Abstract
The Complexe Terminal (CT) aquifer system is the main water supply for remote areas of southern Tunisia. Its exploitation has resulted in significant draw-down of the water table. The CT aquifer is a multilayered aquifer lodged in Miocene sand deposits, Senonian limestones and Turonian carbonates. Little is known about the relationships and exchanges between the different layers. Here, uranium isotopic measurements carried out in groundwater samples from the CT aquifer are presented in order to constrain models for mixing of water masses, water-rock interaction and groundwater flow. Analyses were performed using a VG54 (TIMS) at the CEREGE. Results indicate a range in {sup 238}U concentration and {sup 234}U/{sup 238}U activity ratios of 1.5 to 8 ppb and 1.1 to 3.2 respectively. Together with major and trace analyses, uranium isotopic compositions provide important insights into the factors controlling the chemical evolution of groundwater and shows very distinct patterns between carbonate and sandstone layers. (author)
Hadj Ammar, F.;
[1]
Centre Europeen de Recherche et d'Enseignement de Geosciences de l'Environnement, Aix en Provence (France)];
Deschamps, P.;
Hamelin, B.;
[2]
Chkir, N.;
Zouari, K.
[1]
- Laboratory of Radio-Analysis and Environment, National School of Engineering of Sfax, Sfax (Tunisia)
- Centre Europeen de Recherche et d'Enseignement de Geosciences de l'Environnement, Aix en Provence (France)
Citation Formats
Hadj Ammar, F., Centre Europeen de Recherche et d'Enseignement de Geosciences de l'Environnement, Aix en Provence (France)], Deschamps, P., Hamelin, B., Chkir, N., and Zouari, K.
Uranium Isotopes as a Tracer of Groundwater Evolution in the Complexe Terminal Aquifer of Southern Tunisia.
IAEA: N. p.,
2013.
Web.
Hadj Ammar, F., Centre Europeen de Recherche et d'Enseignement de Geosciences de l'Environnement, Aix en Provence (France)], Deschamps, P., Hamelin, B., Chkir, N., & Zouari, K.
Uranium Isotopes as a Tracer of Groundwater Evolution in the Complexe Terminal Aquifer of Southern Tunisia.
IAEA.
Hadj Ammar, F., Centre Europeen de Recherche et d'Enseignement de Geosciences de l'Environnement, Aix en Provence (France)], Deschamps, P., Hamelin, B., Chkir, N., and Zouari, K.
2013.
"Uranium Isotopes as a Tracer of Groundwater Evolution in the Complexe Terminal Aquifer of Southern Tunisia."
IAEA.
@misc{etde_22123094,
title = {Uranium Isotopes as a Tracer of Groundwater Evolution in the Complexe Terminal Aquifer of Southern Tunisia}
author = {Hadj Ammar, F., Centre Europeen de Recherche et d'Enseignement de Geosciences de l'Environnement, Aix en Provence (France)], Deschamps, P., Hamelin, B., Chkir, N., and Zouari, K.}
abstractNote = {The Complexe Terminal (CT) aquifer system is the main water supply for remote areas of southern Tunisia. Its exploitation has resulted in significant draw-down of the water table. The CT aquifer is a multilayered aquifer lodged in Miocene sand deposits, Senonian limestones and Turonian carbonates. Little is known about the relationships and exchanges between the different layers. Here, uranium isotopic measurements carried out in groundwater samples from the CT aquifer are presented in order to constrain models for mixing of water masses, water-rock interaction and groundwater flow. Analyses were performed using a VG54 (TIMS) at the CEREGE. Results indicate a range in {sup 238}U concentration and {sup 234}U/{sup 238}U activity ratios of 1.5 to 8 ppb and 1.1 to 3.2 respectively. Together with major and trace analyses, uranium isotopic compositions provide important insights into the factors controlling the chemical evolution of groundwater and shows very distinct patterns between carbonate and sandstone layers. (author)}
place = {IAEA}
year = {2013}
month = {Jul}
}
title = {Uranium Isotopes as a Tracer of Groundwater Evolution in the Complexe Terminal Aquifer of Southern Tunisia}
author = {Hadj Ammar, F., Centre Europeen de Recherche et d'Enseignement de Geosciences de l'Environnement, Aix en Provence (France)], Deschamps, P., Hamelin, B., Chkir, N., and Zouari, K.}
abstractNote = {The Complexe Terminal (CT) aquifer system is the main water supply for remote areas of southern Tunisia. Its exploitation has resulted in significant draw-down of the water table. The CT aquifer is a multilayered aquifer lodged in Miocene sand deposits, Senonian limestones and Turonian carbonates. Little is known about the relationships and exchanges between the different layers. Here, uranium isotopic measurements carried out in groundwater samples from the CT aquifer are presented in order to constrain models for mixing of water masses, water-rock interaction and groundwater flow. Analyses were performed using a VG54 (TIMS) at the CEREGE. Results indicate a range in {sup 238}U concentration and {sup 234}U/{sup 238}U activity ratios of 1.5 to 8 ppb and 1.1 to 3.2 respectively. Together with major and trace analyses, uranium isotopic compositions provide important insights into the factors controlling the chemical evolution of groundwater and shows very distinct patterns between carbonate and sandstone layers. (author)}
place = {IAEA}
year = {2013}
month = {Jul}
}