Ridge-like lower mantle structure beneath South Africa

@inproceedings{Ni2003RidgelikeLM,
  title={Ridge-like lower mantle structure beneath South Africa},
  author={Sidao Ni and Donald V. Helmberger},
  year={2003}
}
Recent (ScS-S) results from probing the deep structure beneath southern Africa display strong delays of up to 10 s at distances beyond 90°. Such delays could be explained by long-period tomographic models containing smooth (weak) features with the addition of rough (strong) D″ structure (3–9% drops in shear velocities). However, these structures cannot explain the (SKS-S) differentials sampling the same region. To explain the (SKS-S) and (ScS-S) data sets simultaneously requires instead a large… CONTINUE READING

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