Collaborative Research: Monitoring inflation at Axial Seamount

合作研究：监测轴向海山的通货膨胀

• 批准号: 1342914
• 负责人: Scott Nooner
• 金额: $ 4.78万
• 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: 2013
• 资助国家: 美国
• 起止时间: 2013-05-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1342914&HistoricalAwards=false
• 关键词: Collaborative; Research; Monitoring; inflation; Axial

ABSTRACT (Chadwick/Nooner)OCE-0725605/0726093Intellectual Merit: This research will continue measurements of long term volcanic inflation of the seafloor at Axial Seamount on the Juan de Fuca Ridge using an innovative new pressure sensor/benchmarking method. Present data show Axial Volcano has been re-inflating since its 1998 eruption. The center of Axial caldera has been uplifted 2.4 m since then. At the current rate of inflation, it is estimated that in another 4-8 years Axial will be fully inflated and ready to erupt again. Axial volcano is the only underwater volcano in the world where inflation and deflation is being measured, where the magma supply rate can be quantified, and where an entire volcanic cycle can be documented. Data from the project will be able to be used to constrain the depth of magma movements beneath the caldera, show how the magma supply rate changes over time, and help determine whether or not eruptions can be forecast. Measurements of the volcano will be made in 2009 and 2011 at an array of seafloor benchmarks inside and outside the caldera using a remotely operated vehicle. The measurements follow a NOAA funded survey in the summer of 2007 and will provide inflation data every two years until 2011. Data will then be compared to other volcanic regions and used to optimize crustal deformation models. Goals will be to determine whether the inflation rate follows an exponential decay that is governed by the pressure gradient between a deep source that supplies magma to the shallow reservoir beneath the caldera. It will also seek to determine if magma delivery is focused, supplied at a higher rate, and stored in a deeper and larger reservoirs than at normal mid-ocean ridge segments. Broader Impacts: Broader impacts of the work include support of an early career scientist, and support for public outreach from NOAA's successful NeMO web site which features education and outreach material for students, teachers, and the general public that are related to eruptions on Axial Volcano since 1998.

摘要（Chadwick/Nooner）OCE-0725605/0726093Intlectual Furet：这项研究将继续测量Juan de Fuca Ridge上使用创新的New Pressignative New Pression Septioner/Benchmark Marksking方法的轴向海底的长期火山膨胀。 目前的数据显示，轴向火山自1998年喷发以来一直在重新膨胀。 从那时起，轴向火山口的中心已被提升2.4 m。按目前的通货膨胀率，据估计，在另外4 - 8年的时间里，轴向将完全膨胀并准备再次爆发。轴向火山是世界上唯一测量通货膨胀和通气，可以量化岩浆供应率以及可以记录整个火山循环的水下火山。 该项目的数据将能够用于限制火山口下岩浆运动的深度，显示岩浆供应率如何随时间变化，并有助于确定是否可以预测喷发。 火山的测量将于2009年和2011年在火山口内外的一系列海底基准中使用远程操作的车辆进行。测量结果遵循2007年夏季NOAA资助的调查，并将每两年提供一次通货膨胀数据。然后将将数据与其他火山区进行比较，并用于优化地壳变形模型。 目标是确定通货膨胀率是否遵循指数衰减，该衰减受到向岩浆在火山口下浅水储层的深度源之间的压力梯度所支配的。 它还将寻求确定是否将岩浆的聚焦为重点，以更高的速度提供，并保存在更深层次的水库中，而不是在正常的中山脊区域。更广泛的影响：这项工作的更广泛影响包括对早期职业科学家的支持，以及支持NOAA成功的NEMO网站的公众外展，该网站为学生，老师和公众提供与1998年以来与轴向火山喷发有关的教育和外展材料。