A Toposequential Study of Duricrusts Developed on Granite and Gneiss in Meiganga, Adamawa Region: Understanding Lateritic Formations Assessment in Central Cameroon — Oak Academic Publishing
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A Toposequential Study of Duricrusts Developed on Granite and Gneiss in Meiganga, Adamawa Region: Understanding Lateritic Formations Assessment in Central Cameroon
Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
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Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
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Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
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Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
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Department of Earth Sciences, University of Yaounde 1, Yaounde, Cameroon
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Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
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Department of Biological Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
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Department of Mining Engineering, School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon
1 Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
2 Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
3 Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
4 Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
5 Department of Earth Sciences, University of Yaounde 1, Yaounde, Cameroon
6 Department of Earth Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
7 Department of Biological Sciences, Faculty of Science, University of Ngaoundere, Ngaoundere, Cameroon
8 Department of Mining Engineering, School of Geology and Mining Engineering, University of Ngaoundere, Ngaoundere, Cameroon
This study investigates the toposequential development of duricrusts formed on granite and gneiss in Meiganga, in the Adamawa Region of Central Cameroon. The area lies within a tropical upland characterized by duricrust outcrops. The methodology includes field investigations for duricrusts description and sampling for mineralogically and geochemically characterizations. Eleven samples were collected including six on granite and five on gneiss. Four main facies were identified: nodular and massive at both sites, vacuolar exclusively on granite, and brecciated only on gneiss. The study reveals a toposequential differentiation of the duricrusts with high-altitude positions (1150 m) displaying thick and mature duricrusts enriched in goethite and gibbsite, while mid and lower slope sites (1000 - 1050) show less indurated and kaolinite-rich materials. Geochemically, Fe 2 O 3 , the most important oxide, varied from 28.62% to 78.79%. It is followed by Al 2 O 3 (3.06% - 32.6%). The SiO 2 contents ranged from 0.95% to 22.48%. The alkali and alkaline earth elements are mostly low (0.1%). Most important trace elements identified are Ba (5 - 1191 ppm), V (108 - 1118 ppm) and Zr (9.6 - 529.4 ppm). LREE are more concentrated than HREE: 459.57 ppm and 39.44 ppm for granitic duricrusts; 722.45 ppm and 54.86 ppm for gneissic materials. The high CIA and MIA values (>99) confirm an intense duricrust weathering, leading to clay minerals development through ferruginization, monosialitization, and allitization. These results support a model of lateritic landscape evolution based on topography, lithology, and climatic conditions, which favored the understanding of duricrust processes in general and those of Adamawa region in particular.
KeywordsAdamawa HighlandsMeiganga LocalityDuricrust DevelopmentMineralogical and Geochemical InvestigationsCrystallochemical Phenomena
Tardy, Y. (1993) Pédologie des latérites et des sols tropicaux. Masson, 459 p.
Alexandre, J. (2002) Les cuirasses latéritiques et autres formations ferrugineuses tropicales: Exemple du Haut-Katanga méridional. Annales — Sciences Géologiques , 107, p. 119.
Blot, A. (2004) Caractérisation des chapeaux de fer en milieu latéritique cuirassé. Comptes Rendus. Géoscience , 336, 1473-1480. https://doi.org/10.1016/j.crte.2004.07.008
Likiby, B. (2010) Géochimie et géotechnique des formations superficielles de la ré-gion de Maroua (Nord-Cameroun): Intérêts environnementaux et industriels, Master’s Thesis, Faculté des Sciences—Université de Yaoundé I, 293 p.
Nahon, D., Tardy, Y. and Oliveira, J.M. (1992) Geochemical Evolution of Lateritic Profiles in the Amazon Basin: The Barreiras Croup of Brazil. In: Rose, C.W., Watson, A.J. and Matthews, R.H., Eds., Weathering , Soils and Paleosols , Elsevier, 187-204.
Colin, F., Beauvais, A., Ambrosi, J.P. and Nahon, D. (2004) Les latérites en envi-ronnement tropical, source de métaux d’intérêt économique. Assises de la Recherche Française dans le Pacifique , Nouméa, 24 au 27 août 2004, 103-107. https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers14-02/010051927.pdf
Letouzey, R. (1979) Végétation du Cameroun. In: Laclavère, G., Ed., Atlas de la République Unie du Cameroun , Jeune Afrique, 13-15.
