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大洋中脊动力学的理论研究。 一系列建模研究将测试现有的假设，根据现有的观察结果探索新的假设，并做出预测以提出新的观察结果。 主要重点是传播中心结构和分割以及传播的存在性。 具体任务将包括研究成分和热浮力产生的对流、熔体迁移的 3-D 建模、山脊几何形状的演变、控制山脊平行正断层的间距、倾角和位移的力学因素、粘度应变率依赖性的重要性，以及将现有的中谷形成的现有 2-D 模型扩展到三个维度。