Diffusion Kinetics Measurements of Very High Temperatures and Pressures; Applications to Upper Mantle and Lower Crustal Processes

该提案概述了康奈尔-布朗大学联合 研究项目，以确定扩散性能的 岩石中的矿物在高压下（高达100千巴）， 温度（高达1200 oC）。 目标是评估 达到化学和同位素平衡的程度 在地幔和下地壳过程中;并延长 金刚石砧座允许中等持续时间的能力 在受控温度和压力下进行实验。 模型 将开发，以预测扩散动力学， 在高温和高压下的各种矿物质。 其他 应用于地幔矿物学和化学模型; 玄武岩成因;地幔化学输运;极高品位 地壳深部的变质作用和熔融作用。

This proposal outlined a joint Cornell-Brown Universities research project to determine the diffusion properties of minerals in rocks at high pressures (up to 100 kbar) and temperatures (up to 1200oC). The objectives are to assess the degree to which chemical and isotopic equilibrium are attained during mantle and lower crustal processes; and to extend the capabilities of diamond anvil cells to permit moderate duration experiments under controlled temperature and pressure. Models will be developed in order to predict diffusion kinetics in various minerals at high temperature and pressures. Other applications will to models of mantle mineralogy and chemistry; basalt genesis; mantle chemical transport; and very high grade metamorphism and melting in deep crustal regions.