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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
Earth & Planetary Sciences Engineering Environmental Science Physics

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Journal : Journal of Geoscience, Engineering, Environment, and Technology

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Petrography and Geochemistry for Proposal of Geodynamic Model For The Irbiben Granite in Tagragra d’Akka inlier, (western Anti-Atlas, Morocco) Tokpa Kakeu Lionel-Dimitri Boya; Allou Gnanzou; Kouadio Jean Luc Hervé Fossou; Pohn K. Martial Adingra; Dagri David Goulihi; Souad M'Rabet
Journal of Geoscience, Engineering, Environment, and Technology Vol. 7 No. 3 (2022): JGEET Vol 07 No 03 : September (2022)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2022.7.3.10275

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.
Co-Authors Allou Gnanzou Dagri David Goulihi Kouadio Jean Luc Hervé Fossou Souad M'Rabet Tokpa Kakeu Lionel-Dimitri Boya