Momo, M.N., Yemefack, M., Tematio, P., Beauvais, A. and Ambrosi, J. (2016) Distribution of Duricrusted Bauxites and Laterites on the Bamiléké Plateau (West Cameroon): Constraints from GIS Mapping and Geochemistry. CATENA , 140, 15-23. https://doi.org/10.1016/j.catena.2016.01.010
Tematio, P., Meli Songmene, S., Leumbe Leumbe, O., Momo Nouazi, M., Yemefack, M. and Yongue-Fouateu, R. (2017) Mapping Bauxite Indices Using Landsat ETM+ Imageries Constrained with Environmental Factors in Foumban Area (West Cameroon). Journal of African Earth Sciences , 129, 806-819.
Zame, P.Z., Assomo, P.S. and Onwualu, J.N. (2017) Assessment of Geotechnical Properties of Lateritic Gravels from South-Cameroon Road Network. International Journal of Geosciences , 8, 949-964. https://doi.org/10.4236/ijg.2017.88054
Sojien, T.M., Mamdem, E.L.T., Wouatong, A.S.L. and Bitom, D.L. (2018) Mineralogical, Geochemical and Distribution Study of Bauxites in the Locality of Bangam and Environs (West Cameroon). Earth Science Research , 7, 117-130. https://doi.org/10.5539/esr.v7n1p117
Ahmadou, A., Ondoa, A.D.B., Sini, A. and Nguetnkam, J.P. (2023) Morphological, Mineralogical and Geochemical Characterization of the Danfili-Mambal Duricrust Formations (Adamawa-Cameroon). Scientific African , 21, e01873. https://doi.org/10.1016/j.sciaf.2023.e01873
Sini, A., Boukari, H., Balla, O.A.D., Beral, D., Awé, S.W., Basga, S.D., et al. (2024) Mobility of Major and Trace Elements during the Bauxitization Processes in Ngaoundal Area (Adamawa Cameroon): Implication on Mining Perspectives. Open Journal of Geology , 14, 81-100. https://doi.org/10.4236/ojg.2024.141005
Sini, A., Basga, S.D., Temga, J.P. and Nguetnkam, J.P. (2020) The Influence of Topography in Duricrust Development in the Ngaoundal-Dir Section of Central Cameroon: Understanding Morphological, Mineralogical and Geochemical Transformations. Scientific African , 10, e00655. https://doi.org/10.1016/j.sciaf.2020.e00655
Nguetnkam, J.P. (2004) Les argiles des Vertisols et des sols fersiallitiques de l’Extrême Nord du Cameroun: genèse, propriétés cristallochimiques et texturales, typologie et application à la décoloration des huiles végétales. Thèse de Doctorat d’État, Université de Yaoundé I, 216 p.
WRB (2022) International Soil Classification System for Naming Soils and Creating Legends for Soil Maps. 4th Edition, International Union of Soil Sciences (IUSS).
Yonkeu, S. (1993) Végétation des pâturages de l’Adamaoua (Cameroun): Écologie et potentialités pastorales. Thèse de Doctorat, Université de Rennes I, 213 p.
