Existence de deux séries tholéiitiques distinctes parmi les dolérites du Protérozoïque supérieur de la boutonnière d'Irherm (Anti-Atlas occidental, Maroc)
Identifieur interne : 000C99 ( Main/Exploration ); précédent : 000C98; suivant : 000D00Existence de deux séries tholéiitiques distinctes parmi les dolérites du Protérozoïque supérieur de la boutonnière d'Irherm (Anti-Atlas occidental, Maroc)
Auteurs : Ahmid Hafid [Maroc] ; Jean-Paul Sagon [France] ; Michel Fonteilles [France] ; Jacques Moutte [France]Source :
- Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science [ 1251-8050 ] ; 1998.
Descripteurs français
- Wicri :
- geographic : Maroc.
English descriptors
- KwdEn :
Abstract
Abstract: During Upper Proterozoic times, the Irherm inlier was intersected by NE-SW doleritic dikes. These dolerites are strongly altered. The primary association included plagioclase, micropegmatite, pyrox- ene, hornblende (ferro-edenite), ilmenite and apatite. Taking only into account the contents of elements which appear generally as inert in alteration phenomena, these dolerites have a composition of continental tholeiites. Two groups may be distinguished according to Ti, Fe, Co, V. Ni contents, which are higher in the first one (group A) than in the other one (group B). This tholeiitic magmatism in the Irherm inlier is in agreement with distension which occurred in the whole Anti-Atlas at Upper Proterozoic.
Url:
DOI: 10.1016/S1251-8050(97)83199-0
Affiliations:
- France, Maroc
- Auvergne-Rhône-Alpes, Rhône-Alpes, Île-de-France
- Paris, Saint-Étienne
- Université Pierre-et-Marie-Curie
Links toward previous steps (curation, corpus...)
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- to stream Istex, to step Checkpoint: 000693
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Le document en format XML
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These dolerites are strongly altered. The primary association included plagioclase, micropegmatite, pyrox- ene, hornblende (ferro-edenite), ilmenite and apatite. Taking only into account the contents of elements which appear generally as inert in alteration phenomena, these dolerites have a composition of continental tholeiites. Two groups may be distinguished according to Ti, Fe, Co, V. Ni contents, which are higher in the first one (group A) than in the other one (group B). 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