Abstract
Results of a palaeomagnetic study carried out on the Migori granites exposed in the South Western part of Kenya are presented. The granites of Post-Nyanzian and Post-Kavirondian ages are dated at 2739 ± 111 Ma and 2420 ± 60 Ma , respectively, using the whole rock RbSr isochron method. Alternating frequency and thermal demagnetization techniques have been used to isolate characteristic components of natural remanence. Opaque petrological and thermomagnetic studies indicate titanomagnetite grains as the main carrier of the primary component. The mean palaeomagnetic poles for the Post-Nyanzian and the Post-Kavirondian granites are located at 336°E, 72°N ( δ m = 12°, δ P = 6° ) and 263°E, 41°N ( δ m = 23°, δ P = 15° ), respectively.
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