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，通过对泡状火山产品中气泡大小分布的统计分析，推断火山管和洞穴中的岩浆和气泡形成条件。在适当的机制框架下，气泡大小分布(BSD)应该能够为理解火山系统和喷发方式提供一个新的维度，以补充岩石学、岩浆化学和地球物理观测得出的见解。在这项研究中，将开发一种科学方法，利用观测到的气泡数量来推断驱动火山喷发的岩浆泡沫化条件和过程。这项研究的最终结果将使社区能够使用普遍可用的气泡火山产品作为记录火山喷发前和火山喷发期间岩浆历史的“遥感”工具。为了实现这一研究目标，将从火山产品中获得高质量的“观测到的BSD”，并将其与通过蒙特卡罗数值模拟特定的气泡形成过程得到的“模拟BSD”进行比较。通过研究火山岩中BSD中记录的气泡历史，综合观测和模拟的BSD将可能对岩浆条件和火山喷发驱动因素(气泡作用过程)进行“遥感”。这将产生更广泛的影响，使喷发产品能够更有效地确定喷发过程，并最终预测喷发能量、喷发风格和减灾时机。