stripes
Occurrence number:
030-00-028
Country:
Cameroon
Location:
Longitude: 9.72, Latitude: 4.78
Carbonatite:
No
Completely surrounded by basaltic lavas of Manengouba (No. 26), which lies to the north, Mont Koupe consists predominantly of quartz syenites with a little gabbro on the northern margin and minor granite. The syenites consist of abundant quartz, perthite and, in various combinations, arfvedsonite, riebeckite, aegirine and biotite.
Age:
A Rb-Sr whole rock isochron gave 46.4±1 Ma (Lasserre, 1978).
References:
GÈZE, B. 1953. Les volcans du Cameroun occidental. Bulletin Volcanologique, 13: 63-92.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: