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 | Thickness (km) | Heat production (low) (µW m−3) | Heat production (high) (µW m−3) | Heat production (average) (µW m−3) | Heat flow contribution (low) (mWm−2) | Heat flow contribution (high) (mWm−2) | Heat flow contribution (average) (mWm−2) | References |
---|---|---|---|---|---|---|---|---|
Upper crust (Fang) | 10a | 3.38 | 4.87 | 3.75 | 33.8 | 48.7 | 37.5 | (1) |
Lower crust | 25b | 0.10 | 1.30 | 0.68 | 2.5 | 32.5 | 17.0 | (2) |
Mantle lithosphere | 90 | 0.00 | 0.02 | 0.01 | 0.0 | 1.4 | 0.9 | (3) |
Top of asthenosphere | Â | Â | Â | Â | 12.0 | 27.0 | 20.0 | (3) |
Total estimated surface heat flow (mW m−2) | 48.3 | 109.6 | 75.4 |  |