Effects of High Pressure on the Kinetics of Grain-Growth and Dislocation Recovery in Olivine and Modified Spinel

高压对橄榄石和改性尖晶石晶粒长大和位错恢复动力学的影响

• 批准号: 9017811
• 负责人: Shun-ichiro Karato
• 金额: $ 11.1万
• 依托单位: University of Minnesota-Twin Cities
• 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: 1991-05-01 至 1993-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9017811&HistoricalAwards=false
• 关键词: Effects; Pressure; Kinetics; Grain; Growth

The goal of this project is to understand the effects of high pressure on grain-growth in fine-grained olivine and B-phase aggregates and on dislocation recovery in olivine by the static annealing at high temperatures using the multiple anvil high pressure apparatus. This study will yield the first data set on the kinetics of grain-growth and dislocation recovery at very high pressure under well-controlled chemical environments. The results have important applications in a wide range of geological problems, including the evaluation of annealing effects in paleopiezometers, the evaluation of the effects of transformation superplasticity, and the creep mechanisms and the mechanisms of dynamic recrystallization in these minerals.

本项目的目的是了解高压对细粒橄榄石和B相聚集体中的颗粒生长和橄榄石中的位错回复的影响，并利用多重顶锤高压装置在高温下进行静态热处理。这项研究将提供第一组关于在可控化学环境下在很高压力下的晶粒生长和位错恢复动力学的数据集。这些结果在广泛的地质问题中有重要的应用，包括评价古地层中的退火效应，评价相变超塑性的效应，以及这些矿物的蠕变机制和动态再结晶机制。