Mantle transition zone thinning beneath eastern Africa: Evidence for a whole-mantle superplume structure

Gabriel D. Mulibo, Andrew A. Nyblade

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

P to S conversions from the 410 and 660 km discontinuities observed in receiver function stacks reveal a mantle transition zone that is ~30-40 km thinner than the global average in a region ~200-400 km wide extending in a SW-NE direction from central Zambia, across Tanzania and into Kenya. The thinning of the transition zone indicates a ~190-300 K thermal anomaly in the same location where seismic tomography models suggest that the lower mantle African superplume structure connects to thermally perturbed upper mantle beneath eastern Africa. This finding provides compelling evidence for the existence of a continuous thermal structure extending from the core-mantle boundary to the surface associated with the African superplume.

Original languageEnglish (US)
Pages (from-to)3562-3566
Number of pages5
JournalGeophysical Research Letters
Volume40
Issue number14
DOIs
StatePublished - Jul 28 2013

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mantle structure
transition zone
thinning
Earth mantle
mantle
core-mantle boundary
seismic tomography
thermal structure
lower mantle
Zambia
Tanzania
temperature anomaly
Kenya
upper mantle
discontinuity
receivers
tomography
anomalies
Africa
stack

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

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Mantle transition zone thinning beneath eastern Africa : Evidence for a whole-mantle superplume structure. / Mulibo, Gabriel D.; Nyblade, Andrew A.

In: Geophysical Research Letters, Vol. 40, No. 14, 28.07.2013, p. 3562-3566.

Research output: Contribution to journalArticle

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