Integrative 3-D Modeling of Upper Mantle Flow and Melting Beneath the Lau Basin

上地幔流动和 Lau 盆地下方熔融的综合 3-D 建模

• 批准号: 1060878
• 负责人: Laurent Montesi
• 金额: $ 29.47万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-03-01 至 2016-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1060878&HistoricalAwards=false
• 关键词: Integrative; Modeling; Upper; Mantle; Flow

Lau Basin is a site of backarc seafloor spreading behind the adjacent Tonga Trench and Arc system, and is a particularly good field laboratory for studies of backarc spreading where models are well constrained by seismic and geochemical data. This study will use a combination of geodynamical and geochemical modeling methods to characterize 3-D flow in the mantle beneath the spreading centers (which are analogous to mid-ocean spreading centers such as the Mid-Atlantic Ridge) in the Lau Basin. The aim of this research is to understand how various factors such as spreading rate and proximity to the adjacent subducting slab and volcanic arc affect mantle processes beneath the spreading system. Broader impacts include the development of new analytical tools, educational outreach programs for minority students at local schools, involving undergraduate students in the research program and support for an early career female scientist.

劳盆地是邻近汤加海沟和弧系统后面的弧后海底扩张地点，是研究弧后扩张的特别好的现场实验室，其中模型受到地震和地球化学数据的良好约束。这项研究将结合地球动力学和地球化学建模方法来描述劳盆地扩张中心（类似于大洋中部扩张中心，如大西洋中脊）下方地幔的 3-D 流动特征。这项研究的目的是了解各种因素（例如扩张速度和邻近俯冲板片和火山弧的接近程度）如何影响扩张系统下方的地幔过程。更广泛的影响包括开发新的分析工具、针对当地学校少数民族学生的教育推广计划、让本科生参与研究计划以及支持早期职业女性科学家。