Figure 7. Plot of K2O/Na2O vs. SiO2 (boundaries modified after 22)

From

Petrogenesis and Tectonic Setting of the Basement Rocks around Irruan Area, Bamenda Massif, SE Nigeria

Ominigbo O. E., Ukwang E. E., Okumoko J. P., Ukpai U. J.

Journal of Geosciences and Geomatics. 2020, 8(1), 35-44 doi:10.12691/jgg-8-1-5