Figure 4. (a) CaO+MgO-Fe2O3Tot-SiO2 [29] and (b) SiO2-Al2O3-FeO [30] ternary diagrams showing the Precambrian age of the Edengue metamorphosed iron formations.

From

Petrography and Major Element Geochemistry of the Endengue Iron Formations, Ntem Complex, South Cameroon

Robinson Tchatchueng, Habib Dadjo Djamo, Timoléon Ngnotué, Evine Laure Tanko Njiosseu, Mamadou Traoré, Cyriel Moudioh, Hervé Wabo, Cédric Djeutchou, Jean Paul Nzenti

Journal of Geosciences and Geomatics. 2020, 8(1), 15-24 doi:10.12691/jgg-8-1-3