Seismic Structure and Tectonics of Oceanic Lithosphere and Upper Mantle

大洋岩石圈和上地幔的地震结构和构造

• 批准号: 9004750
• 负责人: Sean Solomon
• 金额: $ 15.88万
• 依托单位: Massachusetts Institute of Technology
• 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: 1990-09-01 至 1993-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004750&HistoricalAwards=false
• 关键词: Seismic; Structure; Tectonics; Oceanic; Lithosphere

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.

这项研究的目的是对大洋中脊、大洋岩石圈和软流圈的热状况和动力学进行地震学研究。 将通过地震震源机制来研究应力状态。 海洋结构的横向非均质性将通过对 S、SS 和 P 波传播时间的研究来确定。 目标是了解地震活动性和震源特征与海洋岩石圈热结构和机械结构的关系，确定海洋下方岩石圈和软流圈的 3-D 地震结构，并将两种类型的观测结果与特定模型联系起来用于海底扩张和地幔对流过程。