U-Pb SHRIMP and Sm-Nd geochronology of the Silvânia Volcanics and Jurubatuba Granite : juvenile paleoproterozoic crust in the basement of the neoproterozoic Brasília belt, Goiás, central Brazil

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorFischel, Danielle Piuzana-
Autor(es): dc.creatorPimentel, Márcio Martins-
Autor(es): dc.creatorFuck, Reinhardt Adolfo-
Autor(es): dc.creatorArmstrong, Richard-
Data de aceite: dc.date.accessioned2021-10-14T18:43:41Z-
Data de disponibilização: dc.date.available2021-10-14T18:43:41Z-
Data de envio: dc.date.issued2017-02-14-
Data de envio: dc.date.issued2017-02-14-
Data de envio: dc.date.issued2001-09-
Fonte completa do material: dc.identifierhttp://repositorio.unb.br/handle/10482/22506-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1590/S0001-37652001000300012-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/638549-
Descrição: dc.descriptionU-Pb SHRIMP and Sm-Nd isotopic ages were determined for felsic metavolcanic rocks from the Silvânia Sequence and Jurubatuba Granite in the central part of the Brasília Belt. Zircon grains from a metavolcanic sample yielded 2115 ± 23 Ma and from the granite yielded 2089 ± 14 Ma, interpreted as crystallization ages of these rocks. Six metavolcanic samples of the Silvânia Sequence yielded a six-point whole-rock Sm-Nd isochron indicating a crystallization age of 2262 ± 110 Ma and positive eNd(T) = +3.0 interpreted as a juvenile magmatic event. Nd isotopic analyses on samples from the Jurubatuba Granite have Paleoproterozoic TDM model ages between 2.30 and 2.42 Ga and eNd(T) values vary between -0.22 and -0.58. The oldest TDM value refers to a sedimentary xenolith in the granite. These results suggest crystallization ages of Silvânia volcanics and Jurubatuba Granite are the first evidence of a ca. 2.14-2.08 juvenile magmatic event in the basement of the central part of the Brasília Belt that implies the presence of arc/suture hidden in reworked basement of the Brasília Belt.-
Formato: dc.formatapplication/pdf-
Publicador: dc.publisherAcademia Brasileira de Ciências-
Direitos: dc.rightsAcesso Aberto-
Direitos: dc.rightsAnais da Academia Brasileira de Ciências - All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License (Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000300012&lng=en&nrm=iso&tlng=en. Acesso em: 02 jun. 2016.-
Palavras-chave: dc.subjectRochas-
Palavras-chave: dc.subjectGeocronologia-
Palavras-chave: dc.subjectGranito-
Título: dc.titleU-Pb SHRIMP and Sm-Nd geochronology of the Silvânia Volcanics and Jurubatuba Granite : juvenile paleoproterozoic crust in the basement of the neoproterozoic Brasília belt, Goiás, central Brazil-
Tipo de arquivo: dc.typelivro digital-
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