O grupo araxá na região sul-sudoeste do estado de goiás

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dc.contributor.authorNavarro, Guillermo Rafael Beltran [UNESP]
dc.contributor.authorZanardo, Antenor [UNESP]
dc.contributor.authorDa Conceição, Fabiano Tomazini [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:29:38Z
dc.date.available2014-05-27T11:29:38Z
dc.date.issued2013-06-01
dc.description.abstractIn the S - SW region of Goiás State, Brazil, the Araxá Group is constituted of a metasedimentary sequence containing schistose and gneissic (garnet-biotite-quartz schists, feldspatic garnet-biotite-quartz schists, garnet-biotite-quartz paragneisses, with muscovite and locally amphibole, epidote, kyanite and staurolite. This sequence presents intercalations of metaul-tramafc rocks (serpentinite, actinolite schist, talc schist, chlorite schist), metamafc ones (amphibolite, amphibole schist containing or not garnet, garnet amphibolite) and associated granitic bodies. Chemically, the Araxá Group metasediments present peraluminous composition, showing enrichment in LILE, when compared with HFSE and REE, and displaying negative anomalies of Nb, Ta, Sr, P and Ti. Their chemical composition is that of greywake and the chemical characteristics of the sediments are generated in magmatic arcs. Isotopic data for Sm/Nd - model ages (TDM) between 1,04 - 1,51 and 1,76 - 2,26 Ga - and U/Pb (predominance of zircon with ages < 900 Ma) suggest that these metasediments have Neoproterozoic rocks as the source rocks. Chemical and isotopic characteristics of the studied metasediments suggest that their source are rocks originated in magmatic arcs and that they were deposited in a fore arc basin developed in the margins of Neoproterozoic island arcs.en
dc.description.affiliationDepartamento de Petrologia e Metalogenia - DPM Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP, Avenida 24-A 1515, Caixa Postal 178, Bela Vista, CEP 13506-900, Rio Claro, SP
dc.description.affiliationDepartamento de Planejamento Territorial e Geoprocessamento - DEPLAM Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP, Rio Claro, SP
dc.description.affiliationUnespDepartamento de Petrologia e Metalogenia - DPM Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP, Avenida 24-A 1515, Caixa Postal 178, Bela Vista, CEP 13506-900, Rio Claro, SP
dc.description.affiliationUnespDepartamento de Planejamento Territorial e Geoprocessamento - DEPLAM Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP, Rio Claro, SP
dc.format.extent5-28
dc.identifierhttp://dx.doi.org/10.5327/Z1519-874X2013000200002
dc.identifier.citationGeologia USP - Serie Cientifica, v. 13, n. 2, p. 5-28, 2013.
dc.identifier.doi10.5327/Z1519-874X2013000200002
dc.identifier.file2-s2.0-84884470379.pdf
dc.identifier.issn1519-874X
dc.identifier.lattes6893272900174059
dc.identifier.scopus2-s2.0-84884470379
dc.identifier.urihttp://hdl.handle.net/11449/75591
dc.language.isopor
dc.relation.ispartofGeologia USP: Serie Cientifica
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAraxágroup
dc.subjectBrasília Belt
dc.subjectGeochemistry
dc.subjectGeochronology Sm/Nd and U/Pb
dc.titleO grupo araxá na região sul-sudoeste do estado de goiáspt
dc.title.alternativeThe araxá group in the south-southwest region of the goiás stateen
dc.typeArtigo
dcterms.licensehttp://ppegeo.igc.usp.br/scielo.php?script=sci_serial&pid=1519-874X&lng=pt&nrm=iso
unesp.author.lattes6893272900174059
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Geociências e Ciências Exatas, Rio Claropt

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Artigos - Petrologia e Metalogenia - IGCE
Artigos - Planejamento Territorial e Geoprocessamento - IGCE