Collaborative Research: Magma Reservoir-Conduit Dynamics Revealed by Borehole Geophysical Observatory and Continuous GPS

合作研究：钻孔地球物理观测站和连续 GPS 揭示的岩浆储层-管道动力学

• 批准号: 0116067
• 负责人: Alan Linde
• 金额: $ 30万
• 依托单位: Carnegie Institution of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-04-15 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0116067&HistoricalAwards=false
• 关键词: Collaborative; Research; Magma; Reservoir; Conduit

0116067Linde The ongoing eruption of the Soufriere Hills Volcano (SHV) on Montserrat provides an unprecedented opportunity to investigate complex magmatic processes at an andesitic volcano. Growth of the lava dome has been unsteady and accompanied by cyclic patterns of ground deformation, seismicity, and explosive eruptions. The cycles include a short-term scale (6-18 hour), a meso-term scale (~7 weeks), and a long-term scale (~30 y). They provide insights into eruption dynamics at andesite volcanoes, with the short-term cycles suggesting that degassing, rheological stiffening of the magma, and pressurization in the upper conduits are coupled and control many of the geophysical and dynamical phenomena observed. The meso- and long- term cycles may reflect deep-seated processes involving the magma reservoir. This project will investigate the dynamics of the full system using an integrated array of specialized instruments in four strategically located 200-m boreholes, and several shallower holes, surrounding SHV. The system is active and dynamic and will remain so for the foreseeable future. Analysis of the continuous perishable data provided by these instruments should provide important new insights and specific constraints to theoretical models, involving the dynamic behavior of the andesite magmatic system.This is a collaborative project involving P.I.s from Penn State University, Carnegie Institution of Washinton, University of Arkansas, in collaboration with Montserrat Volcano Obervatory (MVO) and scientists from Bristol and Leeds Universities in the UK. The UK investigators have been funded to share drilling costs and to support UK scientific analyses. The expertise, facilities, and database of MVO also provide cost-share contributions.***

0116067Linde在蒙特塞拉特（Montserrat）上正在进行的Soufriere Hills火山（SHV）的爆发提供了一个前所未有的机会，可以调查安第斯山脉火山的复杂岩浆过程。 熔岩圆顶的生长一直不稳定，并伴随着地面变形，地震性和爆炸性喷发的环状模式。 周期包括短期量表（6-18小时），中期量表（〜7周）和长期量表（〜30 y）。 它们提供了对安山岩火山喷发动力学的见解，短期周期表明，脱气，岩浆的流变学僵硬以及上层导管中的加压是耦合的，并控制了许多地球物理和动态现象。 中期和长期循环可能反映涉及岩浆储层的深处的过程。 该项目将使用四个战略性地位于200米的钻孔和周围SHV周围的几个较浅的孔中使用一系列集成的专业仪器来调查完整系统的动态。 该系统具有活跃和动态性，并且在可预见的将来将保持如此。 分析这些工具提供的连续易腐数据应为理论模型提供重要的新见解和特定限制，涉及安山岩岩浆系统的动态行为。这是一个合作的项目，涉及宾夕法尼亚州立大学的P.I.S，来自宾夕法尼亚州立大学，卡内基大学，卡内基大学，华盛顿大学，大学，沃什顿顿大学。阿肯色州与蒙特塞拉特火山覆盖（MVO）以及英国布里斯托尔和利兹大学的科学家合作。 英国调查人员已获得资助，以分担钻探成本并支持英国科学分析。 MVO的专业知识，设施和数据库也提供成本份额贡献。***