Figure 5. R1-R2 multi-cationic classification diagram for igneous rocks [33]; tn-tonalite; gd-granodiorite; d-diorite, md-monzo-diorite; gr-granite; qm-quartz monzonite; sq-quartz syenite; sd-syeno-diorite, s-syenite, agr-alkali granite.

From

Petrography and Geochemistry of the Somie-Ntem Granitoids (Western Cameroon-Domain): Implication on the Pan-African Evolution of the Central African Fold Belt

Mero Yannah, Juliana Amboh Tifang, Eric Martial Fozing, Yaya Fodoué, Armand Dongmo Kagou, Samuel Ndonyui Ayonghe

Journal of Geosciences and Geomatics. 2019, 7(5), 221-236 doi:10.12691/jgg-7-5-2