Alkaline Rocks and Carbonatites of the World

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Ouin (Petite Suisse)

stripes

Occurrence number: 
027-00-003
Country: 
Burkina Faso
Location: 
Longitude: -1, Latitude: 12.33

This 17x7 km intrusion of peralkaline syenite is emplaced in basement migmatites. The rock comprises microcline perthite, albite, aegirine-augite, a little biotite and accessory zircon, apatite, titanite and fluorite. A modal and chemical analysis is in Ducellier (1963, p. 263), this rock apparently containing a little katophorite.

References: 
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.
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