Eaux fortement minéralisées et circulations profondes dans le socle. Exemple des Alpes franco-italiennes |
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| Authors: | Gian-Maria Zuppi Jean-Paul Novel Martial Dray Xavier Darmendrail Serge Fudral Claude Jusserand Gérard Nicoud |
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| Institution: | 1. Dipartimento di Scienze Ambientali, Università Cá Foscari di Venezia, Calle Larga Santa Marta, Dorsoduro 2137, 30123 Venezia, Italie;2. SEA Consulting, via Cernaia 27, 10121 Torino, Italie;3. Centre de recherches géodynamiques, université Pierre-et-Marie-Curie, Paris-6, 47, av. de Corzent, 74200 Thonon-les-Bains, France;4. Lyon–Turin Ferroviaire SAS, 1091, av. de la Boisse, 73026 Chambéry, France;5. EDYTEM, université de Savoie, campus scientifique, 73376 Le-Bourget-du-Lac, France |
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| Abstract: | The presence in the French–Italian Alps of several springs characterized by a high sodium–chloride content, depleted in oxygen-18, tritium free and with low carbon-14 activity, is well known. The geological, hydrological, and geochemical studies in progress for the new high-speed railway tunnel crossing the French–Italian Alps, show, in the drilled boreholes at a mean elevation of 700 masl, the presence of brines. Brines appear to be the basis of the geological, structural, and hydrodynamic systems, and fill the largest faults and the main tectonic contacts. The brines squeezed by tectonic activity, are mobilised at depth by freshwaters from the surface. To cite this article: G.-M. Zuppi et al., C. R. Geoscience 336 (2004). |
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| Keywords: | Alpes roches cristallophylliennes circulations hydriques profondes saumures isotopes de l'environnement Alps crystalline rocks water deep circulation brines environmental isotopes |
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