A palaeomagnetic study of lower Proterozoic granites from Western Kenya

Abstract

This paper reports a palaeomagnetic study of the lower Proterozoic granites, exposed in the western part of Kenya and dated at 2530 ± 50 Ma (λRb= 1.39 × 10−11 yr−1). Ten sites out of 13 have yielded stable palaeomagnetic directions which are believed to be primary. Polished section and thermomagnetic analyses indicate titanomagnetite grains as the main carrier of the primary component of the natural remanence. The mean palaeomagnetic north pole is calculated at 210.7° E, 60.9° N with A95= 13.5°.