Magma Loading and Barrovian Metamorphism: A Critical Analysis, Nason Terrane, Washington

9304021埃文斯本研究计划结合了华盛顿州纳森地体的野外工作、结构测量和解释、岩相学、相岩学、热压法和同位素年龄测定。 这项研究的目的是严格审查的现场证据，最近提出的构造模型称为岩浆加载的基础上。 该模式反映了深圳湾岩体的变质、变形作用时间上的一致性，岩体间的空间关系和压力、温度的分布和历史，以及产生和消除陡气压梯度的挠曲事件。 拟议的研究具有重大意义的地壳建设和变质过程中的大体积岩浆弧。

9304021 Evans This research proposal combines field work, structural measurements and interpretation, petrography, phase petrology, thermobarometry, and isotopic age determinations in the Nason Terrane of the state of Washington. The purpose of the study is to examine critically the field evidence on which the recently proposed tectonic model termed magma loading is based. The model implies coincidences in timing between plutonism, metamorphism and deformation, spatial relationships among plutons and the distribution and history or pressure and temperature, and flexuring events producing and then eliminating steep baric gradients. The proposed research has major implications for crust-building and metamorphic processes in large-volume magmatic arcs.