Characterization and Detection of Mantle Discontinuities (A Collaborative Effort)

地幔不连续性的表征和检测（共同努力）

• 批准号: 8915712
• 负责人: Timothy Clarke
• 金额: $ 2.49万
• 依托单位: University of Memphis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-05-01 至 1990-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8915712&HistoricalAwards=false
• 关键词: Characterization; Detection; Mantle; Discontinuities; Collaborative

This research is to investigate the transition zone structures in the upper mantle with emphasis on the 400 km and 670 km discontinuity. Recent advances in mineral physics have given a new urgency to the accurate characterization of elastic structure for such boundaries, as well as to the search for other discontinuities. By using broad band seismograms for a number of deep focus earthquakes, and incorporating a suite of reflected and converted phases with varying ray parameters, the work will separate the effects of wave speed and density contrast, as well as measuring sharpness. The results have important implications for global geodynamics and mantle convection, the driving force of the crustal plates.

本研究旨在探讨过渡带构造 上地幔，重点是400公里和670公里 不连续性 矿物物理学的最新进展， 精确描述弹性结构的新的紧迫性 对于这样的边界，以及寻找其他 不连续性 通过使用宽带地震记录， 深源地震，并结合一套反射的 和转换相位与不同的射线参数，工作将 分离波速和密度对比度的影响，以及 来测量锐度。 这些结果具有重要的意义 全球地球动力学和地幔对流的驱动力 地壳板块