Articles | Volume 19, issue 3
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, L. Aquilina, P. Davy, V. Vergnaud-Ayraud, and C. Le Carlier


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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.