CSEDI Collaborative Research: Mineral Physics Based Geodynamical Modeling of Anisotropic Structure in the Lowermost Mantle

CSEDI合作研究：基于矿物物理的下地幔各向异性结构地球动力学模型

• 批准号: 9906198
• 负责人: Shun-ichiro Karato
• 金额: $ 10.23万
• 依托单位: University of Minnesota-Twin Cities
• 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: 1999-09-01 至 2001-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9906198&HistoricalAwards=false
• 关键词: CSEDI; Collaborative; Research; Mineral; Physics

9906198Karato The PIs propose a collaborative project to develop a better understanding of the nature of strong and highly variable seismic anisotropy in the D'' layer at the base of Earth's mantle. Observations of anisotropy potentially provide useful constraints on dynamic processes, but fundamental mineral physics issues, such as whether LPO or SPO controls the anisotropy have not been resolved. This project plans to identify the likely physical mechanisms of seismic anisotropy by combining mineral-physics-based geodynamical modeling with seismological observations. This will allow identification of the horizontal and vertical flow geometry in the D" layer, the degree of chemical heterogeneity, and possibly constraints on the distribution and shape of partially molten materials.

9906198KARATO PIS提出了一个协作项目，以更好地理解地球底部的D'层中强，高度可变的地震各向异性的性质。 各向异性的观察可能会在动态过程中提供有用的约束，但是基本的矿物质物理问题，例如LPO或SPO控制各向异性尚未解决。该项目计划通过将基于矿物质的地球动物学模型与地震学观察结合起来来确定地震各向异性的物理机制。这将允许识别D“层，化学异质性的程度以及对部分熔融材料的分布和形状的约束，鉴定了水平和垂直流几何形状。