Heat-flow constraints on the West African lithosphere structure

Details Heat-flow constraints on the West African lithosphere structure Heat-flow constraints on the West African lithosphere structure

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19..561l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, March 20, 1992, p. 561-564. Research supported by INSU.

Physics

9

Earth Crust, Earth Planetary Structure, Gravity Anomalies, Heat Transfer, Lithosphere, P Waves, Africa, Earth Mantle, Geodynamics, Gravitational Effects, Heat Transmission, Seismic Waves

Scientific paper

Heat production measurements from the West-African shield have been compiled using various samples of crustal rocks. There is no clear indication for a systematic variation of heat production with age which could explain the regional heat flow density (HFD) variations by corresponding variations of the crustal component. HFD values are positively correlated with the P-wave travel time residuals deduced from teleseismic observations and negatively correlated with gravity isostatic anomalies. It is proposed that regional HFD variations are significative of change in the upper mantle structure.

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