RPG: Application of Perthitic Microtexture to the Study of High Grade Terranes: Examples from the Adirondack Mountains, New York

翻译后摘要：规划补助金将被用来调查条纹长石微观结构的各种高级变质岩在阿迪朗达克山脉。 通过依赖记录良好的阿迪朗达克山脉的变质岩和火成岩，记录了广泛的压力，温度和变形制度，应该有可能记录在一系列条件下的碱性长石的结构和化学行为。 通过揭示化学交换的细节和可能形成的晶内微孔网络，这项研究将针对碱金属长石在稳定同位素交换、放射性测年、地质温度测定、地质压力测定、风化、渗透性发展、变形机制等研究中的可能限制。 从阿迪朗达克地区精心挑选的样品将通过光学显微镜进行分析，这是PI开发的一种独特的蚀刻/SEM技术，最终通过TEM和电子探针进行分析。 部分工作将在家庭机构和/或附近的实验室进行，而很大一部分将在爱丁堡大学（所有必要的设施都在一个位置）在PI的初级教师休假期间完成。 一旦这些方法的可行性得到测试，PI将设计一个或多个地区在阿迪朗达克山脉的深入研究，并提交一份完整的研究建议，以研究委员会。 9

Abstract: The planning grant will be used to survey perthite microtextues from a variety of high-grade metamorphic rocks in the Adirondack Mountains. By relying on the well-documented metamorphic and igneous rocks of the Adirondacks, which record a wide range of pressure, temperature, and deformational regimes, it should be possible to document the textural and chemical behavior of alkali feldspars over a range of conditions. By revealing the details of chemical exchange and possible development of intracrystalline networks of micropores, this study will target possible limitations on the use of alkali feldspars in studies of stable isotope exchange, radiometric dating, geothermometry, geobarometry, weathering, permeability development, deformation mechanisms, etc. Samples from carefully selected localities in the Adirondacks will be analyzed by optical microscopy, a unique etching/SEM technique developed by the PI, and ultimately by TEM and electron microprobe. Part of the work will be carried out at the home institution and/or nearby labs, while a significant part will be done at Edinburgh University (where all necessary facilities are available at one location) during the PI's junior faculty leave. Once the feasibility of the methods has been tested, the PI will design an intensive study of one or more areas in the Adirondacks, and submit a full research proposal to EAR. 9