Collaborative Proposal: Bubble Size Distributions as a Diagnostic Tool for Volcanic Processes

合作提案：气泡尺寸分布作为火山过程的诊断工具

• 批准号: 0509859
• 负责人: Alexander Proussevitch
• 金额: --
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-01 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0509859&HistoricalAwards=false
• 关键词: Collaborative; Proposal; Bubble; Size; Distributions

The primary focus of the project is to develop new indirect methods to infer magmatic and vesiculation conditions in volcanic conduits and chambers from statistical analysis of bubble size distributions in vesicular volcanic products. With the appropriate mechanistic framework, bubble size distributions (BSD) should be able to provide a new dimension of understanding of volcanic systems and eruption styles to complement insights that have emerged from petrology, magma chemistry and geophysical observations. In this study, a scientific methodology will be developed for using observed bubble populations to infer the magmatic vesiculation conditions and processes that drive volcanic eruptions. The end result of the study will enable the community to use commonly available vesicular volcanic products as "remote sensing" tools that record magma history prior to and during volcanic eruptions.To achieve this research goal, high quality "observed BSDs" will be obtained from volcanic products to compare with "simulated BSDs" resulting from numerical Monte Carlo simulations of specific vesiculation processes. A synthesis of observed and simulated BSDs will make possible "remote sensing" of magmatic conditions and volcanic eruption drivers (vesiculation processes) by studying the vesiculation history recorded in the BSDs in volcanic rocks. This will have a broader impact in allowing eruption products to be used to more effectively determine eruption processes and ultimately to predict eruption energy, style, and timing for hazard mitigation.

该项目的主要重点是开发新的间接方法，从囊泡火山产品中气泡大小分布的统计分析中，在火山导管和腔室中推断岩浆和囊泡条件。借助适当的机械框架，气泡尺寸分布（BSD）应该能够提供对火山系统和喷发样式的理解的新维度，以补充岩石学，岩浆化学和地球物理观察的见解。在这项研究中，将开发一种科学方法，用于使用观察到的气泡种群来推断降水量和驱动火山喷发的过程。该研究的最终结果将使社区能够使用常见的囊泡火山产品作为“遥感”工具，这些工具在火山喷发之前和期间都记录了岩浆历史。为了实现这一研究目标，将从中获得高质量的“观察到的BSD”火山产品与特定囊泡过程的数值蒙特卡洛模拟产生的“模拟BSD”进行了比较。观察到的BSD和模拟BSD的合成将使岩浆条件和火山喷发驱动器（囊泡过程）的“遥感”通过研究火山岩中的BSD中记录的囊泡历史。这将在允许使用喷发产品更有效地确定喷发过程，并最终预测喷发能量，风格和缓解危害的时机时产生更大的影响。