Laboratoire de Géologie du Socle et de Métallogénie, UFR Sciences de la Terre et des ressources Minières, Université Félix Houphouët-Boigny Abidjan-Cocody, UFR STRM, 22 BP 582 Abidjan 22, Côte d’Ivoire
The northern zone of Bouaflé is located in the central part of the Bouaflé furrow, in the center of Côte d’Ivoire. This zone being highly lateritized, as in all tropical climate zones, a mapping from the regolith with a view to improving knowledge of the geology of the central part of the Bouaflé furrow was initiated. It was done using remote sensing and survey data carried out in the area. Thus, it emerges from this study that the regolith of the study area comes from the supergene alteration of the various geological formations observed and is characterized by a deep alteration profile with an average thickness of approximately 30 m with a spatial distribution of relict regolith, erosion, deposition as well as surfaces affected by widespread lateritization.
Our study area in southwestern Côte d’Ivoire in SASCA domain is part of the Archean-Paleoproterozoic transition zone and consists mainly of metasediments, grey gneisses, metabasites and granitoids. We present new data on the petrographic characterization and origin of metasediments in this area. Both field and petrographic observations indicate that metasediments consist of garnet-sillimanite-cordierite paragneisses and staurolite and/or garnet mica schists. The major elements made it possible to constrain the origin of these metasediments by showing: (i) their belonging to the group of iron-rich shales in majority and secondarily to the Fe-rich sandstones, (ii) their provenance from basalt and andesitic rocks moderately weathered (60
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