Article Dans Une Revue Current Journal of Applied Science and Technology Année : 2021

Genesis of Meka’a Geophagic Kaolin Deposit (In Foreke-Dschang West Cameroon)

Résumé

Geological, mineralogical and geochemical studies where carried out on Meka’a kaolin deposit located in Foréké-Dschang in order to define the ore genesis. Three kaolin facies (yellow, red and white) and isalteritic components were characterized by different methods including morphostructural description, XRD, XRF, ICP-MS, SEM-EDS, heavy mineral research and organic matter contents. The results show that all these kaolins are based on kaolinite (87–90%) associated with more or less significant phases of orthoclase (1-2%), goethite (0.5-3.5%), quartz (1-1.5%), anatase (1.2-2%) and hematite (1-2%). Small amounts of illite (3.5%) was found only in white facies. The scanning electron microscope (SEM) pattern shows that kaolinite particles contained in these kaolins are very small (<2 µm) and are poorly crystallized due to the impurities they contain. Meka’a kaolin’s are extremely weathered (CIA and CIW ≈ 100) and their organic matter content is considerable (1.82-2.54%) and is explained by the presence of carbonized wood in the ignimbrites. The combination of different analytical techniques points out a meteoric weathering of ignimbrite under oxidizing conditions as being of petrogenetic origin of this kaolin deposit.

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hal-05244097 , version 1 (08-09-2025)

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  • HAL Id : hal-05244097 , version 1

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S. A. Douola Ninla, G Kieufack, I. Y Bomeni, M. Gountié Dedzo, A. S. L Wouatong. Genesis of Meka’a Geophagic Kaolin Deposit (In Foreke-Dschang West Cameroon). Current Journal of Applied Science and Technology, 2021, 40 (2), pp.1-17. ⟨hal-05244097⟩

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