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S. Ashanti and . Ghana, AUTEUR : Stéphane Perrouty TITRE : Évolution Structurale de la Ceinture Minéralisée

R. En-français, La ceinture Paléoprotérozoïque d'Ashanti, au sud-ouest du Ghana, est l'hôte de nombreux gisements d'or, de classe mondiale

T. De, La caractérisation de l'évolution structurale et magmatique régionale permet d'éclaircir le contexte géotectonique de formation de ces gisements et ainsi fournir des pistes pour de futures explorations. Ainsi, au cours de ces travaux de thèse, ont été réalisés : (1) une nouvelle carte géologique et structurale de la région, en accord avec les observations de terrains et les données de géophysique aéroportée) une étude détaillée du gisement d'or précoce de la mine de Wassa, ) une étude de l'évolution du magmatisme au cours de l'Orogénèse Éburnéenne et (4) un modèle tridimensionnel de la ceinture d'Ashanti mettant en évidence un possible contrôle litho-structural sur la localisation des minéralisations