Oxygen and Hydrogen Isotope Studies of Igneous and Metamorphic Rocks and Associated Hydrothermal Alteration

火成岩和变质岩及相关热液蚀变的氧和氢同位素研究

• 批准号: 9019190
• 负责人: Hugh Taylor
• 金额: $ 51.9万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-15 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9019190&HistoricalAwards=false
• 关键词: Oxygen; Hydrogen; Isotope; Studies; Igneous

The principal investigator will develop a new stable isotope mass spectrometer capable of measuring oxygen isotope ratios of very small samples. An on-line capability for analyzing tiny silicate and oxide mineral samples, using a new laser fluorination technique, also will be developed. The latter will lead to a study of detailed exchange behavior of aqueous fluids with minerals and volcanic glasses. Additionally, studies will be conducted on isotopic variations in several specific rift-zone environments where enhanced fracture permeability allows deep circulation of surface waters. Investigations also will take place to better understand the isotope geochemistry of the continental crust and upper mantle.

首席研究人员将开发一种新的稳定同位素质谱仪，能够测量非常小样本的氧同位素比率。还将开发一种在线分析微小硅酸盐和氧化物矿物样品的能力，使用一种新的激光氟化技术。后者将导致研究水中流体与矿物和火山玻璃的详细交换行为。此外，还将对几个特定裂谷区环境中的同位素变化进行研究，在这些环境中，裂缝渗透性的增强允许地表水的深层循环。还将进行调查，以更好地了解大陆地壳和上地幔的同位素地球化学。