Evidence for 2.35 to 2.30 Ga juvenile crustal growth in the northwest Borborema Province, NE Brazil

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dc.contributor.authorDos Santos, Ticiano J.S.
dc.contributor.authorFetter, Allen H.
dc.contributor.authorVan Schmus, W. Randall
dc.contributor.authorHackspacher, Peter C. [UNESP]
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversity of Kansas (KU)
dc.contributor.institutionUS Nuclear Regulatory Commission
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:24:04Z
dc.date.available2014-05-27T11:24:04Z
dc.date.issued2009-12-01
dc.description.abstractThe c. 600 Ma Brasiliano Borborema Province of NE Brazil comprises a complex collage of Precambrian crustal blocks cut by a series of continental-scale shear zones. The predominant basement rocks in the province are 2.1-2.0 Ga Transamazonian gneisses of both juvenile and reworked nature. U-Pb zircon and Sm-Nd whole-rock studies of tonalite-trondhjemite-granodiorite basement gneisses in the NW Ceará or Médio Coreaú domain in the northwestern part of the Borborema Province indicate that this represents a continental fragment formed by 2.35-2.30 Ga juvenile crust. This block has no apparent genetic affinity with any other basement gneisses in the Borborema Province, and it does not represent the tectonized margin of the c. 2.1-2.0 Ga São Luis Craton to the NW. The petrological and geochemical characteristics, as well as the Nd-isotopic signatures of these gneisses, are consistent with their genesis in an island arc setting. This finding documents a period of crustal growth during a period of the Earth's history which is known for its tectonic quiescence and paucity of crust formation. © Geological Society of London 2009.en
dc.description.affiliationInstituto de Geociências Universidade Estadual de Campinas (UNICAMP), PO Box 6152, CEP 13081-970, Campinas, SP
dc.description.affiliationDepartment of Geology University of Kansas, Lawrence, Kansas 66045-7613
dc.description.affiliationUS Nuclear Regulatory Commission, 11555 Rockville Pike, Rockville, MD 20852
dc.description.affiliationInstituto de Geociências e Ciências Exatas Universidade Estadual Paulista (UNESP), PO Box 13506-900, Rio Claro, SP
dc.description.affiliationUnespInstituto de Geociências e Ciências Exatas Universidade Estadual Paulista (UNESP), PO Box 13506-900, Rio Claro, SP
dc.format.extent271-281
dc.identifierhttp://dx.doi.org/10.1144/SP323.13
dc.identifier.citationGeological Society Special Publication, v. 323, p. 271-281.
dc.identifier.doi10.1144/SP323.13
dc.identifier.issn0305-8719
dc.identifier.lattes1040135935908734
dc.identifier.orcid0000-0003-2125-3050
dc.identifier.scopus2-s2.0-74949114470
dc.identifier.urihttp://hdl.handle.net/11449/71309
dc.language.isoeng
dc.relation.ispartofGeological Society Special Publication
dc.relation.ispartofsjr0,902
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectbasement rock
dc.subjectcontinental margin
dc.subjectcrustal evolution
dc.subjectgeochemistry
dc.subjectgneiss
dc.subjectgranodiorite
dc.subjectisland arc
dc.subjectpetrology
dc.subjectPrecambrian
dc.subjectsamarium-neodymium dating
dc.subjectshear zone
dc.subjecttectonic evolution
dc.subjecttectonic setting
dc.subjecttonalite
dc.subjecttrondhjemite
dc.subjecturanium-lead dating
dc.subjectBorborema
dc.subjectBrazil
dc.titleEvidence for 2.35 to 2.30 Ga juvenile crustal growth in the northwest Borborema Province, NE Brazilen
dc.typeArtigo
dcterms.licensehttp://www.geolsoc.org.uk/author_terms
unesp.author.lattes1040135935908734[4]
unesp.author.orcid0000-0003-2125-3050[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Geociências e Ciências Exatas, Rio Claropt

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