Sur l'origine par altération du substratum schisteux de la minéralisation chlorurée des eaux d'une nappe côtière sous climat semi-aride (Chtouka-Massa,Maroc) |
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| Authors: | Samira Krimissa Jean-Luc Michelot Lhoussaine Bouchaou Jacques Mudry Youssef Hsissou |
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| Institution: | 1. Équipe d''accueil n° 2642, « Déformation – Écoulement – Transfert », faculté des sciences, université de Franche-Comté, 16, route de Gray, 25030 Besançon cedex, France;2. FRE CNRS–UPS « OrsayTerre », université Paris-Sud, bât. 504, 91405 Orsay cedex, France;3. Laboratoire de géologie appliquée et de géo-environnement, faculté des sciences d''Agadir, BP 28/S, 80000 Agadir, Maroc |
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| Abstract: | The origin of chloride ions in groundwater from the Chtouka-Massa plain (Morocco) was studied by using chemical and isotopic analyses of water, and petrographic and chemical analyses of rocks. It appears that the schist formation, which forms the basement of the studied aquifer, is the main source of the high Cl? concentrations in groundwater. In these schists, chloride is, for a part, probably contained in biotites, and is released into groundwater through the weathering of these minerals. However, the exceptionally high chloride contents of these schists are difficult to explain if one does not assume that they also contain evaporitic-type minerals. To cite this article: S. Krimissa et al., C. R. Geoscience 336 (2004). |
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| Keywords: | eau souterraine chlorure aquifère côtier schistes altération composition chimique isotopes stables Maroc chloride groundwater coastal aquifer schists weathering chemical composition stable isotopes Morocco |
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