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Research Article Open access CC BY 4.0

Tracing the Sources of Paleoproterozoic Metasediments in the Comoé Basin, Côte d’Ivoire, West Africa : Geochemistry Implication

Koffi Raoul Teha, Koffi Kossonou Jean-Marie Pria, Augustin Yao koffi, Koffi Joseph Brou, Brice Roland Kouassi, Alain Nicaise Kouamelan

Journal of Geography, Environment and Earth Science International · pp. 113–129 · Published 17 Oct 2023

10.9734/jgeesi/2023/v27i10720

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.

Côte d’Ivoire Comoé basin metasediments sources TTG

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