Cenozoic magmatism throughout East Africa resulting from impact of a single plume

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doi: 10.1038/27417
Authors:Ebinger, C. J.; Sleep, N. H.
Author Affiliations:Primary:
Stanford University, Department of Geophysics, Stanford, CA, United States
Other:
University of Leeds, United Kingdom
Volume Title:Nature (London)
Source:Nature (London), 395(6704), p.788-791. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836
Publication Date:1998
Note:In English. 36 refs.; illus., incl. geol. sketch map
Summary:A model is presented and figured of a large single plume impinging beneath the Ethiopian plateau, and incorporates lateral flow and ponding of plume material in pre-existing zones of lithospheric thinning. This single plume explains the distribution and timing of magmatism and uplift throughout East Africa. The thin lithosphere beneath the Mesozoic-Palaeogene rifts and passive margins of Africa and Arabia guides the lateral flow of plume material W to the Cameroon volcanic line (< 31 m.y.) and S to the Comoros Isles (< 10 m.y.). A reconstruction of the African plate at ∼ 45 m.y. ago (before the separation of Africa and Arabia) shows Cainozoic plateaux, swells, rifts and magmatism with maximum ages in each province, the distribution of Mesozoic-Palaeogene rifts, and marine strata along passive margins. [R.K.H.]
Sections:Petrology
Subsections:Igneous petrology
Subjects:Asthenosphere; Basalts; Boundary conditions; Cenozoic; Crust; Crustal thinning; Flood basalts; Hot spots; Igneous rocks; Lithosphere; Magmatism; Mantle; Mantle plumes; Passive margins; Rift zones; Uplifts; Volcanic rocks; Africa; East Africa
Abstract Numbers:99M/2146
Record ID:1998073325
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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