التفاصيل البيبلوغرافية
| العنوان: |
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. |
| المؤلفون: |
Glok-Galli, Melisa, Martínez, Daniel E., Vadillo-Pérez, Iñaki, Silva Busso, Adrián A., Barredo, Silvia P., Quiroz Londoño, Orlando M., Trezza, Mónica A. |
| المصدر: |
Isotopes in Environmental & Health Studies; Oct-Dec2020, Vol. 56 Issue 5/6, p513-532, 20p |
| مصطلحات موضوعية: |
DOLOMITE, AQUIFERS, CALCRETES, HYDROLOGY, SOILS, WATER, FLUX (Energy) |
| مصطلحات جغرافية: |
ARGENTINA |
| مستخلص: |
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. [ABSTRACT FROM AUTHOR] |
|
Copyright of Isotopes in Environmental & Health Studies is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |