Abstract
We conducted a study of the amphibolites of Itagunmodi-Igun area within the Ilesa Schist Belt to determine their petrochemical affinities and pressure–temperature conditions of formation. The amphibolites of the area are massive and comprise magnesio-hornblende, actinolite, labradorite, albite, and accessory titanite. The major and trace element characteristics revealed that they are ortho-amphibolites with tholeiitic and calc-alkaline affinities, plotting in Within-Plate Basalt field of the Zr versus Zr/Y diagram. Plagioclase-hornblende thermobarometry constrained the temperature of formation of the amphibolites to 450-6870C and pressure of 0.5–4.3 kbar. Further, the average pressure of the formation corresponds to approximately 6.6–7.4 km depth of emplacement for the amphibolite.
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References
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Olajide-Kayode, J., Okunlola, O., Olatunji, A. (2022). Geochemistry and Mineral Chemistry of Amphibolites in Parts of the Proterozoic Ilesa Schist Belt, Southwestern Nigeria. In: Çiner, A., et al. Recent Research on Geomorphology, Sedimentology, Marine Geosciences and Geochemistry. CAJG 2019. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-030-72547-1_71
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DOI: https://doi.org/10.1007/978-3-030-72547-1_71
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