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Ngon G. F. N., Etame J., Ntamak-Nida M. J., Mbesse C. O., Mbai J. S., Bayiga E. C., Gérard Martine. (2016). Geochemical and palaeoenvironmental characteristics of Missole I iron duricrusts of the Douala sub-basin (Western Cameroon). Comptes Rendus Geoscience, 348 (2), p. 127-137. ISSN 1631-0713.

Titre du document
Geochemical and palaeoenvironmental characteristics of Missole I iron duricrusts of the Douala sub-basin (Western Cameroon)
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000373518700005
Auteurs
Ngon G. F. N., Etame J., Ntamak-Nida M. J., Mbesse C. O., Mbai J. S., Bayiga E. C., Gérard Martine
Source
Comptes Rendus Geoscience, 2016, 348 (2), p. 127-137 ISSN 1631-0713
Major and trace element composition of iron duricrusts including clayey material samples and biostratigraphy of the Missole I outcrop from the Paleocene-Eocene N'Kapa Formation in the Douala sub-basin of Cameroon were used to infer the palaeoenvironment and relative age of the iron duricrusts. Iron duricrusts and clayey materials are essentially kaolinitic and smectitic and are generally siliceous and ferruginous (iron duricrusts) or siliceous and aluminous (clayey materials). These materials have high Chemical Indices of Alteration (CIA=86.6-99.33%). The negative Eu anomalies with high (La/Yb)(N) shown by iron duricrusts and clayey sediments are essentially derived from silicic or felsic parent rocks when fractionated chondrite-normalized REE patterns also indicate felsic or silicic parent rocks. The Missole I iron duricrusts have a post-Thanetian age according to the relative age of claystones (Thanetian) and were formed after the deposition of sedimentary materials in an anoxic low-depth marine environment with eutrophication of surface water, and may have been exhumed and oxidized under arid climate.
Plan de classement
Géologie et formations superficielles [064]
Description Géographique
CAMEROUN
Localisation
Fonds IRD [F B010066760]
Identifiant IRD
fdi:010066760
Contact