Scale and Mechanism of Lateral Heterogeneity in the Oceanic Upper Mantle

本研究旨在研究大洋上地幔横向非均质性的程度和机制。分析的方法将是联合反演地震波传播时间、大地水准面和测深异常，以确定上地幔温度和/或成分变化。它的目的是试图区分在大洋中脊和板块中部隆起附近区域(500-5000公里)尺度上横向非均质性的热机制和组成机制的相互竞争的模式。最初的工作将是将面波数据纳入联合反演，并将该技术应用于东太平洋隆起区。

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.