RT Journal Article
T1 Multi-isotope (δ2H, δ18O, δ13C-TDIC, δ18O-TDIC, 87Sr/86Sr) and hydrochemical study on fractured-karstic and detritic shallow aquifers in the Pampean region, Argentina
A1 Glok-Galli, Melisa
A1 Martínez, Daniel E.
A1 Vadillo-Pérez, Iñaki
A1 Silva-Busso, Adrian
A1 Barredo, Silvia P.
A1 Quiroz Londoño, Orlando M.
A1 Trezza, Mónica A.
K1 Acuíferos
K1 Hidrogeología
K1 Hidrología kárstica
K1 Agua - Química
K1 Isótopos - La Pampa (Argentina, Provincia)
AB Fluxes between fractured-karstified and detritic aquifers are commonly poorly understood in many environments. These two types of aquifers are in contact in the southeastern Pampean region in the Argentine Buenos Aires province, and the aim of this work is to analyze their relationship contributing to improve the hydrological model. A joint application of hydrochemical and multi-isotope (δ2H, δ18O, δ13C-TDIC, δ18O-TDIC, 87Sr/86Sr) tools was used. TDIC, δ2H, δ18O and δ13C-TDIC allowed differentiating two main end members. Water in the Pampeano aquifer (PA) which is transferred from the fractured-karstic aquifer (F-KA) is characterised by high TDIC around 500–700 mg/L, isotopically depleted in 18O (about −5.5 ‰) and high δ13C-TDIC (around −10.0 ‰). The other end member is direct recharge water infiltrated into the PA with TDIC ranging from 400 to 500 mg/L, slightly enriched in 18O (δ18O = −4.8 ‰), and δ13C-TDIC in the range of soil CO2 as a result of reactions with calcrete concretions (from −20.0 to −9.0 ‰). Dolomite dissolution is the main process controlling the chemistry of the low-mineralized (Mg–Ca-HCO3) waters, whereas high-mineralized (Na-HCO3) waters are strongly influenced by ion-exchange reactions with adsorbed Ca2+ and Mg2+ and by evaporation.
PB Taylor & Francis
SN 1025-6016
YR 2020
FD 2020
LK https://hdl.handle.net/10630/35776
UL https://hdl.handle.net/10630/35776
LA eng
NO Glok-Galli, M., Martínez, D. E., Vadillo-Pérez, I., Silva Busso, A. A., Barredo, S. P., Quiroz Londoño, O. M., & Trezza, M. A. (2020). Multi-isotope (δ2H, δ18O, δ13C-TDIC, δ18O-TDIC, 87Sr/86Sr) and hydrochemical study on fractured-karstic and detritic shallow aquifers in the Pampean region, Argentina. Isotopes in Environmental and Health Studies, 56(5–6), 513–532. https://doi.org/10.1080/10256016.2020.1825412
NO https://openpolicyfinder.jisc.ac.uk/id/publication/5477
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 28 ene 2026