Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil : 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature.
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFOP |
Texto Completo: | http://www.repositorio.ufop.br/handle/123456789/13262 http://dx.doi.org/10.11606/issn.2316-9095.v20-151049 |
Resumo: | This article presents geochemical characteristics of the alkaline rocks of Rio Bonito intrusive complex, State of Rio de Janeiro, Brazil, which is constituted mainly by nepheline syenite. The fractional crystallisation of this magma decreases K2 O/(Na2 O + K2 O) and increases (Na + K)/Al. The TiO2 , Fe2 O3 *, MgO, CaO, and P2 O5 contents indicate fractionation of titanite, ilmenite, and clinopyroxene or amphibole. The total rare earth elements (REEs) are high, and the REE pattern is linear with negative gradient. The nepheline syenite aplite has low REEs, concave REE pattern, and positive Eu anomaly. The ultrabasic and basic mela-nepheline syenite samples have total REEs and light REEs higher than the felsic alkaline rocks. Therefore, the nepheline syenite magma is not derived directly from the alkaline ultrabasic magma. Laser-spot step-heating 40Ar/39Ar ages for biotite and amphibole are 65.03 ± 0.70 and 65.03 ± 0.46. U-Pb ages LA-ICP-MS for two samples are 65.49 ± 0.30 and 65.18 ± 0.30. Values of εHf are negative for both samples, indicating an important crustal component in the evolution of Rio Bonito. |
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Silva, Daniel Adelino daMotoki, AkihisaSantos, Anderson Costa dosMendes, JulioJourdan, FredGeraldes, Mauro CésarLana, Cristiano de Carvalho2021-06-07T19:48:48Z2021-06-07T19:48:48Z2020SILVA, D. A. da. et al. Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil: 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. Geologia USP. Série Científica, São Paulo, v. 20, n. 4, p. 221-234, dez. 2020. Disponível em: <http://www.ppegeo.igc.usp.br/index.php/GUSPSC/article/view/13729>. Acesso em: 19 fev. 2021.2316-9095http://www.repositorio.ufop.br/handle/123456789/13262http://dx.doi.org/10.11606/issn.2316-9095.v20-151049This article presents geochemical characteristics of the alkaline rocks of Rio Bonito intrusive complex, State of Rio de Janeiro, Brazil, which is constituted mainly by nepheline syenite. The fractional crystallisation of this magma decreases K2 O/(Na2 O + K2 O) and increases (Na + K)/Al. The TiO2 , Fe2 O3 *, MgO, CaO, and P2 O5 contents indicate fractionation of titanite, ilmenite, and clinopyroxene or amphibole. The total rare earth elements (REEs) are high, and the REE pattern is linear with negative gradient. The nepheline syenite aplite has low REEs, concave REE pattern, and positive Eu anomaly. The ultrabasic and basic mela-nepheline syenite samples have total REEs and light REEs higher than the felsic alkaline rocks. Therefore, the nepheline syenite magma is not derived directly from the alkaline ultrabasic magma. Laser-spot step-heating 40Ar/39Ar ages for biotite and amphibole are 65.03 ± 0.70 and 65.03 ± 0.46. U-Pb ages LA-ICP-MS for two samples are 65.49 ± 0.30 and 65.18 ± 0.30. Values of εHf are negative for both samples, indicating an important crustal component in the evolution of Rio Bonito.Este artigo apresenta características geoquímicas das rochas alcalinas do complexo intrusivo de Rio Bonito, estado do Rio de Janeiro, Brasil, que é constituído principalmente por nefelina sienito. A cristalização fracionada desse magma diminui K2 O/(Na2 O + K2 O) e aumenta (Na + K)/Al. Os conteúdos de TiO2 , Fe2 O3 *, MgO, CaO e P2 O5 indicam fracionamento de titanita, ilmenita, clinopiroxênio e anfibólio. O total de terras raras é alto, e o padrão é linear com gradiente negativo. O nefelina sienito aplito tem concentrações de terras raras baixas com padrão côncavo e anomalia positiva de Eu. As amostras de mela-nefelina sienito ultrabásico e básico têm total de terras raras e terras raras leves maiores que as rochas alcalinas félsicas. Portanto, o magma nefelina sienítico não é derivado diretamente do magma alcalino ultrabásico. Idades 40Ar/39Ar step-heating para biotita e anfibólio são 65,03 ± 0,70 e 65,03 ± 0,46. Idades U-Pb LA-ICP-MS de duas amostras são 65,49 ± 0,30 e 65,18 ± 0,30. Os valores de εHf são negativos para ambas as amostras, indicando um importante componente crustal na evolução de Rio Bonito.O periódico Geologia USP. Série Científica permite que o Repositório Institucional da Universidade Federal de Ouro Preto (UFOP) deposite uma cópia eletrônica dos artigos publicados por esse periódico em que ao menos um dos autores faça parte da comunidade cientifica da UFOP. Fonte: Licença concedida mediante preenchimento de formulário enviado em 20 ago. 2014.info:eu-repo/semantics/openAccessNepheline syeniteRio BonitoFractional crystallisationCrustal assimilation40Ar/39Ar and U-Pb datingMultiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil : 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature.Múltiplos processos de evolução geoquímica para as rochas alcalinas do complexo intrusivo de Rio Bonito, Estado do Rio de Janeiro, Brasil : idades 40Ar/39Ar e U-Pb e isótopos Lu-Hf em zircão – considerações sobre assinatura crustal.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-8924http://www.repositorio.ufop.br/bitstream/123456789/13262/2/license.txt62604f8d955274beb56c80ce1ee5dcaeMD52ORIGINALARTIGO_MultipleProcessesGeochemical.pdfARTIGO_MultipleProcessesGeochemical.pdfapplication/pdf13150896http://www.repositorio.ufop.br/bitstream/123456789/13262/1/ARTIGO_MultipleProcessesGeochemical.pdf096e9ef6e6bf25c1421072fa1c721926MD51123456789/132622021-06-07 15:48:48.863oai:localhost: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ório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332021-06-07T19:48:48Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false |
dc.title.pt_BR.fl_str_mv |
Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil : 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. |
dc.title.alternative.pt_BR.fl_str_mv |
Múltiplos processos de evolução geoquímica para as rochas alcalinas do complexo intrusivo de Rio Bonito, Estado do Rio de Janeiro, Brasil : idades 40Ar/39Ar e U-Pb e isótopos Lu-Hf em zircão – considerações sobre assinatura crustal. |
title |
Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil : 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. |
spellingShingle |
Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil : 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. Silva, Daniel Adelino da Nepheline syenite Rio Bonito Fractional crystallisation Crustal assimilation 40Ar/39Ar and U-Pb dating |
title_short |
Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil : 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. |
title_full |
Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil : 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. |
title_fullStr |
Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil : 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. |
title_full_unstemmed |
Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil : 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. |
title_sort |
Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil : 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. |
author |
Silva, Daniel Adelino da |
author_facet |
Silva, Daniel Adelino da Motoki, Akihisa Santos, Anderson Costa dos Mendes, Julio Jourdan, Fred Geraldes, Mauro César Lana, Cristiano de Carvalho |
author_role |
author |
author2 |
Motoki, Akihisa Santos, Anderson Costa dos Mendes, Julio Jourdan, Fred Geraldes, Mauro César Lana, Cristiano de Carvalho |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Silva, Daniel Adelino da Motoki, Akihisa Santos, Anderson Costa dos Mendes, Julio Jourdan, Fred Geraldes, Mauro César Lana, Cristiano de Carvalho |
dc.subject.por.fl_str_mv |
Nepheline syenite Rio Bonito Fractional crystallisation Crustal assimilation 40Ar/39Ar and U-Pb dating |
topic |
Nepheline syenite Rio Bonito Fractional crystallisation Crustal assimilation 40Ar/39Ar and U-Pb dating |
description |
This article presents geochemical characteristics of the alkaline rocks of Rio Bonito intrusive complex, State of Rio de Janeiro, Brazil, which is constituted mainly by nepheline syenite. The fractional crystallisation of this magma decreases K2 O/(Na2 O + K2 O) and increases (Na + K)/Al. The TiO2 , Fe2 O3 *, MgO, CaO, and P2 O5 contents indicate fractionation of titanite, ilmenite, and clinopyroxene or amphibole. The total rare earth elements (REEs) are high, and the REE pattern is linear with negative gradient. The nepheline syenite aplite has low REEs, concave REE pattern, and positive Eu anomaly. The ultrabasic and basic mela-nepheline syenite samples have total REEs and light REEs higher than the felsic alkaline rocks. Therefore, the nepheline syenite magma is not derived directly from the alkaline ultrabasic magma. Laser-spot step-heating 40Ar/39Ar ages for biotite and amphibole are 65.03 ± 0.70 and 65.03 ± 0.46. U-Pb ages LA-ICP-MS for two samples are 65.49 ± 0.30 and 65.18 ± 0.30. Values of εHf are negative for both samples, indicating an important crustal component in the evolution of Rio Bonito. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2021-06-07T19:48:48Z |
dc.date.available.fl_str_mv |
2021-06-07T19:48:48Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
SILVA, D. A. da. et al. Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil: 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. Geologia USP. Série Científica, São Paulo, v. 20, n. 4, p. 221-234, dez. 2020. Disponível em: <http://www.ppegeo.igc.usp.br/index.php/GUSPSC/article/view/13729>. Acesso em: 19 fev. 2021. |
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http://www.repositorio.ufop.br/handle/123456789/13262 |
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2316-9095 |
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http://dx.doi.org/10.11606/issn.2316-9095.v20-151049 |
identifier_str_mv |
SILVA, D. A. da. et al. Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil: 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature. Geologia USP. Série Científica, São Paulo, v. 20, n. 4, p. 221-234, dez. 2020. Disponível em: <http://www.ppegeo.igc.usp.br/index.php/GUSPSC/article/view/13729>. Acesso em: 19 fev. 2021. 2316-9095 |
url |
http://www.repositorio.ufop.br/handle/123456789/13262 http://dx.doi.org/10.11606/issn.2316-9095.v20-151049 |
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