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预测该项目采用了一种创新的方法，将侵入深成岩体的复杂三维热模拟与变质岩的结构模拟研究相结合，以提供一种新的工具来研究山带中控制压力和温度的过程。这项研究将使用定量模型来解释缅因州西北部地区范围内的岩石结构，因为它们与泥盆纪时期侵位于中地壳的侵入体周围的压力-温度-流体流动历史的详细方面有关。这项工作将精炼缅因州西北部变质事件的热历史，解释与变质条件变化有关的矿物结构的细微横向变化，并说明变质带不同部分的反应机制是如何由于不同的压力-温度-流体情景而进行的。一般的方法适用于非常广泛的变质研究，因为解开变质结构并将它们与特定的热场联系起来，有可能为许多变质系统的发展提供关键的洞察。该项目是路易斯安那州立大学的B.L.Dutrow和爱荷华州立大学的C.T.福斯特共同开展的研究。杜特洛负责研究区泥质岩的热模拟研究和地热气压测定；福斯特负责记录研究区岩石的结构，并构建热力学和动力学模型，将它们与热模型联系起来。

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.