CSEDI: Causes and Consequences of Mantle Heterogeneity

CSEDI：地幔异质性的原因和后果

• 批准号: 0079980
• 负责人: Carolina Lithgow-Bertelloni
• 金额: $ 6万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-15 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0079980&HistoricalAwards=false
• 关键词: CSEDI; Causes; Consequences; Mantle; Heterogeneity

Lithgow-Bertelloni 0079980 The investigators propose to develop joint, self-consistent dynamical-thermodynamical models of the mantle that incorporate the complex thermodynamic description of multi-component mantle assemblages. Their approach will allow them to assess on an equal footing the three distinct causes of lateral heterogeneity in the earth's mantle: lateral variations in 1) temperature, 2) bulk composition, and 3) phase assemblage. Specifically, they plan to build on a previously developed formulation that includes complete thermodynamic information regarding the dependence of material properties on pressure and temperature in realistic multi-component systems. They can then incorporate the thermodynamic description into instantaneous flow calculations to examine the effects of phase transformations and bulk composition on geoid anomalies, dynamic topography, plate motions and mantle flow.

Lithgow-Berelloni 0079980研究人员建议开发联合的、自洽的地幔动力学-热力学模型，其中包括对多组分地幔组合的复杂热力学描述。他们的方法将使他们能够在平等的基础上评估导致地幔横向不均匀的三个不同原因：1)温度的横向变化，2)主体成分，3)相组合。具体地说，他们计划建立在先前开发的配方的基础上，该配方包括关于现实中多组分系统中材料性质对压力和温度的依赖关系的完整热力学信息。然后，他们可以将热力学描述结合到瞬时流动计算中，以检查相变和主体成分对大地水准面异常、动态地形、板块运动和地幔流动的影响。