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Sm-Nd system in total rock open versus closed isotopic composition in zones of high deformation

dc.contributor.authorDantas, Elton Luiz
dc.contributor.authorHackspacher, Peter Christian [UNESP]
dc.contributor.authorMagini, Christiano
dc.contributor.authorLegrand, Jean Michel
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.date.accessioned2014-05-27T11:20:35Z
dc.date.available2014-05-27T11:20:35Z
dc.date.issued2002-12-01
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.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.format.extent109-129
dc.identifier.citationGeologia USP - Serie Cientifica, v. 2, n. 1, p. 109-129, 2002.
dc.identifier.issn1519-874X
dc.identifier.lattes1040135935908734
dc.identifier.orcid0000-0003-2125-3050
dc.identifier.scopus2-s2.0-0141460444
dc.identifier.urihttp://hdl.handle.net/11449/67143
dc.language.isoeng
dc.relation.ispartofGeologia USP: Serie Cientifica
dc.rights.accessRightsAcesso restrito
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.typeArtigo
dcterms.licensehttp://www.revistas.usp.br/guspsc/about/editorialPolicies#openAccessPolicy
dspace.entity.typePublication
unesp.author.lattes1040135935908734[2]
unesp.author.orcid0000-0003-2125-3050[2]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Geociências e Ciências Exatas, Rio Claropt
unesp.departmentPetrologia e Metalogenia - IGCEpt

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