Dynamics of Oceanic Triple Junctions, Hotspots, and Bathymetric Plateaus

海洋三重交汇处、热点和测深高原的动态

• 批准号: 0550250
• 负责人: Jennifer Georgen
• 金额: $ 15.52万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-01-15 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0550250&HistoricalAwards=false
• 关键词: Dynamics; Oceanic; Triple; Junctions; Hotspots

This program will develop three-dimensional numerical models of triple junctions to examine patterns of mantle flow and melting and crustal accretion. While important in the plate tectonic record, triple junctions have not been fully examined in terms of their impact on such processes as crustal accretion. The numerical models will take into account variable viscosity, melting, buoyancy, and migration of triple junctions in the absolute plate reference frame. Through the addition of a thermally buoyant melt source, the numerical models will also consider plume-ridge interaction and the formation of marine large igneous provinces. Broader impacts of the proposed work include contributing to the resolution of fundamental questions about triple junctions and large igneous provinces, training of a graduate student, and support for a new investigator.

该计划将开发三重结合部的三维数值模型，以研究地幔流动、熔融和地壳增生的模式。虽然在板块构造记录中很重要，但三重结合部对地壳吸积等过程的影响尚未得到充分研究。数值模型将考虑绝对板块参考系中三重结点的可变粘度、熔融、浮力和迁移。通过增加一个热浮力熔融源，数值模式还将考虑烟羽-山脊相互作用和海洋大型火成岩省的形成。拟议工作的更广泛影响包括有助于解决关于三重交汇点和大型火成岩省的基本问题，培训一名研究生，以及支持一名新的调查员。