Thermal Histories of Igneous and Metamorphic Rocks

该研究所在地质材料中的同位素扩散方面做了开创性的工作。他建议使用扩散速率的知识结合锶和氧同位素组成的测量来确定已用其他方法研究的岩石单元的冷却历史。一个关键目标是比较基于两个地区同位素系统的结果。其基本概念是对具有不同锶同位素闭合温度的各种矿物进行测年，以获得冷却曲线。然后，将预测的氧同位素组成与观测的氧同位素组成进行比较，将提供对冷却模型的独立测试。这项工作具有创新性，对了解火成岩和变质岩的扩散过程和热历史具有很高的潜力。

The PI has done pioneering work on isotope diffusion in geologic materials. He proposes to use knowledge of diffusion rates combined with measurements of Sr and O isotopic compositions to determine the cooling histories of rock units that have been studied by other means. A key goal is to compare results based on the two district isotopic systems. The basic concept is to date a variety of minerals having different temperatures of Sr isotopic closure to obtain cooling curves. Then comparison predicted vs. observed O isotopic compositions will provide an independent test of the cooling model. This work is innovative and has high potential for understanding diffusion processes and thermal histories of igneous and metamorphic rocks.