Tchameni, R., Pouclet, A., Penaye, J., Ganwa, A.A. and Toteu, S.F. (2006) Petrography and Geochemistry of the Ngaoundéré Pan-African Granitoids in Central North Cameroon: Implications for Their Sources and Geological Setting. Journal of African Earth Sciences , 44, 511-529. https://doi.org/10.1016/j.jafrearsci.2005.11.017
Keutchafo Kouamo, N., Tchatptchet, D.T., Tezanou Ngueguim, A.L., Simeni Wambo, N.A., Tchouankoue, J.P. and Cucciniello, C. (2019) Petrogenesis of Basaltic Dikes from the Manjo Area (Western Cameroon): Insights into the Paleozoic Magmatism at the Northern Margin of the Congo Craton in Cameroon. Arabian Journal of Geosciences , 12, Article No. 281. https://doi.org/10.1007/s12517-019-4424-y
Moreau, C., Regnoult, J., Déruelle, B. and Robineau, B. (1987) A New Tectonic Model for the Cameroon Line, Central Africa. Tectonophysics , 141, 317-334. https://doi.org/10.1016/0040-1951(87)90206-x
Ngounouno, I., Moreau, C., Deruelle, B., Demaiffe, D. and Montigny, R. (2001) Petrologie du complexe alcalin sous-sature de Kokoumi (Cameroun). Bulletin de la Société Géologique de France , 172, 675-686. https://doi.org/10.2113/172.6.675
McDonough, W.F. and Sun, S. (1995) The Composition of the Earth. Che mical Geology , 120, 223-253. https://doi.org/10.1016/0009-2541(94)00140-4
Nesbitt, H.W. and Young, G.M. (1982) Early Proterozoic Climates and Plate Motions Inferred from Major Element Chemistry of Lutites. Nature , 299, 715-717. https://doi.org/10.1038/299715a0
Price, J.R. and Velbel, M.A. (2003) Chemical Weathering Indices Applied to Weathering Profiles Developed on Heterogeneous Felsic Metamorphic Parent Rocks. Chemical Geology , 202, 397-416. https://doi.org/10.1016/j.chemgeo.2002.11.001
Martins, R. (2024) Genèse et évolution des cuirasses ferrugineuses dans la for-mation Barreiras, marge sud-est du Brésil. Thèse de doctorat, Sorbonne Université en cotutelle avec Universidade Federal de Ouro Preto, École doctorale Géosciences, ressources naturelles et environnement.
Nouazi Momo, M., Beauvais, A., Tematio, P., Ambrosi, J., Yemefack, M., Yerima, B.P.K., et al. (2019) Lateritic Weathering of Trachyte, and Bauxite Formation in West Cameroon: Morphological and Geochemical Evolution. Journal of Geochemical Exploration , 205, Article ID: 106324. https://doi.org/10.1016/j.gexplo.2019.06.006
Boeva, N., Bortnikov, N., Slukin, A., Shipilova, E., Makarova, M. and Melnikov, P. (2021) Biofilms and Biominerals in the Lateritic Weathering Crust as Exemplified by the Central Bauxite Deposit (Siberian Platform, Russia). Minerals , 11, Article 1184. https://doi.org/10.3390/min11111184
Boulange, B., Ambrosi, J. and Nahon, D. (1997) Laterites and Bauxites. In: Boulange, B., Ambrosi, J. and Nahon, D., Eds., Soils and Sediments , Springer, 49-65. https://doi.org/10.1007/978-3-642-60525-3_3
Dixon, J.C. and McLaren, S.J. (2009) Duricrusts. In: Parsons, A.J. and Abrahams, A.D., Eds., Geomorphology of Desert Environments , Springer, 123-151. https://doi.org/10.1007/978-1-4020-5719-9_6
Bitom, D. and Volkoff, B. (1993) Altération déferruginisante des cuirasses massives et formation des horizons gravillonnaires ferrugineux dans les sols de l’Afrique Cen-trale humide. Comptes Rendus de l ’ Académie des Sciences de Paris , Série II , 316, 1447-1454.
Fenske, C., Braun, J., Guillocheau, F. and Robin, C. (2022) Models of Duricrust Formation in Tropical and Subtropical Areas. EGU General Assembly 2022, Vienna, 23-27 May 2022, EGU22-4412. https://doi.org/10.5194/egusphere-egu22-4412
Tardy, Y. (1997) Petrology of Laterites and Tropical Soils. A.A. Balkema.
Fenske, C., Braun, J., Guillocheau, F. and Robin, C. (2023) Comparing Models for Duricrust Formation in Tropical and Subtropical Areas. HAL Open Archive. https://hal.science/hal-04082134
Nahon, D. (1991) Introduction to the Petrology of Soils and Chemical Weathering. John Wiley & Sons, 313 p.
Nguetnkam, J., Villiéras, F., Ekodeck, G.E. and Yvon, J. (2008) Clay Minerals and Geochemistry of Two Lateritic Profiles Developed on Gneiss and Granite in the Humid Tropical Climate of CAMEROON (Central Africa). Geoderma , 145, 351-361.
