Alkaline Rocks and Carbonatites of the World

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Oujda Area (Zekkara, Beni Oukil)

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Occurrence number: 
113-00-001
Country: 
Morocco
Location: 
Longitude: -2.07, Latitude: 34.52

To the north of Oujda there are extensive areas of basaltic rocks and to the south similar rocks occur but of more restricted extent. Amongst the basaltic rocks are analcime- and nepheline-bearing varieties. These are generally augite- and olivine-phyric rocks with feldspar, analcime, iron oxides and glass; biotite is relatively common and brown amphibole may occur. The analcime may form euhedral crystals with rings of inclusions. Nepheline is confined to the groundmass and may be included in analcime. Nosean or hauyne have been identified by Jérémine and Lucas (1950). Rock analyses will be found in Cherotzky (1977) and Jérémine and Lucas (1950); the latter paper also has photomicrographs.

References: 
CHEROTZKY, G. 1977. Etude des roches éruptives grenues et des vulcanites basiques du Massif des Zekkara (Maroc oriental). Mines et Géologie. Royaume du Maroc, Ministere de l'Energie et des Mines. Rabat, 42: 7-18.JÉRÉMINE , E. and LUCAS, G. 1950. Note sur quelques roches volcaniques de la région d'Oujda (Maroc oriental). Bulletin Volcanologique, Ser. 2. 10: 131-40.
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