Intervention of carbonate components in petrogenesis of the pyroxene nephelinites from the Jbel Saghro (Anti-Atlas, Morocco)

Détails

ID Serval
serval:BIB_B6ADF1695725
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Intervention of carbonate components in petrogenesis of the pyroxene nephelinites from the Jbel Saghro (Anti-Atlas, Morocco)
Périodique
Bulletin de la Société Géologique de France
Auteur⸱e⸱s
Ibhi A., Nachit H., Abia E.H., Hernandez J.
ISSN-L
0037-9409
Statut éditorial
Publié
Date de publication
2002
Peer-reviewed
Oui
Volume
173
Pages
37-43
Langue
anglais
Notes
ISI:000173819300005
Résumé
The Jbel Saghro alkaline complex was emplaced close to the eastern edge
of the Moroccan Anti-Atlas. Within the northern part, two types of
nephelinite were recognized [Ibhi and Nachit, 1999 and lbhi, 2000].
The first type (olivine-rich nephelinite) constitutes the main volcanic
mass south of the Bou Gafer granit (fig. 1), where the volcanism had
been active at least during 2 Ma, between 9.6 and 7.5 +/- 0.1 Ma
[Berrahma et al., 1993]. The second group outcrops in the north (Foum
El Kouss). It consists of pyroxene nephelinites which are younger (2.9
+/- 0.1 Ma) [Berrahma et al., 1993], and bears carbonatitic xenoliths,
melteigitic pyroxenites and metasomatised peridotite xenoliths.
Geochemically, the pyroxene nephelinite is highly enriched in LILE
compared with the first one. The mineralogical and geochemical
characteristics may be explained by the incorporation of carbonatitic
and melteigitic pyroxenite segregates of carbonatitic affinity.
Création de la notice
11/12/2012 15:25
Dernière modification de la notice
20/08/2019 15:24
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