Babechuk, M.G. and Fedo, C.M. (2023) Analysis of Chemical Weathering Trends across Three Compositional Dimensions: Applications to Modern and Ancient Mafic-Rock Weathering Profiles. Canadian Journal of Earth Sciences , 60, 839-864. https://doi.org/10.1139/cjes-2022-0053
Maslov, A.V. and Podkovyrov, V.N. (2023) Chemical Weathering Indexes: Implication for Paleoclimatic Reconstructions, with the Vendian-Lower Cambrian Section of Podolian Transnistria as Example. Lithology and Mineral Resources , 58, 213-234. https://doi.org/10.1134/s0024490222700043
Beauvais, A. (1991) Formation and Transformation Processes of Iron Duricrust System under Tropical Humid Environment. EUROLAT ’91— Supergene Ore Deposits and Mineral Formation , 5 th International Meeting , Berlin, 23-24 August 1991, 34-39.
Nguetnkam, J.P., Yongue-Fouateu, R., Bitom, D., Bilong, P. and Volkoff, B. (2005) Étude pétrologique d’une formation latéritique sur granite en milieu tropical foresti-er sud-camerounais (Afrique centrale): Mise en évidence de son caractère polyphasé. Étude et Gestion des Sols , 13, 111-126.
Mebouinz, A. and Onana, V.L., (2021) Évolution des cuirasses latéritiques sur substrat granitique dans la région de Mandjou (Est-Cameroun). Journal Camerounais de Géosciences , 15, 45-60.
Bhat, N.A., Ghosh, P., Ahmed, W., Naaz, F. and Darshinee, A.P. (2022) Comparative Evaluation of Weathering Indices of Rock-Soil Sequences in Parts of Peninsular Gneissic Complex, Western Dharwar Craton, Karnataka, India. Arabian Journal of Geosciences , 15, Article No. 1087. https://doi.org/10.1007/s12517-022-09459-8
Boeva, N.M., Makarova, M.A., Shipilova, E.S., Slukin, A.D., Soboleva, S.V., Zhegallo, E.A., et al. (2022) Gibbsite and Boehmite in Weathering Crusts of Different Ages Affected by Lateritization: Location and Formation. Doklady Earth Sciences , 504, 353-361. https://doi.org/10.1134/s1028334x22060046
Regmi, A.D., Yoshida, K., Dhital, M.R. and Pradhan, B. (2013) The Relationship be-tween Geology and Rock Weathering on the Rock Instability along Mugling-Narayanghat Road Corridor, Central Nepal Himalaya. Environmental Earth Sciences , 70, 3069-3081.
Souaibou, F., Nguetnkam, J.P., Bitom, D. and Bilong, P. (2015) Caractéristiques géochimiques des manteaux d’altération sur granitoïdes dans l’Adamaoua (Came-roun). European Scientific Journal , 11, 1857-7881.
Fenske, C., Braun, J., Guillocheau, F. and Robin, C. (2025) A Numerical Model for Duricrust Formation by Water Table Fluctuations. Earth Surface Dynamics , 13, 119-146. https://doi.org/10.5194/esurf-13-119-2025
Steinmann, M. and Stille, P. (2008) Controls on Transport and Fractionation of the Rare Earth Elements in Stream Water of a Mixed Basaltic-Granitic Catchment Basin (Massif Central, France). Chemical Geology , 254, 1-18. https://doi.org/10.1016/j.chemgeo.2008.04.004
Sababa, E., Essomba Owona, L.G., Temga, J.P. and Ndjigui, P. (2021) Petrology of Weathering Materials Developed on Granites in Biou Area, North-Cameroon: Implication for Rare-Earth Elements (REE) Exploration in Semi-Arid Regions. Heliyon , 7, e08581. https://doi.org/10.1016/j.heliyon.2021.e08581
Liu, H., Guo, H., Pourret, O., Wang, Z., Sun, Z., Zhang, W., et al. (2021) Distribution of Rare Earth Elements in Sediments of the North China Plain: A Probe of Sedimentation Process. Applied Geochemistry , 134, Article ID: 105089. https://doi.org/10.1016/j.apgeochem.2021.105089
Guo, H., Tuduri, J., Nabyl, Z., Erdmann, S., Li, X. and Gaillard, F. (2024) Rare Earth Elements in Apatite: A Proxy for Unravelling Carbonatite Melt Compositions. Earth and Planetary Science Letters , 642, Article ID: 118863. https://doi.org/10.1016/j.epsl.2024.118863
Akitsu, T. (2013) Ytterbium. In: Kretsinger, R.H., Uversky, V.N. and Permyakov, E.A., Eds., Encyclopedia of Metalloproteins , Springer, 2337-2337. https://doi.org/10.1007/978-1-4614-1533-6_200038