The P and S wave velocity structure of the mantle beneath eastern Africa and the African superplume anomaly
Version of Record online: 6 AUG 2013
©2013. American Geophysical Union. All Rights Reserved.
Geochemistry, Geophysics, Geosystems
Volume 14, Issue 8, pages 2696–2715, August 2013
How to Cite
2013), The P and S wave velocity structure of the mantle beneath eastern Africa and the African superplume anomaly, Geochem. Geophys. Geosyst., 14, 2696–2715, doi:10.1002/ggge.20150., and (
- Issue online: 24 SEP 2013
- Version of Record online: 6 AUG 2013
- Accepted manuscript online: 12 JUN 2013 12:00AM EST
- Manuscript Accepted: 12 APR 2013
- Manuscript Revised: 4 APR 2013
- Manuscript Received: 20 FEB 2013
- the National Science Foundation . Grant Numbers: OISE-0530062 , EAR-0440032 , EAR-0824781
Additional Supporting Information may be found in the online version of this article.
Supporting Information Figure S1a. P-wave arrival time delays plotted against back azimuths and great circle distances for events recorded on collocated stations between various networks; (a) GOMA and KGMA, (b) INZA and UVZA, (c) LONG and MAUS, (d) PAND and MBEY, (e) KMBO2002 and KMBO2010.
Supporting Information Figure S1b. S-wave arrival time delays plotted against back azimuths and great circle distances for events recorded on co-located stations between various networks; (a) GOMA and KGMA, (b) INZA and UVZA, (c) LONG and MAUS, (d) PAND and MBEY, (e) KMBO2002 and KMBO2010.
Supporting Information Figure S2. Histograms of relative arrival time residuals for (a) P-waves and (b) S-waves.
Supporting Information Figure S3. 3D model space representation of the knot locations used in this study. The red box (1000-100 km depths, −20-4¡ latitude, 25-42¡ longitude) with the smallest knots spacing defines the region where the highest resolution is expected. Geological features are the same as in Figure 2.
Supporting Information Figure S4. Trade-off between relative arrival-time residual reduction (data fitting) and model roughness for P-wave (top) and S-wave (bottom) inversion velocity model. The red symbols correspond to combinations of flattening and smoothing parameters tested, with the blue circle indicating the optimum parameters used for the final tomography models. These values were selected to balance reasonable RMS travel time residual reductions with realistic model roughness values.
Supporting Information Figure S5. Horizontal cross-sections sliced through (a-c) the P-wave velocity model (d-f) the S-wave velocity model at 700, 800 and 900 km depths. Areas with hit counts of < 5 are darkened. Black squares represent station locations and the East African Rift is shown with bold black lines. The bold white line shows the outline of the Tanzania Craton.
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