eng Science and Education Publishing Journal of Geosciences and Geomatics 2373-6704 2025-07-14 13 2 31 43 10.12691/jgg-13-2-1 JGG20251321 article MVODO Hermine 1 NGA ESSOMBA TSOUNGUI Philom¨¨ne Estelle 2 KOUANKAP NONO Gus Djibril kouankap@yahoo.fr 3 KAMGUIA WOGUIA Brice 4 SIMO Pascal 4 Departement of Geosciences and Environnement, University of Ebolowa, P.O.Box 118 Ebolowa, Cameroon Department of Mining Engineering and Mineral Processing, National Advanced School of Mines and Petroleum Industries, University of Maroua, P.O.Box 46 Maroua, Cameroon Department of Geology, HTTC, University of Bamenda, P.O.Box 39 Bambili; Bamenda, Cameroon Laboratory of Petrology and Structural Geology, University of Yaound¨¦ I, PO Box 3412 Messa-Yaound¨¦, Cameroon The Banefo-Mvoutsaha area lies along the Central Cameroon Shear Zone and belongs to the Central Domain of the Pan-African Fold Belt in Cameroon. The amphibolites of the study area are of two types: The banded amphibolites which are associated with migmatites and composed of Hbl + Bt + Qtz + Kfs + Pl ± Grt + Op; and the massive amphibolites which outcrops as discontinuous bands within the garnet bearing-gneisses; its mineral assemblage is made up of Hbl + Qtz + Kfs ± Grt ± Op. The studied amphibolites are ortho-derived, their SiO2 contents range from 48 to 52 wt%, they are enriched in LREEs and LILEs relatively to HREE, and display negative Eu anomalies (0.65 ¡Ü Eu/Eu* ¡Ü 0.96), characteristics of alkali basaltic rocks, which belong to intraplate tholeiitic series. The banded amphibolites samples yield an Ar-Ar age of 618.14 ± 11.43 Ma, while the massive amphibolites samples ages are 547.50 ± 3.15 Ma. The 618 Ma age coincide with the emplacement age of granitoids that intruded the metamorphic basement of the area. The age of 547.50 ± 3.15 Ma is correlated to amphibolitic metamorphism events that mark the end of the Pan-African orogeny in the study area. These new Ar-Ar ages therefore point out at least two phases of amphibolitic metamorphism in the Central domain of the Pan-African Fold Belt in Cameroon. https://pubs.sciepub.com/jgg/13/2/1/jgg-13-2-1.pdf Pan-African Amphibolite Tholeiites series Intraplate basalts Argon-Argon