Alkaline Rocks and Carbonatites of the World

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Kokoumi (Koukoumi)

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Occurrence number: 
029-00-008
Country: 
Cameroon
Location: 
Longitude: 13.15, Latitude: 9.17

Lying within the Goroua field of trachyte plugs (No. 7) Kokoumi is a 1.5x2 km volcanic crater-like body the centre of which consists of gabboic rocks and the flanks of riebeckite syenite. The gabbro contains a brown amphibole and alkali feldspar.

References: 
KOCH, P. 1959a. Notice explicative sur la feuille Garoua-Ouest. Carte Geologique de Reconnaissance à l'échelle du 1/500,000. (O52) République du Cameroun. Paris.LASSERRE, M. 1978. Mise au point sur les granitoides dits "ultimes" du Cameroun: gisement, pétrographie et géochronologie. Bulletin du Bureau de Recherches Géologiques et Minières. Paris, IV: 143-59.
Location: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith