%0 Conference Proceedings %T A glimpse of the Anthropocene captured by environmental tracers in the groundwater of a fractured aquifer %+ Géosciences Rennes (GR) %+ Institute of Environmental Physics [Heidelberg] (IUP) %+ Observatoire des Sciences de l'Univers de Rennes (OSUR) %A Chatton, Eliot %A Labasque, Thierry %A Aeschbach, Werner %A Vergnaud, Virginie %A Aquilina, Luc %< avec comité de lecture %B Goldschmidt 2021 %C Virtual, France %I European Association of Geochemistry %8 2021-07-04 %D 2021 %R 10.7185/gold2021.6897 %Z Sciences of the Universe [physics]/Earth Sciences/HydrologyConference papers %X Goldschmidt 2021 Abstracthttps://doi.org/10.7185/gold2021.6897A glimpse of the Anthropocenecaptured by environmental tracers inthe groundwater of a fracturedaquiferDR. ELIOT CHATTON1, THIERRY LABASQUE2,WERNER AESCHBACH3, VIRGINIE VERGNAUD2 ANDLUC AQUILINA41CNRS UMR61182Univ. Rennes, CNRS, UMS 33433Institute of Environmental Physics4Université de Rennes 1 Géosciences Rennes UMR 6118Presenting Author: eliot.chatton@univ-rennes1.frThe Anthropocene is an epoch in Earth’s history that has beenproposed to characterise the global impact of human activities onthe Earth's atmosphere, biosphere, hydrosphere, geosphere, i.e.the Critical Zone.Just as for past climates, the signature of these anthropogenicimpacts are recorded by environmental tracers dissolved ingroundwater that could provide a better understanding ofgroundwater flows, residence time and mixing thus providinginformation on this major water resource both in terms ofquantity and quality.In this study, we use dissolved gases (CFCs, SF6, 4He, 14C,noble gases, VOCs, stable isotopes) and groundwater chemicalcomposition as environmental tracers to unveil insights of theAnthropocene in a fractured aquifer in the northwest of France.We analyse the impact of groundwater abstraction on residencetime and excess air composition. We evidence the influence ofclimate change on groundwater recharge temperature (noble gastemperatures, NGT). We also quantify the appearance ofanthropogenic compounds over the last decades.These observations enable us to define the Anthropocenesignature in groundwater and the distribution of its impacts onthe groundwater resource in order to gain a better picture of itsresilience in the future. %G English %L insu-03438986 %U https://insu.hal.science/insu-03438986 %~ INSU %~ UNIV-RENNES1 %~ UR2-HB %~ CNRS %~ GR %~ OSUR %~ GIP-BE %~ UR1-HAL %~ UR1-SDLM %~ GR-DIMENV %~ UNIV-RENNES2 %~ TEST-UR-CSS %~ UNIV-RENNES %~ INRAE %~ UR1-ENV %~ GR-ET %~ TEST3-HALCNRS %~ TEST4-HALCNRS %~ RESEAU-EAU %~ TEST5-HALCNRS