Tomographic Imaging of the Earth's Deep Interior and Implications for Mantle Flow Models

这项研究包括改进的地幔层析成像，以便对俯冲岩石圈板块进行系统的研究。层析成像将与板块构造重建和流体动力学模拟相结合。先前的工作包括重新处理国际地震中心的整个目录，包括非线性震源重新定位和阶段重新确定；这导致数据质量相对于以前在全球旅行时间断层扫描中使用的数据质量得到改善。目前的项目将利用这些数据进行高分辨率区域模型和整体地幔模型的全球成像。主要目标是建立具有足够分辨率的地震速度模型，以便系统地研究世界范围内的岩石圈板块，特别是整个下地幔板块的渗透深度。得到的速度模型将在数值流动模拟和板块运动历史的背景下进行测试。＊＊＊

9628087 Van Der Hilst This research involves improved tomographic imaging of the Earth's mantle to enable a systematic study of subducting lithospheric slabs. The tomographic imaging is to be integrated with plate tectonic reconstructions and fluid dynamical modeling. Prior work included reprocessing of the entire catalogue of the International Seismological Centre, including non-linear hypocenter relocation and phase re-identification; this has resulted in a data quality that is improved relative to that used previously in global travel-time tomography. The current project will use this data for the global imaging for both high-resolution regional models and whole mantle models. The primary goal is to produce seismic velocity models with sufficient resolution for a systematic investigation of lithospheric slabs world wide, in particular the depth of penetration of the slabs throughout the lower mantle. The resulting velocity models will then be tested in the context of numerical flow simulations and the history of plate motions. ***