Modern and ancient geotherms beneath southern Africa

Details Modern and ancient geotherms beneath southern Africa Modern and ancient geotherms beneath southern Africa

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..88..132b&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 88, no. 1-2, April 1988, p. 132-142.

Other

10

Africa, Cratons, Earth Planetary Structure, Geotemperature, Geothermal Anomalies, Heat Budget, Lithosphere, Mathematical Models, Temperature Distribution

Scientific paper

To reconcile evidence indicating that Archean temperatures, both in the crust and the cratonic upper mantle, were not very different from those of the present day with the fact that the total heat loss from the earth must have been substantially higher in the Archean than at present, a multidimensional numerical model was developed for the thermal environment of the Archean craton in southern Africa. According to this model, the extra heat produced deep within the earth in the Archean was diverted away from the cratons by lithospheric roots beneath the cratons and was lost through the oceanic lithosphere, which presumably surrounded the cratonic nuclei in the Archean.

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