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Article

Geochemical and Isotope Characterisation of Thermo-Mineral Springs of Corsica Island: From Geological Complexity to Groundwater Singularity

1
Département d’Hydrogéologie, Université de Corse Pascal Paoli, Campus Grimaldi, BP 52, 20250 Corte, France
2
Centre National de la Recherche Scientifique, UMR 6134, SPE, BP 52, 20250 Corte, France
3
Dipartimento di Scienze della Terra, Università di Pisa, Via Santa Maria, 53, 56126 Pisa, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Elias Dimitriou
Water 2021, 13(17), 2413; https://doi.org/10.3390/w13172413
Received: 28 June 2021 / Revised: 27 August 2021 / Accepted: 30 August 2021 / Published: 2 September 2021
(This article belongs to the Section Hydrology)
Understanding hydrogeological processes at the origin of thermal and mineral groundwater are necessary to ensure their sustainable management. However, many processes are involved in their genesis and often only one or two processes are investigated at the same time. Here, we propose to use an innovative combination of geochemical, isotopic (34S, 14C, 18O, 2H) and geothermometry tools to identify, for the first time in a multi-composite geological context, all processes at the origin of diversified thermo-mineral waters. 19 springs covering a wide range of temperature and chemical composition emerging on a restricted area of Corsica Island (France) were selected. Geochemical results highlight five geochemical provinces, suggesting a common origin for some of them. Geothermometry tools show the unexpected involvement of a common deep groundwater reservoir within this non-active zone. Water stable isotopes highlight a contrasted altitude in recharge areas supplying lowland springs. This suggests that different flow patterns have to be involved to explain the wide geochemical diversity observed and to allow the design of a very first conceptual groundwater-flow model. This paper demonstrates the efficiency of the combination of the selected tools as tracers of water–rock interaction, independently of flow depth, intrinsic water properties, geological conditions and interaction time disparities. View Full-Text
Keywords: hydrochemistry; isotope hydrology; geothermometry; mineral water; thermal water; gaseous springs; CO2; brines; Corsica hydrochemistry; isotope hydrology; geothermometry; mineral water; thermal water; gaseous springs; CO2; brines; Corsica
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MDPI and ACS Style

Dupuy, M.; Garel, E.; Huneau, F.; Santoni, S.; Di Rosa, M.; Mattei, A. Geochemical and Isotope Characterisation of Thermo-Mineral Springs of Corsica Island: From Geological Complexity to Groundwater Singularity. Water 2021, 13, 2413. https://doi.org/10.3390/w13172413

AMA Style

Dupuy M, Garel E, Huneau F, Santoni S, Di Rosa M, Mattei A. Geochemical and Isotope Characterisation of Thermo-Mineral Springs of Corsica Island: From Geological Complexity to Groundwater Singularity. Water. 2021; 13(17):2413. https://doi.org/10.3390/w13172413

Chicago/Turabian Style

Dupuy, Margaux, Emilie Garel, Frederic Huneau, Sebastien Santoni, Maria Di Rosa, and Alexandra Mattei. 2021. "Geochemical and Isotope Characterisation of Thermo-Mineral Springs of Corsica Island: From Geological Complexity to Groundwater Singularity" Water 13, no. 17: 2413. https://doi.org/10.3390/w13172413

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