Collaborative Research: Investigating the Relationship Between Pluton Growth and Volcanism at Two Active Intrusions in the Central Andes

合作研究：调查安第斯山脉中部两个活跃侵入体的岩体生长与火山活动之间的关系

• 批准号: 0908140
• 负责人: Todd Feeley
• 金额: $ 40.52万
• 依托单位: Montana State University
• 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: 2009-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0908140&HistoricalAwards=false
• 关键词: Collaborative; Research; Investigating; Relationship; Between

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Our knowledge of how crustal magma chambers evolve and how these magma chambers relate to plutons and eruptions is inadequate, largely because nobody has yet conducted a comprehensive study of an active crustal magma chamber. This project provides a unique opportunity to do so and will provide fundamentally new insights into deep crustal magma generation, storage, and differentiation. The PIs have designed the project taking advantage of what may be the early stages leading up to an ignimbrite eruption. Given that a large ignimbrite eruption has never been observed, let alone the build-up to one, this might be a once in a many-generation opportunity. The project builds on recent InSAR results that show large-scale rapid uplift situated over several volcanoes in the Central Andes. The research is focused on resolving the location, size, and shape of the magma chambers, and the rates at which they are filling. The combination of InSAR, GPS geodesy, and microgravity measurements will provide the essential data for magma fluxes at present. Fluvial geomorphology will be used to estimate uplift rates over a longer time. Seismic and magnetotelluric studies will provide independent information about the location and size of any magma chamber. The mechanism of magma transport through the crust is very important for a number of issues ranging from the manner of crust formation via magma addition to basic hazard predictions for volcanic eruptions. Investigating the development of a large mid-crustal magma chamber while it is being built is the best way to advance our understanding of this issue and the interdisciplinary approach in this proposal is key. The project includes close collaboration with scientists from the University of Bristol (UK) who are funded by NERC and with research groups in Chile, Argentina and Bolivia.

该奖项是根据2009年《美国复苏与再投资法》（公法111-5）资助的。我们对地壳岩浆腔的发展以及这些岩浆腔与岩石和喷发的关系的了解不足，这很大程度上是因为还没有人对活跃的地壳岩浆室进行全面研究。该项目提供了一个独特的机会，并将为深层岩浆生成，存储和差异化提供从根本上提供新的见解。 PI设计的项目利用了可能导致Ignimbrite爆发的早期阶段。鉴于从未观察到大型的Ignimbrite爆发，更不用说成为一个人的堆积了，这可能是一次曾经是一代人的机会。该项目建立在最近的InsAR结果的基础上，该结果显示了安第斯山脉中部的几座火山上的大规模快速升高。该研究的重点是解决岩浆腔的位置，大小和形状以及它们所填充的速度。目前，INAR，GPS GEODESY和微重力测量的组合将为岩浆通量提供基本数据。河流的地貌将在更长的时间内用于估计提升率。地震和磁铁性研究将提供有关任何岩浆室位置和大小的独立信息。岩浆通过地壳传输的机制对于从岩浆形成的方式到火山喷发的基本危害预测等许多问题非常重要。在建造一个大型中期岩浆室的发展时，它是提高我们对这个问题的理解的最佳方法，而该提案中的跨学科方法是关键。该项目包括与布里斯托尔大学（英国）的科学家的密切合作，这些科学家由NERC资助以及智利，阿根廷和玻利维亚的研究小组资助。