Figure 6. Ternary Fe-Mn-Al plot showing hydrothermal and non-hydrothermal fields for modern marine ferromanganese deposits [48].

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