RUI: Early Tertiary Volcanism Across the Wrangellia Composite Terrane and McKinley Fault, South-Central Alaska: Influence of Accretionary and Strike-Slip Tectonics on....

阿拉斯加南部大陆边缘具有侏罗纪-第三纪的动态构造史，其中包括从板块俯冲到地体碰撞的过渡，以及随后伴随着这些变化的构造环境的区域走滑断裂火山作用，但在区域构造事件的背景下，存在许多关于岩浆来源和演化的问题，也没有可信的模式来解释其起源。该项目将确定火山岩之间是否存在共岩浆关系，以揭示任何独特的构造岩浆作用，确定火山岩的喷发历史，并记录火山活动之前、期间和之后的变形性质，以更好地了解地体增生和走滑构造之间转换的运动学。研究结果将适用于阿拉斯加地质学和在构造环境中火山活动伴随电荷的其他造山带。*

9814377Cole The continental margin of southern Alaska has a dynamic Jurasic-Tertiary tectonic history that included a transitiion from plate subduction to terrane collision and subsequent regional strike-slip faulting volcanism accompanied each of these changing tectonic environments, but many questions about magma source and evolution exist and there is no cogent model that explain their origin in the context of regional tectonic events. This project will determine if there are co-magmatic relationships among the volcanic rocks to reveal any distinctive tectonomagmatic processes, determine the eruption history of the volcanic rocks and to document the nature of deformation before, during and after volcanism to better understand the kinematics of the transition between terrane accretion and strike-slip tectonics. Results will be applicable to Alaskan geology and to other orogens where volcanism accompanied a charge in tectonic environment.***