Constraints on Subduction Zone and Mantle Structures from Seismic Traveltimes and Waveforms

9317300周本研究将继续对俯冲带和地幔周围的地震构造进行约束。主要目标是：(1)通过行时反演和波形建模的联合分析，对俯冲板块的性质有新的认识；(2)首次利用全三维射线追踪技术进行全地幔反演，绘制地幔结构图。研究结果将涉及俯冲板块的穿透深度、地震波的分辨率、地幔非均质性随深度变化的主要特征，以及在层析反演中包含三维射线追踪的重要性。＊＊＊

9317300 Zhou This research will continue work to constrain seismic structures around subduction zones and the mantle. The major objectives are: (1) to gain new insight into the nature of subducted slabs through a joint analysis of traveltime inversions and waveform modeling; and (2) to map the mantle structure by conducting, for the first time, whole mantle inversions with full 3D ray tracing. The results will address the depth of penetration of the subducted slab, the resolving power of seismic waveforms, the dominant characteristics of mantle heterogeneities as a function of depth, and the importance of inclusion of 3D ray tracing in tomographic inversions. ***