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Existence de karsts en roches cristallines silicatées non carbonatées en Afrique sahélienne et équatoriale, implications hydrogéologiques.

Luc Willems 1 André Pouclet 2 Jean-Paul Vicat 2
1 Laboratoire de sédimentologie, Dpt Géologie-Pétrologie-Géochimie
2 ISTO - Institut des Sciences de la Terre d'Orléans
Abstract : Various cavities studied in western Niger and South Cameroon show the existence of important karstic phenomena into metagabbros and gneisses. These large-sized caves resulted from generalized dissolution of silicate formations in spite of their low solubility. Karstification is produced by deep hydrous transfer along lithological discontinuities and fracture net works. The existence of such caves has major implications in geomorphology, under either Sahelian and Equatorial climate, and in hydrogeology and water supply, particularly in the Sahel area
keyword : Silico-aluminous karst Sahelian Africa Equatorial Africa Hydrogeology
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https://hal-insu.archives-ouvertes.fr/hal-00076860
Contributor : Nathalie Pothier <>
Submitted on : Monday, May 29, 2006 - 9:43:54 AM
Last modification on : Wednesday, October 14, 2020 - 5:22:09 PM

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Luc Willems, André Pouclet, Jean-Paul Vicat. Existence de karsts en roches cristallines silicatées non carbonatées en Afrique sahélienne et équatoriale, implications hydrogéologiques.. Bulletin de la Société Géologique de France, Société géologique de France, 2002, 173, pp.337-345. ⟨10.2113/173.4.337⟩. ⟨hal-00076860⟩

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