Abstract
Abstract Eighteen new heat flow determinations in shallow boreholes (100–230 m) at three sites in West Africa (Mauritania) are presented. The first site is located in the Archaean province (Reguibat shield) of the West African craton. Temperature measurements were performed in iron formation and needed correction for refraction. The average value is 50 mW m−2 and radioactive element distribution in surface rocks provides an upper crust heat contribution of 1.8 μW m−3. The second site, located near the craton margin, and the third site, located in the Senegal coastal basin, display a slightly higher value of 59 mW m−2.
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