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Existence of karst in silicified non-carbonate crystalline rocks in Sahelian and Equatorial Africa; hydrogeological implications

Luc Willems, Andre Pouclet and Jean-Paul Vicat
Existence de karsts en roches cristallines silicatees non carbonatees en Afrique sahelienne et equatoriale; implications hydrogeologiques
Bulletin de la Societe Geologique de France (2002) 173 (4): 337-345

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.


ISSN: 0037-9409
EISSN: 1777-5817
Coden: #02538
Serial Title: Bulletin de la Societe Geologique de France
Serial Volume: 173
Serial Issue: 4
Title: Existence de karsts en roches cristallines silicatees non carbonatees en Afrique sahelienne et equatoriale; implications hydrogeologiques
Translated Title: Existence of karst in silicified non-carbonate crystalline rocks in Sahelian and Equatorial Africa; hydrogeological implications
Affiliation: Universite de Liege, Departement de Geologie-Petrologie-Geochimie, Liege, Belgium
Pages: 337-345
Published: 2002
Text Language: French
Summary Language: English
Publisher: Societe Geologique de France, Paris, France
References: 30
Accession Number: 2003-037343
Categories: GeomorphologyHydrogeology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. block diag., 1 table, geol. sketch maps
N12°30'00" - N13°30'00", E01°00'00" - E02°00'00"
N04°00'00" - N04°00'00", E12°00'00" - E12°30'00"
Secondary Affiliation: Universite d'Orleans, FRA, France
Country of Publication: France
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200312
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