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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/67143
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dc.contributor.authorDantas, Elton Luiz-
dc.contributor.authorHackspacher, Peter Christian-
dc.contributor.authorMagini, Christiano-
dc.contributor.authorLegrand, Jean Michel-
dc.date.accessioned2014-05-27T11:20:35Z-
dc.date.accessioned2016-10-25T18:18:19Z-
dc.date.available2014-05-27T11:20:35Z-
dc.date.available2016-10-25T18:18:19Z-
dc.date.issued2002-12-01-
dc.identifier.citationGeologia USP - Serie Cientifica, v. 2, n. 1, p. 109-129, 2002.-
dc.identifier.issn1519-874X-
dc.identifier.urihttp://hdl.handle.net/11449/67143-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/67143-
dc.description.abstractHigh strain shear zones of Brasiliano age, developed in Paleoproterozoic basement gneiss of the Caicó region, Borborema Province, NE Brazil, were associated with medium- to low-grade metamorphism and deformational processes that transformed porphyritic augen gneiss into muscovite quartzite, modifying their original mineralogy and chemical properties. During the last hydrothermal event mobility of major, minor and trace elements was great, whereas the pattern of Rare Earth Elements was not changed. We carried out a Sm-Nd isotopic study in these rocks in order to understand the behavior of Nd isotopes during mylonite generation. TDM model ages at around 2.6 Ga and εNd (t) values for both protolith and transformed rock suggest that the Nd isotopic system remained closed, recording the original source rock signature, despite undergoing two superposed metamorphic events. These new Sm-Nd results provide important information on the geologic evolution of basement rocks in the central Rio Grande do Norte Terrane of the Borborema Province, NE Brazil.en
dc.format.extent109-129-
dc.language.isoeng-
dc.sourceScopus-
dc.subjectClose system and mylonites-
dc.subjectNd isotopes-
dc.subjectdeformation-
dc.subjectisotopic composition-
dc.subjectmetamorphism-
dc.subjectmylonite-
dc.subjectpetrography-
dc.subjectProterozoic-
dc.subjectsamarium-neodymium dating-
dc.subjectshear zone-
dc.subjectBrazil-
dc.titleSm-Nd system in total rock open versus closed isotopic composition in zones of high deformationen
dc.typeoutro-
dc.contributor.institutionUniversidade de Brasília (UnB)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUNIMEP-
dc.contributor.institutionUniversidade Federal do Rio Grande do Norte (UFRN)-
dc.description.affiliationDepto. de Geologia Geral e Aplicada Instituto de Geociências UnB Campus Univ. Darcy Ribeiro, Brasília, DF CEP 70910-900-
dc.description.affiliationDepto. de Petrologia e Metalogenia UNESP, Rio Claro, SP-
dc.description.affiliationUniversidade Metodista de Piracicaba UNIMEP, Piracicaba, SP-
dc.description.affiliationInst. de Geociencias e Cie. Exatas UFRN, Natal, RN-
dc.description.affiliationUnespDepto. de Petrologia e Metalogenia UNESP, Rio Claro, SP-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofGeologia USP: Serie Cientifica-
dc.identifier.scopus2-s2.0-0141460444-
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