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Titre : | Caractéristiques d'une caldera ignimbritique, modèle de formation. Cas de la caldera Précambrienne de la région de Kelâa M'Gouna (Saghro, Anti-Atlas) |
Auteurs : | JULIETTE CORNILLE ; PIERRE DE TUDERT |
Type de document : | Mémoire appliqué à la géologie |
Année de publication : | 2009-06-01 00:00:00,000 |
Concepts : |
CALDERA
PRECAMBRIEN |
Résumé : | In the district of kelâa M Gouna(arca of Jbel Saghro south of Moroco) a Precambrian caldera has been identified. The purpose of this study is to characterize this caldera and to come up with a model of formation. The first part consists in going through different types of presently well-known calderas which are listed according to their formation's mode and their shape. At the same time a summary of different kinds of volcanic products which are emitted during eruption is presented. A bibliographical research has been conducted in order to situate this caldera in the geological context. The second part focuses on the geological history of Moroco especially of SAGHRO's mountain. Results of the study about different facies are recorded in the third part. It consists in describing in detail the petrography and the selting iof caldera's facies. A discussion about different possible shapes of the caldera and about its evolution during the formation is conducted. |
Spécialité : | Géologie |
Numéro de promo : | 71 |
numéro MIR : | 456 |