Rates and Mechanisms of Metamorphism from 3-D Quantitative Textural Analysis Using Computed X-ray Tomography

使用计算机 X 射线断层扫描进行 3D 定量结构分析的变质速率和机制

• 批准号: 9417764
• 负责人: William Carlson
• 金额: $ 18.2万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-01 至 1999-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417764&HistoricalAwards=false
• 关键词: Rates; Mechanisms; Metamorphism; Quantitative; Textural

9417764 Carlson This project will apply the novel technology of high- resolution computed X-ray tomography to the quantitative analysis of metamorphic textures, with the aim of identifying mechanisms of metamorphic reactions and quantifying their rates. High resolution and ultra-high- resolution X-ray tomographic imagery of porphyroblastic and non-porphyroblastic rocks will be digitally processedp and analyzed to gather comprehensive data on the spatial disposition and size distribution of crystals. Successful completion of this project will permit calculation of actual rates of fundamental metamorphic processes including rates of crystal growth. Knowledge of crystal growth rates will ultimately lead to a more precise quantification of P-T-time paths, better constrained rates of tectonometamorphic processes, and estimates from textural data of rates of heating and influx of chemically reactive fluids in appropriate metamorphic rocks.

这个项目将应用高分辨率计算机x射线断层扫描的新技术对变质结构进行定量分析，目的是确定变质反应的机制并量化其速率。对卟啉岩和非卟啉岩的高分辨率和超高分辨率x射线层析成像进行数字处理和分析，以收集有关晶体空间分布和尺寸分布的综合数据。这个项目的成功完成将允许计算基本变质过程的实际速率，包括晶体生长速率。对晶体生长速率的了解最终将导致更精确的p -t时间路径的量化，更好地限制构造变质过程的速率，并从结构数据中估计加热速率和适当变质岩石中化学反应流体的流入。