Cristallisation fractionnée et contamination crustale dans la série magmatique jurassique transitionnelle du Haut Atlas central (Maroc)Fractional crystallisation and crustal contamination in the transitional Jurassic magmatic series of Central High Atlas (Morocco) |
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| Authors: | Rachid Zayane Abderrahim Essaifi René C Maury Alain Piqué Edgard Laville Mohamed Bouabdelli |
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| Institution: | 1. Département de géologie, B.P. 2390, Faculté des sciences Semlalia, 40000 Marrakech, Maroc;2. UMR 6538 Université de Bretagne occidentale, 6, av. Victor-Le Gorgeu, BP 809, 29285 Brest, France;3. Université de Caen, 14034 Caen, France |
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| Abstract: | The Middle Jurassic plutonism of the Central High Atlas (Morocco) was emplaced in N45° trending anticlinal ridges. It is characterised by various petrographic facies including mafic rocks (troctolites), intermediate rocks (diorites, monzodiorites), and evolved rocks (syenites), together with heterogeneous facies resulting from mixing between acidic and the intermediate magmas. Mineralogical and chemical data show (i) the transitional character of the Jurassic magmatic series of the Central High Atlas and (ii) the implication of continental crust as a contaminant during fractional crystallization. To cite this article: R. Zayane et al., C. R. Geoscience 334 (2002) 97–104. |
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| Keywords: | diorites syenites Jurassic fractional crystallisation crustal contamination Atlas Morocco diorites syénites cristallisation fractionnée contamination crustale Jurassique Atlas Maroc Géomatériaux Geomaterials |
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