Presidential Young Investigator: Metamorphic Petrology ,

构造作用与变质作用关系的研究是当前地壳研究中最活跃、最激动人心的领域之一。由于新技术的发展，PI对这些技术的发展做出了贡献，现在可以追踪特定矿物组合的压力(P)-温度(T)路径，因为它们受到埋藏、加热、压缩、脱水、断层作用、隆起和侵蚀。地质年代学技术在这些岩石上的应用使推断P-T时间路径成为可能，并为建立精确的地壳过程地球物理模型提供了可能。PI将在PYIA期间进行构造和变质作用的研究，但也将研究高压低温变质过程中流体不混溶的可能作用。实地研究将在三个地区进行：(1)奥地利东部阿尔卑斯山；(2)美国爱达荷州中西部；(3)爱琴海西夫诺斯岛。实验室工作将主要在哈佛大学进行，在那里将使用电子探针分析器从矿物组合确定P-T路径，并将使用加热/冷冻显微镜阶段来评估流体不混溶的条件。地质年代学工作将是40Ar/39Ar类型的，并将在未指明身份的实验室进行。

The study of the relationships between tectonic processes and metamorphism is one of the most active and exciting areas of current research on the Earth's crust. Thanks to new techniques, to whose development the PI contributed, it is now possible to track the pressure (P) - temperature (T) path of specific assemblages of minerals as they are subjected to burial, heating, compression, dehydration, faulting, uplift, and erosion. The application of geochronologic techniques to the same rocks makes it possible to deduce P-T time paths and opens the possibility of building accurate geophysical models of crustal processes. The PI will conduct research on tectonics and metamorphism during the duration of the PYIA but, also, will study the possible role of fluid immiscibility during high pressure, low temperature metamorphism. Field research will be conducted in three areas: (1) the eastern Alps of Austria; (2) west-central Idaho, USA; and (3) the island of Sifnos in the Aegean Sea. Laboratory work will be carried out primarily at Harvard where an electron microprobe analyzer will be used to determine P-T paths from mineral assemblages and a heating/freezing microscope stage will be used to estimate conditions of fluid immiscibility. Geochronological work will be of the 40 Ar/39 Ar-type and will be performed in a laboratory whose identity is not specified.