Rheological properties of parts of the African lithosphere and their geodynamic significance

Auteur :
ONUOHA, K. M.

Description :
Estimates of viscosity range from about 10 Pa s (i. e. 10 poise) under the East African Rift Valley system to 10 Pa s (on 10 poise) below the West African shield in Niger republic and Sierra Leone. High temperatures, low densities, low viscosities and high stress gradients characterize the East African Rift Valley areas, the Afar triangle, and some of the swells e. g. Tibesti and Jebel Mara. Data from electromagnetic deep soundings, gravity and teleseismic delay time studies are incorporated to present representative models of the lithosphere for the various tectonic regimes of the African continent.


Type de document :
Article de périodique

Source :
Journal of African Earth Sciences Oxford, 1985, vol. 3, n°. 4, p. 437-442, Références bibliographiques : 27 réf.

Date :
1985