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: 9117406
• 负责人: Jason Phipps Morgan
• 金额: $ 14.12万
• 依托单位: University of California-San Diego
• 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: 1992-04-15 至 1994-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117406&HistoricalAwards=false
• 关键词: Joint; Seismic; Geodynamic; Inversion; Whole

The goals of this project are (1) To better constrain the viscosity and flow structure of the mantle through joint geoid/seismic data fitting, (2) develop a self-consistent inversion scheme for the body wave (S and P), surface wave, and normal mode data that includes in the seismic inversion process the effects due to the boundary deformations induced by any internal density anomalies, and (3) explore the effects of phase transitions and lateral (temperature-dependent) viscosity variations on internal mantle structure and the geoid through 2-D and 3-D numerical experiments and seismic dataset intercomparisons.

该项目的目标是(1)通过联合大地水准面/地震数据拟合，更好地约束地幔的粘性和流动结构；(2)发展体波(S和P)、面波和简正波数据的自洽反演方案，在地震反演过程中考虑任何内部密度异常引起的边界变形的影响，通过二维、三维数值实验和地震资料对比，探讨相变和侧向(随温度变化)粘度变化对地幔内部结构和大地水准面的影响。