Internal heating and thermal constraints on the mantle

Details Internal heating and thermal constraints on the mantle Internal heating and thermal constraints on the mantle

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16.1407l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, Dec. 1989, p. 1407-1410. Research supported by NSF and NASA.

Physics

46

Earth Core, Earth Mantle, Geotemperature, Heat Flux, Thermal Conductivity, Digital Simulation, Radioactive Decay, Radioactive Isotopes

Scientific paper

Numerical simulations have been carried out to study the average temperature and thermal structure of an internally heated mantle. It is found that in an incompressible mantle the hottest parts are localized in regions of slow flow in the middle and upper mantle, whereas in a compressible mantle they occur over laterally extensive regions near the core-mantle boundary (CMB). For chondritic concentrations of heat-producing elements (hpe's), the average thermal conductivity in the mantle must be high to avoid heating the core, and the temperature of the CMB is low to avoid large-scale melting. The mantle may have been extensively molten in the Archaean.

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