Crustal growth in the 3.4-2.7Ga São José de Campestre Massif, Borborema Province, NE Brazil

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dc.contributor.authorDantas, Elton Luiz
dc.contributor.authorDe Souza, Zorano Sérgio
dc.contributor.authorWernick, Eberhard [UNESP]
dc.contributor.authorHackspacher, Peter Christian [UNESP]
dc.contributor.authorMartin, Hervé
dc.contributor.authorXiaodong, Deng
dc.contributor.authorLi, Jian-Wei
dc.contributor.institutionUniversidade de Brasília (UnB)
dc.contributor.institutionUniversidade Federal do Rio Grande do Norte (UFRN)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversité Blaise Pascal 5
dc.contributor.institutionChina University of Geosciences
dc.date.accessioned2014-05-27T11:28:45Z
dc.date.available2014-05-27T11:28:45Z
dc.date.issued2013-04-01
dc.description.abstractThe Archean (3.45-2.70Ga) rocks of the São José do Campestre Massif (SJCM) in the Borborema Province (NE Brazil) make up a small area (~6000km2) and are composed of granitoids and metasupracrustal rocks that define a complex magmatic and deformational history. The massif provides the opportunity to study mantle- and crustal-derived magmas generated since the Palaeoarchean. The orthogneisses of the SJCM are composed of: (1) tonalite to granodiorite with diorite enclaves (Bom Jesus gneiss, 3412±8Ma; TDM Nd model ages from 4.1 to 3.5Ga and negative epsilon Nd values); (2) biotite and ferroan-diopside monzogranite (Presidente Juscelino complex, 3356±21Ma and 3251±44Ma; TDM model ages range from 4.1 to 3.4Ga and epsilon Nd values that are slightly positive to negative); (3) hornblende tonalite to granodiorite (Brejinho complex, 3333±77Ma and 3187±8Ma; dominantly positive epsilon Nd values and TDM ages from 3.6 to 3.2Ga); (4) biotite monzogranite (São Pedro do Potengi gneiss, 3120±22Ma; TDM =3.5Ga; negative epsilon Nd value); (5) ferroan-diopside-grossular anorthosite and metagabbro (Senador Elói de Souza complex, 3033±3Ma); and (6) quartz diorite to syenogranite (São José do Campestre complex; 2685±9Ma and 2655±4Ma; negative epsilon Nd values and TDM ages from 3.9 to 3.3Ga). The orthogneisses are subalkaline to faintly alkaline, magnesian to ferroan, M- and I-type granitoids that follow either the K-enrichment or the trondhjemite trends. Each group has a subset with REE characteristics similar to Archean TTG and another that is analogous to Phanerozoic granitoids. They have negative Ta-Nb and Ti anomalies and have trace element contents of granitoids from subduction zones. Geochemical and Nd isotope data suggest that subducted oceanic crust and a depleted and metasomatised mantle wedge both acted as the magma sources. We propose a convergent tectonic model in which hybridisation of the upper mantle occurs through interactions with adakitic or trondhjemitic melts and recycling of earlier crust. The results imply that both the subducted oceanic crust and the mantle wedge played major roles in continent formation throughout successive episodes of arc accretion in Palaeo- and Mesoarchean times. The Archean rocks of the SJCM shares some similarities with the Pilbara, Kaapvaal, West African, and São Francisco cratons. However, the most reliable comparisons with the SJCM are with the neighbouring basement of the Nigeria and Cameroon shields. © 2012 Elsevier B.V.en
dc.description.affiliationInstituto de Geociências UnB, Brasília
dc.description.affiliationPós-Graduação em Geodinâmica e Geofísica Departamento de Geologia UFRN, Natal
dc.description.affiliationDepartamento de Mineralogia e Petrologia UNESP, Rio Claro
dc.description.affiliationLaboratoire Magmas et Volcans OPGC, CNRS, IRD Université Blaise Pascal 5, Rue Kessler 63038, Clermont-Ferrand Cedex
dc.description.affiliationState Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences, Hubei Province 430074 Wuhan
dc.description.affiliationUnespDepartamento de Mineralogia e Petrologia UNESP, Rio Claro
dc.format.extent120-156
dc.identifierhttp://dx.doi.org/10.1016/j.precamres.2012.08.006
dc.identifier.citationPrecambrian Research, v. 227, p. 120-156.
dc.identifier.doi10.1016/j.precamres.2012.08.006
dc.identifier.issn0301-9268
dc.identifier.lattes1040135935908734
dc.identifier.orcid0000-0003-2125-3050
dc.identifier.scopus2-s2.0-84875217855
dc.identifier.urihttp://hdl.handle.net/11449/74941
dc.identifier.wosWOS:000316771800007
dc.language.isoeng
dc.relation.ispartofPrecambrian Research
dc.relation.ispartofjcr3.907
dc.relation.ispartofsjr2,769
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectArchean
dc.subjectCrustal growth
dc.subjectMagmatic accretion
dc.subjectNE Brazil
dc.subjectRecycling
dc.subjectaccretion
dc.subjectcrustal structure
dc.subjectgranitoid
dc.subjectmagma
dc.subjectmantle structure
dc.subjectorthogneiss
dc.subjectBorborema
dc.subjectBrazil
dc.titleCrustal growth in the 3.4-2.7Ga São José de Campestre Massif, Borborema Province, NE Brazilen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
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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