MARGINS: Collaborative Research: Synthesis and Integration of Magmagenetic Controls for Subduction Factory Focus Sites

边缘：合作研究：俯冲工厂焦点地点岩浆成因控制的综合和整合

• 批准号: 0840448
• 负责人: Peter van Keken
• 金额: $ 6.88万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0840448&HistoricalAwards=false
• 关键词: MARGINS; Collaborative; Research; Synthesis; Integration

"This award is funded under the American Recovery and Reinvestment Act of 2009(Public Law 111-5)."Collaborative Research: Synthesis and Integration of Magmagenetic Controls forSubduction Factory focus sitesIntellectual Merit: The MARGINS program ends in 2009, and the organization,synthesis, and integration of the most important results is a high priority for each of thefour experiments. This proposal outlines a 3-year collaborative effort (between 5 US and2 Japanese scientists) to do this for key aspects of the Subduction Factory experiment.In co-operation with the LDEO database group, geochemical and isotopic data for fresh,young igneous rocks from the Izu-Bonin-Mariana and Central America SubductionFactory focus sites will be compiled and filtered to generate a Subduction FactoryGeochemical Reference Library of high-quality data for each arc system. Forwardmodels to explain the most important differences between the chemical and isotopiccompositions of lavas erupted from the volcanic front and rear-arc volcanoes at the twofocus sites will be generated and tested against compositions in this Library. Models willbe site-specific, using all available geophysical observations to generate thermalstructure and melt distribution models appropriate for each focus site. Best estimates forthe compositions of subducted sediments and oceanic crust at each focus site will beused as input to thermodynamic models simulating equilibrium metamorphic reactions,dehydration, and melting of subducted sediments and oceanic crust (slab) within thesubduction zone. Interaction of these slab fluids and melts with overlying mantleperidotite to yield primitive basalt will be modeled using the "Arc Basalt Simulator"(ABS), an Excel macro that explicitly separates key forcing functions and is designed tobe flexible and accessible. Several improvements to ABS will also be accomplishedduring this project.Broader Impacts: This project is in response to calls for synthesis and integration effortsby the 2004 MARGINS Review Committee. Dissemination of results and training Earthscientists to use ABS will be accomplished at two free workshops at national scientificmeetings. A lesson plan that uses ABS and the Subduction Factory GeochemicalLibrary to explore the most important controls on subduction-zone magma genesis willbe developed; this will be aimed at upper division Geoscience majors and beginninggraduate students. Broader dissemination of the most important results to the generalpublic will be accomplished via development of a Wikipedia entry for "SubductionFactory".NATIONAL SCIENCE FOUNDATIONProposal AbstractProposal:0840794 PI Name:Stern, RobertPrinted

“该奖项是根据 2009 年美国复苏和再投资法案（公法 111-5）资助的。”合作研究：俯冲工厂的岩浆成因控制的综合和整合 智力优点：MARGINS 计划于 2009 年结束，组织、综合，并且最重要结果的整合是四个实验中每一个实验的高度优先事项。该提案概述了为实现俯冲工厂实验的关键方面而进行的为期 3 年的合作努力（5 名美国科学家和 2 名日本科学家）。与 LDEO 数据库组合作，从伊豆-小博宁-马里亚纳和中美洲俯冲工厂重点站点将被编译和过滤，以生成每个弧系统的高质量数据的俯冲工厂地球化学参考库。将生成正演模型，以解释两个焦点地点的火山前部和弧后火山喷发的熔岩的化学和同位素成分之间最重要的差异，并根据该库中的成分进行测试。模型将针对特定地点，使用所有可用的地球物理观测来生成适合每个焦点地点的热结构和熔体分布模型。对每个焦点地点的俯冲沉积物和洋壳成分的最佳估计将用作热力学模型的输入，该模型模拟俯冲带内俯冲沉积物和洋壳（板片）的平衡变质反应、脱水和熔化。这些板片流体和熔体与上覆幔橄榄岩相互作用以产生原始玄武岩，将使用“弧玄武岩模拟器”(ABS) 进行建模，这是一个 Excel 宏，可明确分离关键的强迫函数，并且设计灵活且易于访问。 ABS 的多项改进也将在该项目期间完成。 更广泛的影响：该项目是为了响应 2004 年 MARGINS 审查委员会提出的综合和整合工作的号召。结果的传播和地球科学家使用 ABS 的培训将在国家科学会议期间的两次免费研讨会上完成。将制定一个课程计划，利用 ABS 和俯冲工厂地球化学图书馆来探索对俯冲带岩浆成因最重要的控制；这将针对地球科学专业的高年级学生和研究生。通过开发“SubductionFactory”的维基百科条目，可以更广泛地向公众传播最重要的成果。国家科学基金会提案摘要提案：0840794 PI 姓名：Stern, RobertPrinted