Open AccessWhole mantle SH velocity model constrained by waveform inversion based on three‐dimensional Born kernels
Author(s) -
Takeuchi Nozomu
Publication year - 2007
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1111/j.1365-246x.2007.03405.x
Subject(s) - geology , mantle (geology) , upwelling , geophysics , waveform , geodesy , seismic tomography , core–mantle boundary , seismology , physics , oceanography , quantum mechanics , voltage
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.