Collaborative Research: Simulation of Metamorphism Near Plutons in the Middle Crust: An Approach Combining 3-D Thermal Models and Forward Models of Metamorphic Textures

9814372福斯特该项目采用了一种创新的方法，将侵入岩体的复杂三维热模拟与变质岩的结构模拟研究相结合，以便为研究控制山区压力和温度的过程提供一种新的工具。 这项研究将使用定量模型来解释岩石质地在区域范围内在西北缅因州，因为它们涉及到详细方面的压力-温度-流体流动的历史侵入体周围的中地壳在泥盆纪时期侵位。 这项工作将允许细化的热历史的变质事件在西北缅因州，允许解释的微妙的横向变化有关的矿物结构的变化在变质条件下，并说明如何反应机制的进展在不同的部分变质带由于不同的压力-温度-流体的情况。 一般的方法是适用于一个非常广泛的变质研究，因为解开变质结构，并将它们连接到一个特定的热场有可能提供关键的洞察到许多变质系统的发展。 本项目是B. L.杜特罗在洛杉矶州立大学和C. T.福斯特在爱荷华州大学。 Dutrow负责研究区泥质岩的热模拟研究和地质温压测定; Foster负责记录研究区岩石的纹理，并构建热力学和动力学模型，将其与热模型联系起来。

9814372FosterThis project utilizes an innovative approach linking sophisticated 3-D thermal modeling of intruding plutons with textural modeling studies of metamorphic rocks in order to provide a new tool to investigate the processes that control pressure and temperature in mountain belts. The study will use quantitative models to interpret rock textures on a regional scale in northwest Maine as they relate to detailed aspects of the pressure-temperature-fluid flow history around intrusions that were emplaced in the middle crust during Devonian time. This work will allow refinement of thermal histories of metamorphic events in northwest Maine, permit interpretation of subtle lateral variations in mineral textures related to variations in metamorphic conditions, and illustrate how reaction mechanisms progress in different parts of a metamorphic belt due to different pressure-temperature-fluid scenarios. The general approach is applicable to an extremely broad range of metamorphic studies because unraveling metamorphic textures and linking them to a specific thermal field has the potential to provide critical insight into the development of many metamorphic systems. This project is collaborative research between B. L. Dutrow at L.S.U. and C. T. Foster at the University of Iowa. Dutrow is responsible for the thermal modeling studies and geothermobarometric determinations of pelitic rocks from the study area; Foster is responsible for documentation of textures in rocks from the study area and construction of thermodynamic and kinetic models to link them to the thermal models.