Collaborative Research: Post-eruption reinflation at Axial Seamount

合作研究：轴海山喷发后再膨胀

• 批准号: 1356839
• 负责人: William Chadwick
• 金额: $ 12.76万
• 依托单位: Oregon State University
• 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 2018-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1356839&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. 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是位于东北太平洋Juan de Fuca海岭的一座活海底火山，于1998年和2011年爆发。最近的这一活动为研究海底火山活动、热液喷发和生物反应之间的动态相互作用提供了机会。Axial是世界上第一个也是唯一一个在海底记录火山变形周期的地点，它很快将拥有运行传感器和实时数据传输，作为海洋观测站倡议（OOI）的一部分。能够根据最近的海底变形预测未来可能的岩浆活动，以及有关岩浆注入的推论，可能有助于指导OOI科学规划，继续监测海底深度变化将记录与轴向海山岩浆膨胀/收缩有关的垂直变形。底部压力记录仪提供连续的数据，并对现有基准进行重新占用，这将量化长（年）和短（分钟-小时）时间尺度上的行为。自1998年以来，有两次火山爆发被部分记录在案，但对火山爆发前通货膨胀期的测量并不完整。由于轴是在什么被解释为现在的再膨胀阶段，继2011年爆发，机会，以完成表征的周期存在。这一大地测量实地考察将于2015年和2017年进行，学生参与并提供海底图像，用于“球体上的科学”展览。