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大学和布朗大学的联合研究项目，该项目旨在确定岩石中矿物在高压（高达100千巴）和高温（高达1200摄氏度）下的扩散特性。目的是评价在地幔和下地壳过程中达到化学和同位素平衡的程度；并扩展金刚石砧细胞的能力，允许在控制温度和压力下进行适度持续的实验。将建立模型，以预测高温高压下各种矿物中的扩散动力学。其他应用将用于地幔矿物学和化学模型；玄武岩成因;地幔化学输运；在地壳深处有非常高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.