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Convection pattern and stress system under the African plateStudies on tectonic forces from satellite-derived gravity data have revealed a subcrustal stress system which provides a unifying mechanism for uplift, depression, rifting, plate motion and ore formation in Africa. The subcrustal stresses are due to mantle convection. Seismicity, volcanicity and kimberlite magmatism in Africa and the development of the African tectonic and magnetic features are explained in terms of this single stress system. The tensional stress fields in the crust exerted by the upwelling mantle flows are shown to be regions of structural kinship characterized by major concentration of mineral deposits. It is probable that the space techniques are capable of detecting and determining the tectonic forces in the crust of Africa.
Document ID
19770066329
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Liu, H.-S.
(NASA Goddard Space Flight Center Geodynamics Branch, Greenbelt, Md., United States)
Date Acquired
August 9, 2013
Publication Date
September 1, 1977
Publication Information
Publication: Physics of the Earth and Planetary Interiors
Volume: 15
Issue: 1, Se
Subject Category
Geophysics
Accession Number
77A49181
Distribution Limits
Public
Copyright
Other

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