Tracing the Sources of Paleoproterozoic Metasediments in the Comoé Basin, Côte d’Ivoire, West Africa : Geochemistry Implication
Koffi Raoul Teha *
Université Félix Houphouët-Boigny Abidjan-Cocody, Laboratoire Ressources Minérale et Energétique (LGRME), UFR STRM, 22 BP 582 Abidjan 22, Côte d’Ivoire.
Koffi Kossonou Jean-Marie Pria
Département des Sciences de la Terre, Université Jean Lorougnon-GUEDE Daloa, Laboratoire Sciences et technologie de l’environnement, UFR Environnement, BP 150 Daloa, Côte d’Ivoire.
Augustin Yao koffi
Université Félix Houphouët-Boigny Abidjan-Cocody, Laboratoire Ressources Minérale et Energétique (LGRME), UFR STRM, 22 BP 582 Abidjan 22, Côte d’Ivoire.
Koffi Joseph Brou
Université Félix Houphouët-Boigny Abidjan-Cocody, Laboratoire Ressources Minérale et Energétique (LGRME), UFR STRM, 22 BP 582 Abidjan 22, Côte d’Ivoire.
Brice Roland Kouassi
Département de Géosciences, Université Péléforo Gon Coulibaly Korhogo, UFR des Sciences Biologiques, BP 1328 Korhogo, Côte d’Ivoire.
Alain Nicaise Kouamelan
Université Félix Houphouët-Boigny Abidjan-Cocody, Laboratoire Ressources Minérale et Energétique (LGRME), UFR STRM, 22 BP 582 Abidjan 22, Côte d’Ivoire.
*Author to whom correspondence should be addressed.
Abstract
Petrology and geochemistry have been used jointly to study the metasediments of the Comoé Basin. The main objective is to identify the sources of the metasediments. The entire Comoé metasedimentary basin is dominated by greywackes and shales. The mineralogy of the greywackes consists of biotite, plagioclase, quartz, muscovite, chlorite, ilmenite and other oxides. The shales contain andalusite, biotite, muscovite, quartz and chlorite. Overall, the geochemistry of the major elements shows an enrichment of Fe2O3, MgO, Al2O3, K2O and TiO2 in the metapelitic rocks. These oxides are controlled by the distribution of phyllosilicates. Observation of diagrams of rare earth elements has shown that the source of these elements in these metasediments for these elements is largely controlled by the TTG. On the other hand, a large quantity of felsic material, in particular felsic rocks, contributed to the composition of the sediments. Mafic rocks contributed to a lesser extent.
Keywords: Côte d’Ivoire, Comoé basin, metasediments, sources, TTG