COLLABORATIVE RESEARCH: Petrologic, Isotopic, and Structural Evolution of Low Pressure Metamorphism in an Accretionary Complex, Eastern Chugach Mountains, Alaska

沿会聚边缘的海脊俯冲的变质和构造后果并不为人所知，但意义重大，因为几乎所有的会聚边缘最终都将消耗一个扩张中心。EAR90-18717和EAR90-20391的合作项目将研究丘加赫变质杂岩，该杂岩具有几个可归因于第三纪隆起俯冲的不寻常特征。工作重点将集中在异常的低P，高T变质作用以及伴随着该变质组合形成的构造和运动学背景。这些结果将导致与山脊俯冲相关的构造的一般模型。

The metamorphic and structural consequences of ridge subduction along a convergent margin are not well known, but is significant because virtually all convergent margins will ultimately consume a spreading center. This collaborative project between EAR90-18717 and EAR90-20391 will examine the Chugach metamorphic complex which possesses several unusual features that can be attributed to ridge subduction in the Tertiary. Work will focus on the anomalous low P, high T metamorphic and the structural and kinematic setting which accompanied the formation of this metamorphic assemblage. Results will lead to a general model for ridge subduction-related tectonics.