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• W2012806972 abstract "In Douala (Littoral Cameroon), the Cretaceous to Quaternary formation composed of marine to continental sediments are covered by ferrallitic soils. These sediments and soils have high contents of SiO2 (≥70.0 wt%), intermediate contents of Al2O3 (11.6–28.4 wt%), Fe2O3 (0.00–20.5 wt%) and TiO2 (0.04–4.08 wt%), while K2O (≤0.18 wt%), Na2O (≤0.04 wt%), MgO (≤0.14 wt%) and CaO (≤0.02 wt%) are very low to extremely low. Apart from silica, major oxides and trace elements (REE included) are more concentrated in the fine fraction (<62.5 μm) whose proportions of phyllosilicates and heavy minerals are significant. The close co-associations between Zr, Hf, Th and ∑REE in this fraction suggest that REE distribution is controlled by monazite and zircon. CIA values indicate intense weathering. Weathering products are characterized by the association Al2O3 and Ga in kaolinite; the strong correlation between Fe2O3 and V in hematite and goethite; the affinity of TiO2 with HFSE (Hf, Nb, Th, Y and Zr) in heavy minerals. The ICV values suggest mature sediments. The PCI indicates a well-drained environment whereas U/Th and V/Cr ratios imply oxic conditions. La/Sc, La/Co, Th/Cr, Th/Sc and Eu/Eu* elemental ratios suggest a source with felsic components. Discrimination diagrams are consistent with the felsic source. The REE patterns of some High-K granite and granodiorite of the Congo Craton resemble those of the samples, indicating that they derive from similar source rocks." @default.
• W2012806972 created "2016-06-24" @default.
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• W2012806972 date "2014-12-01" @default.
• W2012806972 modified "2023-10-05" @default.
• W2012806972 title "Relationships between major and trace elements during weathering processes in a sedimentary context: Implications for the nature of source rocks in Douala, Littoral Cameroon" @default.
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• W2012806972 doi "https://doi.org/10.1016/j.chemer.2014.05.003" @default.
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