ROW: An Experimental Investigation of the Effects of Fluorine in Interdiffusion in Feldspar

ROW：氟在长石中相互扩散影响的实验研究

• 批准号: 8817127
• 负责人: Eleanour Snow
• 金额: $ 6.11万
• 依托单位: University of Arizona
• 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: 1988-12-15 至 1991-09-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8817127&HistoricalAwards=false
• 关键词: ROW; Experimental; Investigation; Effects; Fluorine

The research addresses the effects of fluorine on alkali diffusion in alkali feldspar. It is expected that fluorine will substitute readily for oxygen in the feldspar structure disrupting the silicate framework and introducing vacancies in the cation istes, and will thereby increase the rate of alkali diffusion. Alkali diffusion will be studied over a temperature range of about 500-1000oC and pressures from 1 bar to 15 kilobars. Early experiments will be anhydrous, but water will be added later to check the combined effects of the two volatiles. Results will be analyzed by either electron microprobe or transmission electron microscopy, as appropriate, to determine the alkali diffusion rates. The isolated effects of temperature, pressure, and fluorine fugacity will be measured. The results will be applied to determination of the time required for specific geologic events to take place.

该研究探讨了氟对碱长石中碱扩散的影响。 预计氟将容易地取代长石结构中的氧，破坏硅酸盐骨架并在阳离子中引入空位，从而增加碱扩散速率。将在约 500-1000oC 的温度范围和 1 bar 至 15 kbar 的压力范围内研究碱扩散。 早期实验将是无水的，但稍后将添加水以检查两种挥发物的综合效果。 将酌情通过电子微探针或透射电子显微镜分析结果，以确定碱扩散速率。 将测量温度、压力和氟逸度的孤立影响。 结果将用于确定特定地质事件发生所需的时间。