Evidence for a Saline Component at Shallow Depth in the Crystalline Armorican Basement (W France) - Archive ouverte HAL Access content directly
Conference Papers Procedia Earth and Planetary Science Year : 2013

Evidence for a Saline Component at Shallow Depth in the Crystalline Armorican Basement (W France)

Luc Aquilina
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Antoine Armandine Les Landes
Thierry Labasque
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Clément Roques
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  • IdRef : 177798041
Philippe Davy

Abstract

Saline fluids at shallow depth (50 - 450 m) in the Armorican basement were investigated. Fluids with salinities ranging from 80 to 900 mg/L mix with modern shallow groundwaters containing anthropogenic solutes. The most saline fluids are deeper or more isolated from mixing. These fluids reveal Br/Cl and SO4/Cl ratios that are typically marine. This work establishes the migration and the preservation of a marine end-member in a basement aquifer, and may provide keys for the understanding of such fluid circulation.

Dates and versions

insu-00853165 , version 1 (22-08-2013)

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Luc Aquilina, Antoine Armandine Les Landes, Virginie Ayraud-Vergnaud, Thierry Labasque, Clément Roques, et al.. Evidence for a Saline Component at Shallow Depth in the Crystalline Armorican Basement (W France). Fourteenth International Symposium on Water-Rock Interaction, WRI 14, Jun 2013, Avignon, France. pp.19-22, ⟨10.1016/j.proeps.2013.03.157⟩. ⟨insu-00853165⟩
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