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dc.contributor.authorFischel, Danielle Piuzana-
dc.contributor.authorPimentel, Márcio Martins-
dc.contributor.authorFuck, Reinhardt Adolfo-
dc.contributor.authorArmstrong, Richard-
dc.date.accessioned2017-02-14T10:50:30Z-
dc.date.available2017-02-14T10:50:30Z-
dc.date.issued2001-09-
dc.identifier.citationFISCHEL, Danielle Piuzana et al. 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. Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 73, n. 3, p. 445-460, set. 2001. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000300012&lng=en&nrm=iso>. Acesso em: 02 jun. 2016. http://dx.doi.org/10.1590/S0001-37652001000300012.en
dc.identifier.urihttp://repositorio.unb.br/handle/10482/22506-
dc.language.isoInglêsen
dc.publisherAcademia Brasileira de Ciênciasen
dc.rightsAcesso Abertoen
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 Brazilen
dc.typeArtigoen
dc.subject.keywordRochasen
dc.subject.keywordGeocronologiaen
dc.subject.keywordGranitoen
dc.rights.licenseAnais 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.en
dc.identifier.doihttp://dx.doi.org/10.1590/S0001-37652001000300012en
dc.description.abstract1U-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.en
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