Colorado) tuff and the development of these and other phase equilibrium data for use as geothermometers, geobarometers, and geohydrometers. The results of these studies will enhance our understanding of the evolution and behavior of volatile-rich calc-alkaline magmas. These data are essential to our understanding of eruptive cycles of explosive volcanos such as Mt St Helens.

本项目涉及晶体-流体-熔体平衡的详细实验研究，用于与C-O-H流体平衡的天然熔体成分。该项目的具体目标包括确定St Helens山安山岩和Fish Canyon （Colorado）凝灰岩的矿物-熔体-蒸汽关系，并开发这些和其他相平衡数据，用于地温计、地球气压计和地质比重计。这些研究结果将增强我们对富挥发物钙碱性岩浆演化和行为的认识。这些数据对我们了解像圣海伦斯火山这样的火山爆发周期至关重要。