O grupo araxá na região sul-sudoeste do estado de goiás
dc.contributor.author | Navarro, Guillermo Rafael Beltran [UNESP] | |
dc.contributor.author | Zanardo, Antenor [UNESP] | |
dc.contributor.author | Da Conceição, Fabiano Tomazini [UNESP] | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-27T11:29:38Z | |
dc.date.available | 2014-05-27T11:29:38Z | |
dc.date.issued | 2013-06-01 | |
dc.description.abstract | In 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.affiliation | Departamento 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.affiliation | Departamento de Planejamento Territorial e Geoprocessamento - DEPLAM Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP, Rio Claro, SP | |
dc.description.affiliationUnesp | Departamento 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.affiliationUnesp | Departamento de Planejamento Territorial e Geoprocessamento - DEPLAM Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP, Rio Claro, SP | |
dc.format.extent | 5-28 | |
dc.identifier | http://dx.doi.org/10.5327/Z1519-874X2013000200002 | |
dc.identifier.citation | Geologia USP - Serie Cientifica, v. 13, n. 2, p. 5-28, 2013. | |
dc.identifier.doi | 10.5327/Z1519-874X2013000200002 | |
dc.identifier.file | 2-s2.0-84884470379.pdf | |
dc.identifier.issn | 1519-874X | |
dc.identifier.lattes | 6893272900174059 | |
dc.identifier.scopus | 2-s2.0-84884470379 | |
dc.identifier.uri | http://hdl.handle.net/11449/75591 | |
dc.language.iso | por | |
dc.relation.ispartof | Geologia USP: Serie Cientifica | |
dc.rights.accessRights | Acesso aberto | |
dc.source | Scopus | |
dc.subject | Araxágroup | |
dc.subject | Brasília Belt | |
dc.subject | Geochemistry | |
dc.subject | Geochronology Sm/Nd and U/Pb | |
dc.title | O grupo araxá na região sul-sudoeste do estado de goiás | pt |
dc.title.alternative | The araxá group in the south-southwest region of the goiás state | en |
dc.type | Artigo | |
dcterms.license | http://ppegeo.igc.usp.br/scielo.php?script=sci_serial&pid=1519-874X&lng=pt&nrm=iso | |
unesp.author.lattes | 6893272900174059 | |
unesp.campus | Universidade Estadual Paulista (Unesp), Instituto de Geociências e Ciências Exatas, Rio Claro | pt |
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