Author(s)

Naïmou Seguem^1*, Mbaguedjé Diondoh¹, Amadou Diguim Kepnamou², Ntoumbé Mama², Mabrouk Sami³, Ganwa Alembert Alexandre^2,4, Ekodeck Georges Emmanuel⁵

¹Department of Geology, Faculty of Sciences and Techniques, University Adam Barka of Abeche, Abeche, Chad.
²Department of Mines and Geology, School of Geology and Mining Engineering, University of Ngaoundere, Meiganga, Cameroon.
³Department of Geology, Faculty of Sciences, Minia University, El-Minia, Egypt.
⁴Department of Earth Sciences, Faculty of Sciences, University of Ngaoundere, Ngaoundere, Cameroon.
⁵Department of Earth Sciences, Faculty of Sciences, University of Yaounde I, Yaounde, Cameroon.

The Baïbokoum-Touboro-Ngaoundaye area is located in the Adamoua-Yade domain of the Pan-African Fold Belt in Central Africa. The present work concerns the petrographic and geochemical study. The study area is made up of plutonic rocks including two amphibole granites, four biotite and muscovite granites, two syenites and one monzonite sample. These rocks have a granular porphyroid texture, with a mylonitic tendency. The primary paragenesis consists of Opx + Cpx + Amp + Bt + Pl + Or + Mic + Qtz + Ap + Sph + Zr and the secondary paragenesis consisting of Ch + Op. Plutonic rocks are shoshonitic to calc-alkaline with a strong potassic affinity. The REE profiles of these rocks show a negative anomaly of Eu in the granites and no Eu anomaly in syenites and monzonite (syeno-diorite). Multielement spectra of plutonic rocks present a negative anomaly in Nb-Ta and Ti. Fractional crystallization is the process that made these rocks of study area. These rocks are placed in a subduction to syn-collisional (VAG + Syn-COLG) and of intraplate granitoids (WPG) environment.

Petrography, Geochemistry, Baïbokoum-Touboro-Ngaoundaye, Adamawa-Yade Domain, Pan-African Fold Belt

Seguem, N. , Diondoh, M. , Kepnamou, A. , Mama, N. , Sami, M. , Alexandre, G. and Emmanuel, E. (2022) Petrography and Geochemistry of Baïbokoum-Touboro-Ngaoundaye Granitoids on the Chad-Cameroon-RCA Borders (Adamawa-Yade Domain). Open Journal of Geology, 12, 136-155. doi: 10.4236/ojg.2022.122007.