Collaborative Research: Post-eruption reinflation at Axial Seamount

合作研究：轴海山喷发后再膨胀

• 批准号: 1356216
• 负责人: Scott Nooner
• 金额: $ 13.59万
• 依托单位: University of North Carolina at Wilmington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-04-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1356216&HistoricalAwards=false
• 关键词: Collaborative; Research; Post; eruption; reinflation

Axial Seamount is an active submarine volcano on the Juan de Fuca Ridge in the NE Pacific that erupted in 1998 and 2011, and is currently inflating in a way that suggest renewed magma injection below the seafloor. This recent activity provides access to study the dynamic interactions between seafloor volcanism, hydrothermal venting, and biological responses. Axial is the first and only site in the world where a volcanic deformation cycle has been documented on the seafloor and it will soon have operating sensors and real-time data transmission as part of the Ocean Observatories Initiative (OOI). Being able to forecast possible future magmatic activity based on recent seafloor deformation, and associated inferences on magma injection, may help guide OOI science planning.Continued monitoring of seafloor depth changes will document vertical deformation associated with magmatic inflation/deflation at Axial Seamount. A combination of Bottom Pressure Recorders, which provide continuous data, and campaign-style reoccupation of existing benchmarks will quantify behavior on timescales both long (years) and short (minutes-hrs). Two eruptions have been partially documented since 1998 but measurements of the pre-eruption inflation period are not complete. Since Axial is in what is interpreted to be the re-inflation stage now, following a 2011 eruption, the opportunity to complete characterization of the cycle exists. This geodetic fieldwork will take place in 2015 and 2017, with student participation and provision of seafloor imagery for use in Science on a Sphere exhibits.

Axial Seamount是NE Pacific的Juan de Fuca Ridge上的一座活跃的海底火山，该火山于1998年和2011年爆发，目前正在以一种建议在海底下方重新注射岩浆注入的方式。这项最近的活动提供了研究海底火山，水热和生物学反应之间动态相互作用的访问。轴向是世界上第一个也是唯一的地点，在海底上已经记录了火山变形周期，它将很快将操作传感器和实时数据传输作为海洋天文台计划（OOI）的一部分。能够根据最近的海底变形预测未来的岩浆活动，以及对岩浆注入的相关推断，可以帮助指导OOI科学规划。连接对海底深度变化的监测将记录与轴向轴向轴向轴向轴向相关的垂直变形。底压记录仪的结合，提供连续数据以及现有基准的广告系列风格的重新占用，将量化长期（年）和短（分钟HRS）时标度的行为。自1998年以来，已经部分记录了两次爆发，但爆发前通货膨胀期的测量尚未完成。由于轴向是在2011年喷发之后被解释为现在的重新通信阶段，因此存在完全表征周期的机会。该测量现场工作将于2015年和2017年举行，学生参与并提供海底图像，用于在球体展览中用于科学。