Alkaline Rocks and Carbonatites of the World

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Morocco

Morocco

Alkaline rocks occur in two principal zones in Morocco: a northern zone of east-northeast - west-southwest trend which extends across the Middle Atlas and a parallel, southern, less extensive one which lies south of the High Atlas mountains. Both zones comprise a number of provinces or centres but, apart from the Azrou area, they are characterised by numerous widely scattered volcanic edifices, dykes and plugs. There is no overall review of the petrology of these rocks but there are general accounts giving the petrography of rocks of individual centres notably by Termier (1936), Jérémine (1955) and Cherotzky (1970). The broad range of highly alkaline suites represented, including basanitic, nephelinitic, phonolitic and comenditic rocks, would suggest the desirability of a full study of the province. Numerous unpublished theses are cited in the more recent publications but these have not been consulted.
The Tamazert complex of carbonatite, pyroxenite and nepheline syenite is located in the High Atlas, having been emplaced in a thrust plane within the core of a large anticlinal structure. Such a tectonic setting is most unusual for a carbonatite complex; it is also noteworthy for the abundance of dykes, of a broad range of compositions, and pegmatite minerals.

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith