Scale and Mechanism of Lateral Heterogeneity in the Oceanic Upper Mantle

大洋上地幔横向非均质性的规模和机制

• 批准号: 9204553
• 负责人: Anne Sheehan
• 金额: --
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1992-10-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9204553&HistoricalAwards=false
• 关键词: Scale; Mechanism; Lateral; Heterogeneity; Oceanic

This research is to study the extent and mechanism of lateral heterogeneity in the oceanic upper mantle. The method of analysis will be joint inversion of seismic wave travel times, geoid, and bathymetry anomalies to determine upper mantle temperature and/or compositional variations. It is intended to attempt to distinguish between the competing models of thermal and compositional mechanisms for lateral heterogeneity on a regional (500-5000 km) scale in the vicinity of mid-ocean ridges and mid-plate swells. The initial effort will be to incorporate surface wave data into the joint inversion and apply the technique to the East Pacific Rise region.

本研究旨在探讨侧位的程度和机制， 海洋上地幔的不均匀性。 的方法 分析将是地震波传播时间的联合反演， 大地水准面和测深异常来确定上地幔 温度和/或组成变化。 其旨在 试图区分热的竞争模型， 和成分机制的横向异质性上， 大洋中脊附近区域（500- 5 000公里）尺度 中板块膨胀 最初的努力将是纳入 面波资料进行联合反演， 东太平洋海隆地区的技术。