Using isotope data to characterize and date groundwater in the southern sector of the Guaraní Aquifer System
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Vives, Luis; Rodríguez, Leticia; Manzano Arellano, María del Sol; Mira, Andrés; Araguás Araguás, Luis; [et al.]Área de conocimiento
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The different works were founded by the International Atomic Energy Agency, the Argentina National Agency for Scientific and Technological Promotion (Project PICT2008-2071), the Spanish Ministry for Economy and Competitivity (Project CGL2009- 12910-C03-03, REDESAC), and the Instituto de Hidrología de Llanuras (CONICET, Azul). The authors are indebted with Dr. Pradeep Aggarwal (formerly at the IAEA) for facilitating the research, with Drs Roberto Kirchheim and Didier Gastmans (Rio Claro University, Brazil) for performing the noble gases sampling, and with the Provincial Directorate of Parks of the Corrientes Province for their strong support with personnel, vehicles, and boats, making possible most of fieldwork. The authors would like to thank the anonymous reviewers for their useful comments and suggestions.Realizado en/con
Instituto de Hidrología de Llanuras, Argentina; Universidad Nacional del Litoral, Argentina; Agencia Internacional de Energía Atómica; Instituto Geológico y Minero de España, MadridFecha de publicación
2020-09-07Editorial
Taylor & Francis GroupCita bibliográfica
Vives, L.; Rodríguez, L.; Manzano, M.; Mira, A.; Araguás-Araguás, L.; Ortega, L.; Heredia, J. and Matsumoto, T. 2020. Using isotope data to characterize and date groundwater in the southern sector of the Guaraní Aquifer System. Isotopes in Environmental and Health Studies, 56:5-6, 533-550. https://doi.org/10.1080/10256016.2020.1810684Revisión por pares
siPalabras clave
ArgentinaCorrientes and Misiones provinces
carbon-14
groundwater age
Guaraní Aquifer System
helium-4
isotope hydrology
hydrogen-2
oxigen-18
krypton-81
hydrogeochemistry
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Resumen
The Guaraní Aquifer System (SAG) is the largest transboundary aquifer in Latin America, extending beneath parts of Brazil, Paraguay, Argentina, and Uruguay. This paper presents the results of recent hydrogeological studies in the southern portion of the SAG. Locally, the abundance of surface water bodies precluded the use of conventional hydrological tools to characterize groundwater flows. Geological, hydrochemical and environmental isotope investigations were integrated to postulate a revised hydrogeological conceptual model. The revised geological model has provided a better definition of the geometry of the aquifer units and outlined the relevance of regional faults in controlling flow patterns. The new potentiometric map is consistent with groundwater flow from the SAG outcrops to the centre of the Corrientes Province, where upwards flows were identified. Hydrochemical and isotope data confirmed the widespread occurrence of mixing. Noble gas isotopes dissolved in groundwater (4He ...
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