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

RUI：阿拉斯加中南部兰格利亚复合地体和麦金利断层的早期第三纪火山活动：增生和走滑构造对......的影响

• 批准号: 9814377
• 负责人: Ronald Cole
• 金额: $ 15.01万
• 依托单位: Allegheny College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-03-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814377&HistoricalAwards=false
• 关键词: RUI; Early; Tertiary; Volcanism; Across

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.***

9814377Cole 阿拉斯加南部的大陆边缘具有动态的侏罗纪-第三纪构造历史，包括从板块俯冲到地体碰撞的过渡，以及随后伴随着这些不断变化的构造环境的区域走滑断层火山活动，但存在许多关于岩浆来源和演化的问题并且没有令人信服的模型可以在区域构造事件的背景下解释它们的起源。 该项目将确定火山岩之间是否存在同岩浆关系，以揭示任何独特的构造岩浆作用过程，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，以更好地了解火山岩的运动学地体增生和走滑构造之间的过渡。 结果将适用于阿拉斯加地质和其他造山带，在这些造山带中，火山活动伴随着构造环境的冲锋。***