Whole mantle SH velocity model constrained by waveform inversion based on three-dimensional Born kernels
Whole mantle SH velocity model constrained by waveform inversion based on three-dimensional Born kernels
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DOI：
10.1111/j.1365-246x.2007.03405.x
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发表时间：
2007-06
影响因子：
2.8
通讯作者：
N. Takeuchi
中科院分区：
文献类型：
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作者：
N. Takeuchi
利用独特的数据集和技术获得了全地幔SH速度模型。体和表面波形，包括主要和多轨道阶段被用作一个数据集，并通过使用3-D玻恩内核反演。SH 18 CE模式揭示了两个主要上升流系统的不同性质：非洲下方的强低速异常从核幔边界（CMB）延伸超过1000 km，而太平洋下方的低速异常仅从CMB延伸300-400 km。研究结果还显示了日本周边670不连续面上停滞板的变化性质：停滞板内最强的高速异常深度逐区不同，这与该地区详细的延迟时间层析成像模型相一致。
SUMMARY A whole mantle SH velocity model is obtained by using a unique data set and techniques. Body and surface waveforms including major and multi-orbit phases are used as a data set and are inverted by using 3-D Born kernels. The resultant model, SH18CE, reveals the different natures of the two major upwelling systems: the strong low velocity anomalies beneath Africa extend for more than 1000 km from the core–mantle boundary (CMB), whereas those beneath the Pacific are restricted to 300–400 km from the CMB. The results also show the variable natures of stagnant slabs on the 670 discontinuity around Japan: the depths of the strongest high velocity anomalies within the stagnant slabs are different region by region, which is consistent with the detailed delay time tomography model in this area.