Formulating and Testing Dynamic Earth Models with Plate Kinematics, Tomography and Sea-Level

利用板块运动学、断层扫描和海平面制定和测试动态地球模型

• 批准号: 9814577
• 负责人: Michael Gurnis
• 金额: $ 14万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814577&HistoricalAwards=false
• 关键词: Formulating; Testing; Dynamic; Earth; Models

9814577 Gurnis The investigators propose to develop and test global dynamic Earth models and regional dynamic models of subduction zones. By studying slab structure at regional scales, they will constrain material properties of slabs, which are difficult to determine with global models. Such regional models of subduction zones can also be tested with relative sea--level. They propose to first develop regional spherical models for North America since ~ 80 Ma, the Tonga-Kermedec region since ~ 60 Ma, and the Mariana to Japan region since ~ 50 Ma. They will attempt to constrain the effective viscosity of these subduction zones. Using such constraints on viscosity from regional subduction zone models the investigators will formulate global flow models constrained by plate tectonic evolution since ~ 100 Ma. Such models will first be tested against global tomographic inversions and then against relative sea--level change.

9814577 Gurnis研究人员建议开发和测试全球动力学地球模型和俯冲带的区域动力学模型。 通过研究区域尺度的板结构，它们将约束板的材料特性，这是难以确定的全球模型。 这种俯冲带的区域模型也可以用相对海平面来检验。 他们建议首先为北美自~ 80 Ma以来，汤加-Kermedec地区自~ 60 Ma以来，马里亚纳至日本地区自~ 50 Ma以来开发区域球形模型。 他们将试图限制这些俯冲带的有效粘度。 利用区域俯冲带模型对粘度的这种约束，研究人员将制定自~ 100 Ma以来受板块构造演化约束的全球流动模型。 这种模式将首先对全球层析反演进行测试，然后对相对海平面变化进行测试。