A narrow, mid-mantle plume below southern Africa
Article first published online: 4 MAY 2010
Copyright 2010 by the American Geophysical Union.
Geophysical Research Letters
Volume 37, Issue 9, May 2010
How to Cite
2010), A narrow, mid-mantle plume below southern Africa, Geophys. Res. Lett., 37, L09302, doi:10.1029/2009GL042339., , and (
- Issue published online: 4 MAY 2010
- Article first published online: 4 MAY 2010
- Manuscript Accepted: 29 MAR 2010
- Manuscript Revised: 16 MAR 2010
- Manuscript Received: 29 DEC 2009
 New waveform tomographic evidence displays a narrow plume-like feature emitting from the top of the large African low-velocity structure in the lower mantle. A detailed SKS wavefield is assembled for a segment along the structure's southern edge by combining multiple events recorded by a seismic array in the Kaapvaal region of southern Africa. With a new processing technique that emphases multi-pathing, we locate a relatively jagged, sloping wall 1000 km high with low velocities near it's basal edge. Forward modeling indicates that the plume's diameter is less than 150 km and consistent with an iso-chemical, low-viscosity plume conduit.