Volcano spacings and lithospheric attenuation in the Eastern Rift of Africa

Details Volcano spacings and lithospheric attenuation in the Eastern Rift of Africa Volcano spacings and lithospheric attenuation in the Eastern Rift of Africa

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976e%26psl..33..126m&link_type=abstract

Earth and Planetary Science Letters, vol. 33, Nov. 1976, p. 126-144.

Mathematics

Logic

25

Africa, Earth Crust, Geological Faults, Lithosphere, Volcanology, Chemical Composition, Ethiopia, Geological Surveys, Lava, Spacing, Uganda

Scientific paper

The Eastern Rift of Africa runs the gamut of crustal and lithospheric attenuation from undeformed shield through attenuated rift margin to active neo-oceanic spreading zones. It is therefore peculiarly well suited to an examination of relationships between volcano spacings and crust/lithosphere thickness. Although lithospheric thickness is not well known in Eastern Africa, it appears to have direct expression in the surface spacing of volcanoes for any given tectonic regime. This applies whether the volcanoes are essentially basaltic, silicic, or alkaline-carbonatitic. No evidence is found for control of volcano sites by a pre-existing fracture grid in the crust.

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