Modeling the Dispersion of Plume Heads Beneath Ridges and the Growth of Large Igneous Provinces

模拟山脊下羽流头的扩散和大型火成岩省的生长

• 批准号: 0213421
• 负责人: Christopher Kincaid
• 金额: $ 28.25万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0213421&HistoricalAwards=false
• 关键词: Modeling; Dispersion; Plume; Heads; Beneath

This study will use a combination of numerical and laboratory (analog) models to investigate the dispersal and interaction between plume heads and the overlying lithospheric plates upon which they impinge. Models will include the effects of melting, on and off-axis cases, and the influence of ridge segmentation and plate rheology on along-axis flow. Models include both 2D and 3D numerical models and 3D scaled analog ones. The modeling will include both plume heads (LIPs), and their more steady-state tails. In general, the experiments will explore the thermal, compositional, and dynamic evolution of plume heads for a range of conditions. More specific models will examine the case of the Ontong-Java plateau system- the earth's largest known plume head. The modeling efforts are part of a cycle of observations, theory, predictions, more observation which is expected to lead to specific ODP drilling proposals.

这项研究将结合数值和实验室（模拟）模型来研究羽流头部与其撞击的上覆岩石圈板块之间的扩散和相互作用。模型将包括熔化、轴上和离轴情况的影响，以及脊分割和板流变学对沿轴流动的影响。 模型包括 2D 和 3D 数值模型以及 3D 缩放模拟模型。建模将包括两个羽流头部 (LIP) 及其更稳态的尾部。一般来说，实验将探索一系列条件下羽流头的热、成分和动态演化。更具体的模型将研究翁通-爪哇高原系统的情况——地球上已知最大的羽流头。建模工作是观察、理论、预测和更多观察循环的一部分，预计将产生具体的 ODP 钻探建议。