Broadband Seismic Deployments for Imaging the Upper Mantle Structure in the Lützow-Holm Bay Region, East Antarctica
Figure 7
(a) Back azimuth distribution for depth variation in upper mantle discontinuities by receiver function analyses for all GARNET stations. Color images represent the smoothed amplitudes of the receiver functions shown in Figure 6. Two dashed lines are traced for the maximum amplitudes of both 410 km and 660 km depth discontinuities. The two back azimuth groups for strong depth variations in upper mantle discontinuities are circled by the light green open squares. (b) Location of the strong heterogeneous azimuths in LHB. The area for strong depth variations in upper mantle discontinuities is represented by the light green open squares, which are almost parallel with the coastal line. Symbolic notation for the P-S conversion points at the mantle discontinuities are the same as in Figure 5.
