Stable isotopes (H, O, S) signatures evidencing evolutionary trends of Brazilian spas groundwaters
This paper reports a stable isotope (H, O, S) study of groundwater samples (25) in 10 spas from southeast Brazil. They are cold (25°C, 36%), hypothermal (25-33°C, 60%) and mesothermal (33-36°C, 4%) waters; and are predominantly composed of bicarbonate, carbonate and sodium. Dissolved sulfate is the...
| Autores: | , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/162000 |
| Acceso en línea: | https://hdl.handle.net/2445/162000 |
| Access Level: | acceso abierto |
| Palabra clave: | Isòtops estables en ecologia Hidrologia d'aigües subterrànies Brasil Stable isotopes in ecological research Groundwater hydrology Brazil |
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Stable isotopes (H, O, S) signatures evidencing evolutionary trends of Brazilian spas groundwatersSoler i Gil, AlbertBonotto, D.M.Isòtops estables en ecologiaHidrologia d'aigües subterràniesBrasilStable isotopes in ecological researchGroundwater hydrologyBrazilThis paper reports a stable isotope (H, O, S) study of groundwater samples (25) in 10 spas from southeast Brazil. They are cold (25°C, 36%), hypothermal (25-33°C, 60%) and mesothermal (33-36°C, 4%) waters; and are predominantly composed of bicarbonate, carbonate and sodium. Dissolved sulfate is the dominant anion in one water sample and its concentration increased with increase in pH, electrical conductivity (EC) and total dissolved solids (TDS) values in the samples. 2H and 18O data reported in the literature for circa 700 rainwater samples collected in São Paulo State and Brasília airport, Brazil, were used to construct the following regional meteoric waterline (RMWL): δ2H V-SMOW (¿) = 8.06 δ18Owater V-SMOW (¿) + 12.85. The H-O isotopes of the studied groundwater samples show a δ18Owater variation of -14.1 to -5.3¿ V-SMOW, whereas the δ2H range was -66.5 to -31.7¿ V-SMOW, which was plotted on or near the RMWL, suggesting a meteoric origin for them. However, one hypothermal water sample (29°C) plotted away from this RMWL, and is from a deep fractured aquifer which mainly occurs in fenitization aureole rocks surrounding the carbonatite complex at Araxá spa, Minas Gerais State, and a magmatic hydrothermal water may contribute to this water sample. The use of both δ34Ssulfate and δ18Osulfate values in the selected sites permitted the plotting of a mixture line of the dissolved sulfate in the different aquifer systems of this study, considering two major sources as endmembers: sulfide oxidation, SOX (δ34Ssulfate= +1¿ and δ18Osulfate= +1¿) and sulfates possessing δ34Ssulfate= +9¿ and δ18Osulfate= +21¿ (OSW). This is an unusual isotopic composition opposite from that of sea water. The δ34Ssulfate and δ18Osulfate values tend to increase with increase in dissolved sulfate concentration. The O-S isotopes signatures that deviated from the general mixture line could be due to several processes, including atmospheric deposition, SO2 oxidation in the atmosphere, soil-derived sulfate, sulfide oxidation, evaporites dissolution and the presence of dissimilatory sulfate-reducing bacteria. Three sulfate isotope composition of spring waters from Águas da Prata spa in the Poços de Caldas alkaline massif (PCAM) represented endmember sources that defined a triangle around the remaining PCAM samples, as well as the samples from the crystalline basement, São Francisco craton, and Alto Paranaíba igneous province (APIP). Such triangle allows for estimation of the relative isotopic contribution in the different spas groundwaters, which is a new approach that focuses on the use of δ34Ssulfate-δ18Osulfate pair in environmental studies, and shows its usefulness in addition to other conventional hydrogeochemical fingerprints.Elsevier B.V.2020202220202020info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion42 p.application/pdfhttps://hdl.handle.net/2445/162000Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.gexplo.2019.106452Journal of Geochemical Exploration, 2020, vol. 210 , num. 106452https://doi.org/10.1016/j.gexplo.2019.106452cc-by-nc-nd (c) Elsevier B.V., 2020http://creativecommons.org/licenses/by-nc-nd/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1620002026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
Stable isotopes (H, O, S) signatures evidencing evolutionary trends of Brazilian spas groundwaters |
| title |
Stable isotopes (H, O, S) signatures evidencing evolutionary trends of Brazilian spas groundwaters |
| spellingShingle |
Stable isotopes (H, O, S) signatures evidencing evolutionary trends of Brazilian spas groundwaters Soler i Gil, Albert Isòtops estables en ecologia Hidrologia d'aigües subterrànies Brasil Stable isotopes in ecological research Groundwater hydrology Brazil |
| title_short |
Stable isotopes (H, O, S) signatures evidencing evolutionary trends of Brazilian spas groundwaters |
| title_full |
Stable isotopes (H, O, S) signatures evidencing evolutionary trends of Brazilian spas groundwaters |
