The Dynamics of Mid-Ocean Ridges

大洋中脊的动力学

• 批准号: 9202599
• 负责人: E M Parmentier
• 金额: $ 34.76万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-01 至 1996-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9202599&HistoricalAwards=false
• 关键词: Dynamics; Mid; Ocean; Ridges

This is an ongoing theoretical study of the dynamics of mid- ocean ridges. A range of modeling studies will test existing hypothesis, explore new ones based on existing observations, and make predictions that will suggest new observations. The primary emphasis will be on spreading center structure and segmentation as well as the exisodic nature of the spreading. Specific tasks will be studies of convection generated by composional and thermal buoyancy, 3-D modeling of melt migration, the evolution of ridge geometry, the mechanical factors that control the spacing, dip, and displacement of ridge-parallel normal faults, the importance of strain-rate dependence of viscosity, and an extension of existing of existing 2-D models of the formation of the median valley to three dimensions.

这是一项正在进行的关于洋中脊动力学的理论研究。一系列的建模研究将检验现有的假设，在现有观察的基础上探索新的假设，并做出预测，提出新的观察结果。重点将放在传播中心的结构和分割以及传播的偶然性上。具体的任务将是研究由组成浮力和热浮力产生的对流，熔体迁移的三维建模，脊的几何演化，控制脊平行正断层的间距、倾角和位移的机械因素，粘度的应变率依赖性的重要性，以及将现有的二维中谷形成模型扩展到三维。