Seismic Structure and Tectonics of Oceanic Lithosphere and Upper Mantle

本研究的目的是对洋中脊、岩石圈和软流圈的热机制和动力学进行地震学研究。应力状态将通过地震的震源机制来研究。海洋结构的横向非均质性将通过S波、SS波和p波传播时间的研究来确定。目的是了解地震活动性和震源特征与海洋岩石圈热力学结构的关系，确定海洋下岩石圈和软流圈的三维地震结构，并将这两种观测类型与海底扩张和地幔对流过程的具体模型联系起来。

This research is to do seismological studies of the thermal regime and dynamics of mid-ocean ridges and oceanic lithosphere and asthenosphere. The state of stress will be investigated by means of source mechanisms of earthquakes. Lateral heterogeneity of oceanic structure will be determined from studies of S, SS, and P-wave travel times. The objectives are to understand the relation of earthquake seismicity and source characteristics to the thermal and mechanical structure of oceanic lithosphere, to determine the 3-D seismic structure of the lithosphere and asthenosphere beneath the oceans, and to relate both types of observations to specific models for the processes of seafloor spreading and mantle convection.