| title_fullStr |
Stable isotopes (H, O, S) signatures evidencing evolutionary trends of Brazilian spas groundwaters |
| title_full_unstemmed |
Stable isotopes (H, O, S) signatures evidencing evolutionary trends of Brazilian spas groundwaters |
| title_sort |
Stable isotopes (H, O, S) signatures evidencing evolutionary trends of Brazilian spas groundwaters |
| dc.creator.none.fl_str_mv |
Soler i Gil, Albert Bonotto, D.M. |
| author |
Soler i Gil, Albert |
| author_facet |
Soler i Gil, Albert Bonotto, D.M. |
| author_role |
author |
| author2 |
Bonotto, D.M. |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Isòtops estables en ecologia Hidrologia d'aigües subterrànies Brasil Stable isotopes in ecological research Groundwater hydrology Brazil |
| topic |
Isòtops estables en ecologia Hidrologia d'aigües subterrànies Brasil Stable isotopes in ecological research Groundwater hydrology Brazil |
| description |
This paper reports a stable isotope (H, O, S) study of groundwater samples (25) in 10 spas from southeast Brazil. They are cold (25°C, 36%), hypothermal (25-33°C, 60%) and mesothermal (33-36°C, 4%) waters; and are predominantly composed of bicarbonate, carbonate and sodium. Dissolved sulfate is the dominant anion in one water sample and its concentration increased with increase in pH, electrical conductivity (EC) and total dissolved solids (TDS) values in the samples. 2H and 18O data reported in the literature for circa 700 rainwater samples collected in São Paulo State and Brasília airport, Brazil, were used to construct the following regional meteoric waterline (RMWL): δ2H V-SMOW (¿) = 8.06 δ18Owater V-SMOW (¿) + 12.85. The H-O isotopes of the studied groundwater samples show a δ18Owater variation of -14.1 to -5.3¿ V-SMOW, whereas the δ2H range was -66.5 to -31.7¿ V-SMOW, which was plotted on or near the RMWL, suggesting a meteoric origin for them. However, one hypothermal water sample (29°C) plotted away from this RMWL, and is from a deep fractured aquifer which mainly occurs in fenitization aureole rocks surrounding the carbonatite complex at Araxá spa, Minas Gerais State, and a magmatic hydrothermal water may contribute to this water sample. The use of both δ34Ssulfate and δ18Osulfate values in the selected sites permitted the plotting of a mixture line of the dissolved sulfate in the different aquifer systems of this study, considering two major sources as endmembers: sulfide oxidation, SOX (δ34Ssulfate= +1¿ and δ18Osulfate= +1¿) and sulfates possessing δ34Ssulfate= +9¿ and δ18Osulfate= +21¿ (OSW). This is an unusual isotopic composition opposite from that of sea water. The δ34Ssulfate and δ18Osulfate values tend to increase with increase in dissolved sulfate concentration. The O-S isotopes signatures that deviated from the general mixture line could be due to several processes, including atmospheric deposition, SO2 oxidation in the atmosphere, soil-derived sulfate, sulfide oxidation, evaporites dissolution and the presence of dissimilatory sulfate-reducing bacteria. Three sulfate isotope composition of spring waters from Águas da Prata spa in the Poços de Caldas alkaline massif (PCAM) represented endmember sources that defined a triangle around the remaining PCAM samples, as well as the samples from the crystalline basement, São Francisco craton, and Alto Paranaíba igneous province (APIP). Such triangle allows for estimation of the relative isotopic contribution in the different spas groundwaters, which is a new approach that focuses on the use of δ34Ssulfate-δ18Osulfate pair in environmental studies, and shows its usefulness in addition to other conventional hydrogeochemical fingerprints. |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020 2020 2020 2022 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion |
| format |
article |
| status_str |
acceptedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/162000 |
| url |
https://hdl.handle.net/2445/162000 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Versió postprint del document publicat a: https://doi.org/10.1016/j.gexplo.2019.106452 Journal of Geochemical Exploration, 2020, vol. 210 , num. 106452 https://doi.org/10.1016/j.gexplo.2019.106452 |
| dc.rights.none.fl_str_mv |
cc-by-nc-nd (c) Elsevier B.V., 2020 http://creativecommons.org/licenses/by-nc-nd/3.0/es info:eu-repo/semantics/openAccess |
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cc-by-nc-nd (c) Elsevier B.V., 2020 http://creativecommons.org/licenses/by-nc-nd/3.0/es |
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openAccess |
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42 p. application/pdf |
| dc.publisher.none.fl_str_mv |
Elsevier B.V. |
| publisher.none.fl_str_mv |
Elsevier B.V. |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Recercat. Dipósit de la Recerca de Catalunya |
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Recercat. Dipósit de la Recerca de Catalunya |
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