Experimental and Theoretical Study of Element Partitioning Among Brine, Vapor and Melt

盐水、蒸气和熔体元素分配的实验和理论研究

• 批准号: 9506631
• 负责人: Philip Candela
• 金额: $ 19.5万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9506631&HistoricalAwards=false
• 关键词: Experimental; Theoretical; Study; Element; Partitioning

9506631 Candela The P.I.s will obtain experimental data and construct models that bear on problems of geothermal energy systems, volcanic hazards, volcanic inputs to the atmosphere, and exploration for mineral deposits. In the first, and most extensive part of this research endeavor, experiments will be performed on the partitioning of many elements, between melt, brine, vapor, and crystals, covering a range of melt compositions, temperatures, oxygen fugacities and pressures at and below 1 kilobar. In the second part, the P.I.s will completely redo their magmatic devolatilization model to account for the effects of a percolation model on the chemistry of devolatilized vapor+brine, and account for the new equilibria that have been collected by our lab and by other workers. The third part of the proposed research will study the observable effects of volatile exsolution on hydrous minerals, and on textures of the associated granitic rocks. Detailed mineralogy, geochemistry and petrography (micro- and marcroscopic) will be conbined with, and interpreted in light of , the results of modeling and experimental efforts outlined above.

P.I.s将获得实验数据并构建模型，以解决地热能源系统、火山灾害、火山对大气的输入以及矿藏勘探等问题。在这项研究工作的第一部分，也是最广泛的一部分，将对许多元素在熔体、盐水、蒸汽和晶体之间的分配进行实验，涵盖一系列熔体成分、温度、氧逸度和在1千巴及以下的压力。在第二部分，P.I.s将完全重做他们的岩浆脱挥发模型，以解释渗透模型对脱挥发蒸汽+盐水化学的影响，并解释我们实验室和其他工作人员收集的新平衡。第三部分将研究挥发性溶出对含水矿物和伴生花岗质岩石结构的可观测影响。详细的矿物学、地球化学和岩石学（微观和宏观）将与上述建模和实验工作的结果相结合，并根据这些结果进行解释。