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Le Maitre, R.W., Bateman, P., Dudek, A., Keller, J., Lameyre, M., Le Bas, M.J., Sabine, P.A., Schmid, R., Sorensen, H., Streckeisen, A., Woolley, A.R. and Zanettin, B. (1989) A Classification of Igneous Rocks and Glossary of Terms. Recommendations of the IUGS Commission on the Systematics of Igneous Rocks. Blackwell, Oxford, 193 p.

has been cited by the following article:

• TITLE: Petrography and Geochemistry of Baïbokoum-Touboro-Ngaoundaye Granitoids on the Chad-Cameroon-RCA Borders (Adamawa-Yade Domain)

  AUTHORS: Naïmou Seguem, Mbaguedjé Diondoh, Amadou Diguim Kepnamou, Ntoumbé Mama, Mabrouk Sami, Ganwa Alembert Alexandre, Ekodeck Georges Emmanuel

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

  JOURNAL NAME: Open Journal of Geology, Vol.12 No.2, February 24, 2022

  ABSTRACT: 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.