Articles | Volume 19, issue 3
Hydrol. Earth Syst. Sci., 19, 1413–1426, 2015
https://doi.org/10.5194/hess-19-1413-2015
Hydrol. Earth Syst. Sci., 19, 1413–1426, 2015
https://doi.org/10.5194/hess-19-1413-2015

Research article 16 Mar 2015

Research article | 16 Mar 2015

Timescales of regional circulation of saline fluids in continental crystalline rock aquifers (Armorican Massif, western France)

A. Armandine Les Landes et al.

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Revised manuscript not accepted

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Cited articles

Aquilina, L. and Dreuzy, J.-R. De: Relationship of present saline fluid with paleomigration of basinal brines at the basement/sediment interface (Southeast basin – France), Appl. Geochem., 26, 1933–1945, https://doi.org/10.1016/j.apgeochem.2011.06.022, 2011.
Aquilina, L., Pauwels, H., Genter, A., and Fouillac, C.: Water-rock interaction processes in the Triassic sandstone and the granitic basement of the Rhine Graben: Geochemical investigation of a geothermal reservoir, Geochim. Cosmochim. Acta, 61, 4281–4295, https://doi.org/10.1016/S0016-7037(97)00243-3, 1997.
Aquilina, L., Armandine Les Landes, A., Ayraud-Vergnaud, V., Labasque, T., Roques, C., Davy, P., Pauwels, H. and Petelet-Giraud, E.: Evidence for a Saline Component at Shallow Depth in the Crystalline Armorican Basement (W France), Proced. Earth Planet. Sci., 7, 19–22, https://doi.org/10.1016/j.proeps.2013.03.157, 2013.
Ayraud, V., Aquilina, L., Labasque, T., Pauwels, H., Molenat, J., Pierson-Wickmann, A.-C., Durand, V., Bour, O., Tarits, C., Le Corre, P., Fourre, E., Merot, P., and Davy, P.: Compartmentalization of physical and chemical properties in hard-rock aquifers deduced from chemical and groundwater age analyses, Appl. Geochem., 23, 2686–2707, https://doi.org/10.1016/j.apgeochem.2008.06.001, 2008.
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Short summary
The crystalline rock aquifers of the Armorican Massif present clear evidence of a marine origin of the saline component in the fluids on the regional scale. High chloride concentrations are attributed to three past marine transgressions. The relationship between chloride concentration and transgression age provides constraints for the timescales of fluid circulation. This time frame is useful information for developing conceptual models of the paleo-functioning of Armorican aquifers.