Thermal Histories of Igneous and Metamorphic Rocks

火成岩和变质岩的热历史

• 批准号: 8720725
• 负责人: Bruno Giletti
• 金额: $ 11万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-01 至 1990-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8720725&HistoricalAwards=false
• 关键词: Thermal; Histories; Igneous; Metamorphic; Rocks

The PI has done pioneering work on isotope diffusion in geologic materials. He proposes to use knowledge of diffusion rates combined with measurements of Sr and O isotopic compositions to determine the cooling histories of rock units that have been studied by other means. A key goal is to compare results based on the two district isotopic systems. The basic concept is to date a variety of minerals having different temperatures of Sr isotopic closure to obtain cooling curves. Then comparison predicted vs. observed O isotopic compositions will provide an independent test of the cooling model. This work is innovative and has high potential for understanding diffusion processes and thermal histories of igneous and metamorphic rocks.

PI在地质同位素扩散方面做了开创性的工作 材料. 他建议将扩散率的知识 通过测量Sr和O同位素组成， 岩石单元的冷却历史已通过其他手段研究。 一个关键的目标是比较两个地区同位素的结果 系统. 基本概念是对各种矿物进行日期测定， 不同温度的Sr同位素封闭以获得冷却 曲线. 然后将预测的O同位素组成与观察到的O同位素组成进行比较 将提供冷却模型的独立测试。 这项工作是 具有创新性，并具有理解扩散过程的高潜力 以及火成岩和变质岩的热历史。