Petrography and Geochemistry for Proposal of Geodynamic Model For The Irbiben Granite in Tagragra d’Akka inlier, (western Anti-Atlas, Morocco)

Authors

  • Tokpa Kakeu Lionel-Dimitri Boya Geology, Mineral and Energy Resources Laboratory / Training and Research Unit in Earth Sciences and Mineral Ressources, University Félix HOUPHOUËT- BOIGNY, Abidjan Cocody, 22 BP 582 Abidjan 22
  • Allou Gnanzou Geology, Mineral and Energy Resources Laboratory, Training and Research Unit in Earth Sciences and Mineral Ressources, University Félix HOUPHOUËT- BOIGNY, Abidjan Cocody, 22 BP 582 ABIDJAN 22, Côte d’Ivoire
  • Kouadio Jean Luc Hervé Fossou Geology, Mineral and Energy Resources Laboratory, Training and Research Unit in Earth Sciences and Mineral Ressources, University Félix HOUPHOUËT- BOIGNY, Abidjan Cocody, 22 BP 582 ABIDJAN 22, Côte d’Ivoire
  • Pohn K. Martial Adingra Geology, Mineral and Energy Resources Laboratory, Training and Research Unit in Earth Sciences and Mineral Ressources, University Félix HOUPHOUËT- BOIGNY, Abidjan Cocody, 22 BP 582 ABIDJAN 22, Côte d’Ivoire
  • Dagri David Goulihi Geology, Mineral and Energy Resources Laboratory, Training and Research Unit in Earth Sciences and Mineral Ressources, University Félix HOUPHOUËT- BOIGNY, Abidjan Cocody, 22 BP 582 ABIDJAN 22, Côte d’Ivoire
  • Souad M'Rabet Georesources and Environment Laboratory, Faculty of Sciences, Ibn Tofail University of Kenitra, Morocco

DOI:

https://doi.org/10.25299/jgeet.2022.7.3.10275

Keywords:

Petro-geochemistry, Granite, Geodynamic model, Irbiben, Anti-Atlas, Morocco

Abstract

This study aims to contribute to improve the knowledge on the setting of the Irbiben granites, located south of the gold deposit of this locality (Tagragra d'Akka buttonhole, Anti-Atlas, Morocco). The petrographic characterization showed leucocratic porphyry rocks, with a mineralogy dominated by quartz and phenocrysts of plagioclase, alkali feldspars of sometimes centimetric size as well as very small sulphides of metallic luster. Two generations of quartz have been identified: a QIquartz with undulating extinction phenocrysts testifying to an episode of deformation orchestrated in this inlier, and a QII quartz with more rounded and limpid minerals indicating an intense silicification. Plagioclase and alkali feldspars are deeply altered to sericite and epidote. Geochemical characterization classifies these rocks as calc-alkaline series granites, rich in potassium, with a peraluminous character indicating their crustal origin. Their arc geochemical signature, Ba enrichment, and negative Nb, Ti, and P anomalies are characteristic of a subduction zone. This subduction could be associated with an episode of convergence between an oceanic lithosphere located in the north and the West African craton in the south, as shown by the proposed geodynamic model.

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Author Biographies

Allou Gnanzou, Geology, Mineral and Energy Resources Laboratory, Training and Research Unit in Earth Sciences and Mineral Ressources, University Félix HOUPHOUËT- BOIGNY, Abidjan Cocody, 22 BP 582 ABIDJAN 22, Côte d’Ivoire

Co-author

Pohn K. Martial Adingra, Geology, Mineral and Energy Resources Laboratory, Training and Research Unit in Earth Sciences and Mineral Ressources, University Félix HOUPHOUËT- BOIGNY, Abidjan Cocody, 22 BP 582 ABIDJAN 22, Côte d’Ivoire

Co-author

Souad M'Rabet, Georesources and Environment Laboratory, Faculty of Sciences, Ibn Tofail University of Kenitra, Morocco

Co-author

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Published

2022-09-26

Issue

Vol. 7 No. 3 (2022): JGEET Vol 07 No 03 : September (2022)

Section

Research Articles

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