Collaborative Research: Understanding the Causes of Continental Intraplate Tectonomagmatism: A Case Study in the Pacific Northwest

合作研究：了解大陆板内构造岩浆作用的原因：太平洋西北地区的案例研究

• 批准号: 0506887
• 负责人: William Hart
• 金额: --
• 依托单位: Miami University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0506887&HistoricalAwards=false
• 关键词: Collaborative; Research; Understanding; Causes; Continental

0506887HartThese awards involve an investigation of the causes and consequences of intraplate volcanism in the Tertiary-Recent magmatic province in eastern Oregon. The project will focus on four main questions related to generating the intraplate magmatism: 1) Is a plume required? ; 2) What role does subduction play? ; 3) What role does lithospheric structure play in generating/controlling magmatism and how has magmatism affected lithospheric structure? ; and 4) What role does continental crust play in magmatism and how is continental crust modified by magmatism? To answer these questions the PI's will acquire passive (James and Fouch) and active (Keller) seismic data, incorporating data from the Bigfoot array (US Array), new geochronological and geochemical data (Carlson, Duncan, Grunder, Hart) and experimental petrological investigations (Grove) on targeted magmatic products and undertake numerical and laboratory dynamical modeling.

0506887哈特这些奖项涉及对俄勒冈州东部第三纪-新近纪岩浆区板内火山活动的原因和后果的调查。该项目将集中于与产生板内岩浆作用有关的四个主要问题：1）是否需要羽流？（2）俯冲作用起什么作用？3）岩石圈结构在岩浆活动的发生和控制中起着什么作用，岩浆活动又是如何影响岩石圈结构的？陆壳在岩浆活动中起什么作用，岩浆活动对陆壳的改造是怎样的？为了回答这些问题，PI将采集被动（James和Fouch）和主动（Keller）地震数据，并结合来自大脚阵列（US Array）的数据、新的地质年代学和地球化学数据（Carlson、邓肯、Grunder、哈特）以及针对目标岩浆产物的实验岩石学调查（格罗夫），并进行数值和实验室动力学建模。