Hydrochemical and isotopic interpretation of thermal waters from the Felgueira area (Central Portugal)
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/24885 |
Resumo: | The hydrothermal system of Felgueira has long been appreciated for the recreational and therapeutic benefits of the thermal baths. In order to protect and maintain these thermal resources it is necessary to understand the characteristics of these waters and determine its origin and that of its solutes. In this paper we use chemical and isotopic data as tools for addressing some of those questions. Early Holocene meteoric waters reacted, at low reservoir temperatures, with minerals from a granite aquifer, in an environment with available deep CO2, thus acquiring a sodium bicarbonate-chloride composition, with alkaline and strongly reducing characteristics. Biogenic sulphate reduction results in a wide variation of the S isotopic composition of both oxidized and reduced sulphur species. The drawdown imposed by exploitation wells results in some degree of vulnerability of the hydrothermal system. |
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Hydrochemical and isotopic interpretation of thermal waters from the Felgueira area (Central Portugal)Hydrogeochemical studyThermal waters (Portugal)Mineral-solution equilibriaGeothermometryIsotopes C, SChemical monitoringThe hydrothermal system of Felgueira has long been appreciated for the recreational and therapeutic benefits of the thermal baths. In order to protect and maintain these thermal resources it is necessary to understand the characteristics of these waters and determine its origin and that of its solutes. In this paper we use chemical and isotopic data as tools for addressing some of those questions. Early Holocene meteoric waters reacted, at low reservoir temperatures, with minerals from a granite aquifer, in an environment with available deep CO2, thus acquiring a sodium bicarbonate-chloride composition, with alkaline and strongly reducing characteristics. Biogenic sulphate reduction results in a wide variation of the S isotopic composition of both oxidized and reduced sulphur species. The drawdown imposed by exploitation wells results in some degree of vulnerability of the hydrothermal system.Fundação para a Ciência e TecnologiaBirkle & Torres-Alvarado2010-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/24885http://hdl.handle.net/10316/24885eng978-0-415-60426-0http://www.crcpress.com/product/isbn/9780415604260Morais, Manuelinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-05-25T11:33:38Zoai:estudogeral.uc.pt:10316/24885Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:52:22.966058Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Hydrochemical and isotopic interpretation of thermal waters from the Felgueira area (Central Portugal) |
title |
Hydrochemical and isotopic interpretation of thermal waters from the Felgueira area (Central Portugal) |
spellingShingle |
Hydrochemical and isotopic interpretation of thermal waters from the Felgueira area (Central Portugal) Morais, Manuel Hydrogeochemical study Thermal waters (Portugal) Mineral-solution equilibria Geothermometry Isotopes C, S Chemical monitoring |
title_short |
Hydrochemical and isotopic interpretation of thermal waters from the Felgueira area (Central Portugal) |
title_full |
Hydrochemical and isotopic interpretation of thermal waters from the Felgueira area (Central Portugal) |
title_fullStr |
Hydrochemical and isotopic interpretation of thermal waters from the Felgueira area (Central Portugal) |
title_full_unstemmed |
Hydrochemical and isotopic interpretation of thermal waters from the Felgueira area (Central Portugal) |
title_sort |
Hydrochemical and isotopic interpretation of thermal waters from the Felgueira area (Central Portugal) |
author |
Morais, Manuel |
author_facet |
Morais, Manuel |
author_role |
author |
dc.contributor.author.fl_str_mv |
Morais, Manuel |
dc.subject.por.fl_str_mv |
Hydrogeochemical study Thermal waters (Portugal) Mineral-solution equilibria Geothermometry Isotopes C, S Chemical monitoring |
topic |
Hydrogeochemical study Thermal waters (Portugal) Mineral-solution equilibria Geothermometry Isotopes C, S Chemical monitoring |
description |
The hydrothermal system of Felgueira has long been appreciated for the recreational and therapeutic benefits of the thermal baths. In order to protect and maintain these thermal resources it is necessary to understand the characteristics of these waters and determine its origin and that of its solutes. In this paper we use chemical and isotopic data as tools for addressing some of those questions. Early Holocene meteoric waters reacted, at low reservoir temperatures, with minerals from a granite aquifer, in an environment with available deep CO2, thus acquiring a sodium bicarbonate-chloride composition, with alkaline and strongly reducing characteristics. Biogenic sulphate reduction results in a wide variation of the S isotopic composition of both oxidized and reduced sulphur species. The drawdown imposed by exploitation wells results in some degree of vulnerability of the hydrothermal system. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-10-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/24885 http://hdl.handle.net/10316/24885 |
url |
http://hdl.handle.net/10316/24885 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
978-0-415-60426-0 http://www.crcpress.com/product/isbn/9780415604260 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Birkle & Torres-Alvarado |
publisher.none.fl_str_mv |
Birkle & Torres-Alvarado |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
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1799133811389235200 |