Joint Seismic and Geodynamic Inversion for Whole Mantle Structure

全地幔结构地震与动力联合反演

• 批准号: 9317176
• 负责人: Jason Phipps Morgan
• 金额: $ 5万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-06-01 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9317176&HistoricalAwards=false
• 关键词: Joint; Seismic; Geodynamic; Inversion; Whole

9317176 Phipps Morgan The PI will develop simple model descriptions of large-scale lateral viscosity variation near the top of the mantle, and develop simple and computationally efficient theories to treat mantle rheologies where the mantle viscosity is radially dependent except for significant lateral variation near the top. Since this is likely to be the largest lateral viscosity variation in the mantle, by exploring these effects, one can better understand the coupling between lateral viscosity variations, mantle flow and the geoid. These models will make it possible to assess the dynamical effects of the distribution of (strong) continental cratons and (weaker) sub-oceanic asthenosphere on mantle flow. In addition, these models will provide useful benchmarks to guide us in the development of a 3-D spherical, variable viscosity convection code. ****

9317176 PHIPPS MORGAN PI将开发简单的模型描述，对地幔顶部附近的大规模横向粘度变化，并发展出简单且计算上有效的理论，以处理地幔粘度在层状粘度上是径向依赖的，除了在顶部附近的横向变化显着。 由于这可能是地幔中最大的侧向粘度变化，因此可以通过探索这些效果，因此可以更好地理解侧向粘度变化，地幔流量和地质的耦合。 这些模型将有可能评估（强）大陆摇杆的分布和（较弱的）亚海洋运动圈对地幔流的分布的动态影响。 此外，这些模型将提供有用的基准测试，以指导我们开发3-D球形，可变的粘度对流代码。 ****