Cartographie de corps stériles sous couverture quaternaire par méthode de résistivités électriques dans le gisement phosphaté de Sidi Chennane (Maroc)Sterile bodies mapping under Quaternary cover using resistivity-sounding method in the phosphatic bearing of Sidi Chennane (Morocco) |
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Authors: | Azzouz Kchikach Mohammed Jaffal Tahar A??fa Lahcen Bahi |
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Institution: | 1. Faculté des sciences et techniques, université Cadi-Ayyad, BP 618, Marrakech, Maroc;2. Géosciences Rennes, CNRS–UMR 6118, université Rennes-1, campus de Beaulieu, bât. 15, 35042 Rennes cedex, France;3. École Mohammadia des ingénieurs, université Mohamed-V, Rabat Agdal, Maroc |
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Abstract: | In the Ouled Abdoun sedimentary basin (Morocco), the phosphatic series is composed of regular interbedded phosphatic and marly limestone layers. Some phosphatic deposits in this basin show sterile bodies causing two kinds of problems: (1) as they are hard, compact and masked by a Quaternary cover, they disturb the exploitation in some yards and give bad reserve calculations; (2) even the use of wells and mechanical boreholes did not evidence their delimitation. Therefore, electric prospecting method has been used to evidence their geometrical shape. Petrographical and geometrical studies on these sterile bodies allowed us to choose the appropriate geophysical method to map them. The electrical resistivity survey that we used in the Sidi Chennane area shows that this technique is a good tool to contour these sterile bodies. This method is now considered as useful to the mining engineers to get round them during the exploitation. To cite this article: A. Kchikach et al., C. R. Geoscience 334 (2002) 379–386. |
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Keywords: | Morocco Sidi Chennane sterile bodies phosphatic series electrical prospecting resistivity Maroc Sidi Chennane corps stériles série phosphatée prospection électrique résistivité Géophysique interne Géophysique appliquée Internal Geophysics Applied Geophysics |
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