Alkaline Rocks and Carbonatites of the World

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Occurrence number: 
Burkina Faso
Longitude: -1.47, Latitude: 12.92

Several kilometres south of Yabo an area of about 13x8 km is underlain by syntectonic aegirine-augite-bearing gneiss. The rock consists of equal amounts of microcline and albite, abundant quartz and aegirine-augite. A modal and chemical analysis will be found in Ducellier (1963).

DUCELLIER, J. 1963. Contribution a l'étude des formations cristallines et métamorphiques du centre et du nord de la Haute-Volta. Mémoires du Bureau de Recherches Géologiques et Minières, Paris, 10: 1-320.
Fig. 3_22 Yabo, Sadba, Ouin and Zoungou. Other post-tectonic, non-alkaline granites are also shown (after Ducellier, 1963, Carte Ouagadougou Sud).
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