Establishing constraints on groundwater ages with Cl,C, H,and noble gases: A case study in the eastern Paris basin,France |
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| Authors: | Véronique Lavastre Corinne Le Gal La Salle Jean-Luc Michelot Sophie Giannesini Lucilla Benedetti Joël Lancelot Bernard Lavielle Marc Massault Bertrand Thomas Eric Gilabert Didier Bourlès Norbert Clauer Pierre Agrinier |
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| Institution: | 1. CEREGE, CNRS – UMR 6635, Europôle Méditerranéen de l’Arbois, 13545 Aix-en-Provence, France;2. CNAB, CNRS – UMR 5084, BP120, 33175 Gradignan, France;3. GIS, Université de Nîmes, 150 Rue Georges Besse, 30035 Nîmes, France;4. IDES, UMR 8148 CNRS – Université Paris-Sud, Bât. 504, 91405 Orsay, France;5. Centre de Géochimie de la Surface (CNRS/ULP), Université Louis Pasteur, 1 rue Blessig, 67084 Strasbourg, France;6. Laboratoire de Géochimie des Isotopes Stables, Institut de Physique du Globe de Paris, Université Paris 7, UMR CNRS 7154, 2, Place Jussieu, 75251 Paris Cedex 05, France |
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| Abstract: | Groundwaters from the Tithonian/Kimmeridgian, Oxfordian and Upper Dogger aquifers, within the eastern part of the Paris basin (France), were characterised using 3H, 14C and 36Cl, and noble gases tracers, to evaluate their residence times and determine their recharge period. This information is an important prerequisite to evaluating the confinement properties of the Callovo-Oxfordian clay formation sandwiched between the Oxfordian aquifer and the Dogger aquifer, currently being investigated by the French nuclear waste management agency (Andra) for radioactive waste disposal. Data presented in this paper are used to test 4 hypotheses. |
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