Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/26625 |
Resumo: | The geochemical composition of rare earth elements (REE) in the bottom sediments from two Dominican reservoirs, in soils and rocks from respective drainage basins, was studied in order to identify the possible sources of the deposited materials. The REE contents of the 3 components were normalized to NASC, and the light/heavy REE ratio, the Ce and Eu anomalies and a few fractionation parameters were determined. The data point to a clear depletion of REE from the sources, an enrichment in light REE and in some middle elements (Eu, Er), positive anomalies of Eu and mostly positive of Ce, which represents the element with greater spatial and temporal variation, related to chemical variation of the environment. The REE distribution patterns are notoriously more homogeneous in sediments, revealing a uniform sedimentation over the reservoirs and between distinct seasonal periods, not allowing the definition of sources for each reservoir sector. Bivariate diagrams between the fractioning parameters of light-middle-heavy REE, where the data of sediments, soils and rocks were plotted, allowed a good discrimination of the main sources of the materials deposited in these reservoirs. |
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Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanasGeochemistry of Rare Earth Elements (REE) as a fingerprint of sediment provenance in Dominican Dam ReservoirsGeochemical analysisRare earth elementsSediments provenanceDominican dam reservoirsThe geochemical composition of rare earth elements (REE) in the bottom sediments from two Dominican reservoirs, in soils and rocks from respective drainage basins, was studied in order to identify the possible sources of the deposited materials. The REE contents of the 3 components were normalized to NASC, and the light/heavy REE ratio, the Ce and Eu anomalies and a few fractionation parameters were determined. The data point to a clear depletion of REE from the sources, an enrichment in light REE and in some middle elements (Eu, Er), positive anomalies of Eu and mostly positive of Ce, which represents the element with greater spatial and temporal variation, related to chemical variation of the environment. The REE distribution patterns are notoriously more homogeneous in sediments, revealing a uniform sedimentation over the reservoirs and between distinct seasonal periods, not allowing the definition of sources for each reservoir sector. Bivariate diagrams between the fractioning parameters of light-middle-heavy REE, where the data of sediments, soils and rocks were plotted, allowed a good discrimination of the main sources of the materials deposited in these reservoirs.Universidade de Évora2020-01-24T12:19:12Z2020-01-242019-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/26625http://hdl.handle.net/10174/26625engFonseca, R.,Araújo, J.,Pinho, C.,Nogueira, P.,Araújo, A. (2019). Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas, XII Congresso Ibérico de Geoquímica, Extended abstracts, P. 35-38.978-972-778-121-8GEOrfonseca@uevora.ptjfaraujo@uevora.ptc_pinho@uevora.ptpmn@uevora.ptaaraujo@uevora.pt250Fonseca, RitaAraújo, JoanaPinho, CatarinaNogueira, PedroAraújo, Alexandreinfo: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:RCAAP2024-01-03T19:21:37Zoai:dspace.uevora.pt:10174/26625Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:16:55.940627Repositório 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 |
Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas Geochemistry of Rare Earth Elements (REE) as a fingerprint of sediment provenance in Dominican Dam Reservoirs |
title |
Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas |
spellingShingle |
Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas Fonseca, Rita Geochemical analysis Rare earth elements Sediments provenance Dominican dam reservoirs |
title_short |
Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas |
title_full |
Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas |
title_fullStr |
Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas |
title_full_unstemmed |
Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas |
title_sort |
Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas |
author |
Fonseca, Rita |
author_facet |
Fonseca, Rita Araújo, Joana Pinho, Catarina Nogueira, Pedro Araújo, Alexandre |
author_role |
author |
author2 |
Araújo, Joana Pinho, Catarina Nogueira, Pedro Araújo, Alexandre |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Fonseca, Rita Araújo, Joana Pinho, Catarina Nogueira, Pedro Araújo, Alexandre |
dc.subject.por.fl_str_mv |
Geochemical analysis Rare earth elements Sediments provenance Dominican dam reservoirs |
topic |
Geochemical analysis Rare earth elements Sediments provenance Dominican dam reservoirs |
description |
The geochemical composition of rare earth elements (REE) in the bottom sediments from two Dominican reservoirs, in soils and rocks from respective drainage basins, was studied in order to identify the possible sources of the deposited materials. The REE contents of the 3 components were normalized to NASC, and the light/heavy REE ratio, the Ce and Eu anomalies and a few fractionation parameters were determined. The data point to a clear depletion of REE from the sources, an enrichment in light REE and in some middle elements (Eu, Er), positive anomalies of Eu and mostly positive of Ce, which represents the element with greater spatial and temporal variation, related to chemical variation of the environment. The REE distribution patterns are notoriously more homogeneous in sediments, revealing a uniform sedimentation over the reservoirs and between distinct seasonal periods, not allowing the definition of sources for each reservoir sector. Bivariate diagrams between the fractioning parameters of light-middle-heavy REE, where the data of sediments, soils and rocks were plotted, allowed a good discrimination of the main sources of the materials deposited in these reservoirs. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09-01T00:00:00Z 2020-01-24T12:19:12Z 2020-01-24 |
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/10174/26625 http://hdl.handle.net/10174/26625 |
url |
http://hdl.handle.net/10174/26625 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Fonseca, R.,Araújo, J.,Pinho, C.,Nogueira, P.,Araújo, A. (2019). Geoquímica de Elementos Terras Raras (ETRs) como indicadores da proveniência dos sedimentos de albufeiras dominicanas, XII Congresso Ibérico de Geoquímica, Extended abstracts, P. 35-38. 978-972-778-121-8 GEO rfonseca@uevora.pt jfaraujo@uevora.pt c_pinho@uevora.pt pmn@uevora.pt aaraujo@uevora.pt 250 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade de Évora |
publisher.none.fl_str_mv |
Universidade de Évora |
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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1799136651424825344 |