Geochemical tracing and modeling of surface and deep water–rock interactions in elementary granitic watersheds (Strengbach and Ringelbach CZOs, France)

Francois Chabaux (1) , Daniel Viville (1) , Yann Lucas (1) , Joseph Schacherer (1) , C. Ranchoux (1) , Marie-Claire Pierret (1) , Thierry Labasque (2) , Luc Aquilina (2) , Robert Wyns (3) , Catherine Lerouge (3) , Chrystel Dezayes (3) , Philippe Négrel (3)

1 LHyGeS - Laboratoire d'Hydrologie et de Géochimie de Strasbourg
2 GR - Géosciences Rennes
3 BRGM - Bureau de Recherches Géologiques et Minières

From the study of the Strengbach and Ringelbach watersheds we propose to illustrate the interest of combining the geochemical tracing and geochemical modeling approaches on surface and deep borehole waters, to decipher the diversity of the water flow and the associated water–rock interactions in such elementary mountainous catchments. The results point to a clear geochemical typology of waters depending on the water circulations (deep vs. hypodermic) within the substratum.

Mots clés: Anthropogenic gases (CFC; Sr isotope ratios; SF6); U activity ratios; Water pathway; Weathering

Domaines: Géochimie; Hydrologie

Francois Chabaux, Daniel Viville, Yann Lucas, Joseph Schacherer, C. Ranchoux, et al.. Geochemical tracing and modeling of surface and deep water–rock interactions in elementary granitic watersheds (Strengbach and Ringelbach CZOs, France). Acta Geochimica, 2017, 36 (3), pp.363-366. ⟨10.1007/s11631-017-0163-5⟩. ⟨insu-01524691⟩