Figure 8. Whole-rock (MgO + CaO + MnO)/Fe2O3total versus SiO2/Fe2O3total discrimination diagram [57] depicting the low to medium-grade ore types of the Endengue IFs. Discrimination fields and arrows showing alteration trends including MgO + CaO + MnO-rich (solid arrow) and -poor (dash arrow) stages.

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