SHRIMP U–Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, Brazil

Detalhes bibliográficos
Autor(a) principal: Leal, Luiz R. Bastos
Data de Publicação: 2003
Outros Autores: C. Cunha, José, Cordani, Umberto G., Teixeira, Wilson, Nutman, Allen P., Leal, Angela B. Menezes, Macambira, Moacir José Buenano
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/7372
Resumo: Texto completo: acesso restrito. p. 775-785
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spelling Leal, Luiz R. BastosC. Cunha, JoséCordani, Umberto G.Teixeira, WilsonNutman, Allen P.Leal, Angela B. MenezesMacambira, Moacir José BuenanoLeal, Luiz R. BastosC. Cunha, JoséCordani, Umberto G.Teixeira, WilsonNutman, Allen P.Leal, Angela B. MenezesMacambira, Moacir José Buenano2012-12-10T16:17:02Z20030895-9811http://www.repositorio.ufba.br/ri/handle/ri/7372v. 15, n. 7Texto completo: acesso restrito. p. 775-785The Gavião block in the northern portion of the São Francisco craton, northeast Brazil, is one of the oldest Archean fragments of the South American platform. It underwent polycyclic evolution from very old juvenile components dated between 3400 and 3000 Ma. The studied parts of the Umburanas greenstone belt (UGB) formed over ‘stable’ continental crust. SHRIMP U/Pb isotopic analyses of detrital zircons from conglomeratic quartzites of the UGB's lower unit yield dates between 3335 and 3040 Ma. These dates indicate provenance from crustal materials of different ages and a maximum age of deposition as young as 3040±24 Ma (single zircon analysis) but certainly after 3147±16 Ma (three analyses). 207Pb/206Pb zircon evaporation analyses from a meta-andesite of the intermediate unit of the UGB yield 2744±15 Ma, which is interpreted as the time of magmatic crystallization. The Sm/Nd whole-rock systematics of three metakomatiites from the base of the lower unit indicate that they are isotopically disturbed. Additional Sm/Nd analyses of one metabasalt (lower unit) and two meta-andesites (intermediate unit) were compared with those of the country rocks. Their similarity suggests that crustal contamination processes play an important role in the formation of volcanic rocks. As a whole, the isotopic picture is in agreement with an ensialic tectonic setting of the studied parts of the UGB.Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2012-12-10T16:17:02Z No. of bitstreams: 1 1-s2.0-S0895981102001293-main.pdf: 470146 bytes, checksum: 27f6bc0665ccec0fdb17aca9157ff51f (MD5)Made available in DSpace on 2012-12-10T16:17:02Z (GMT). No. of bitstreams: 1 1-s2.0-S0895981102001293-main.pdf: 470146 bytes, checksum: 27f6bc0665ccec0fdb17aca9157ff51f (MD5) Previous issue date: 2003http://dx.doi.org/10.1016/S0895-9811(02)00129-3reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAArchaean-PaleoproterozoicNd isotopic signatureSão Francisco cratonSHRIMP U–Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, BrazilJournal of South American Earth Sciencesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01enginfo:eu-repo/semantics/openAccessORIGINAL1-s2.0-S0895981102001293-main.pdf1-s2.0-S0895981102001293-main.pdfapplication/pdf470146https://repositorio.ufba.br/bitstream/ri/7372/1/1-s2.0-S0895981102001293-main.pdf27f6bc0665ccec0fdb17aca9157ff51fMD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/7372/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXT1-s2.0-S0895981102001293-main.pdf.txt1-s2.0-S0895981102001293-main.pdf.txtExtracted texttext/plain47421https://repositorio.ufba.br/bitstream/ri/7372/3/1-s2.0-S0895981102001293-main.pdf.txtad86b9ecdaae5cf980bbe118176aceb6MD53ri/73722022-07-05 14:03:34.284oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:34Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv SHRIMP U–Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, Brazil
dc.title.alternative.pt_BR.fl_str_mv Journal of South American Earth Sciences
title SHRIMP U–Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, Brazil
spellingShingle SHRIMP U–Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, Brazil
Leal, Luiz R. Bastos
Archaean-Paleoproterozoic
Nd isotopic signature
São Francisco craton
title_short SHRIMP U–Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, Brazil
title_full SHRIMP U–Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, Brazil
title_fullStr SHRIMP U–Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, Brazil
title_full_unstemmed SHRIMP U–Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, Brazil
title_sort SHRIMP U–Pb, 207Pb/206Pb zircon dating, and Nd isotopic signature of the Umburanas greenstone belt, northern São Francisco craton, Brazil
author Leal, Luiz R. Bastos
author_facet Leal, Luiz R. Bastos
C. Cunha, José
Cordani, Umberto G.
Teixeira, Wilson
Nutman, Allen P.
Leal, Angela B. Menezes
Macambira, Moacir José Buenano
author_role author
author2 C. Cunha, José
Cordani, Umberto G.
Teixeira, Wilson
Nutman, Allen P.
Leal, Angela B. Menezes
Macambira, Moacir José Buenano
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Leal, Luiz R. Bastos
C. Cunha, José
Cordani, Umberto G.
Teixeira, Wilson
Nutman, Allen P.
Leal, Angela B. Menezes
Macambira, Moacir José Buenano
Leal, Luiz R. Bastos
C. Cunha, José
Cordani, Umberto G.
Teixeira, Wilson
Nutman, Allen P.
Leal, Angela B. Menezes
Macambira, Moacir José Buenano
dc.subject.por.fl_str_mv Archaean-Paleoproterozoic
Nd isotopic signature
São Francisco craton
topic Archaean-Paleoproterozoic
Nd isotopic signature
São Francisco craton
description Texto completo: acesso restrito. p. 775-785
publishDate 2003
dc.date.issued.fl_str_mv 2003
dc.date.accessioned.fl_str_mv 2012-12-10T16:17:02Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/7372
dc.identifier.issn.none.fl_str_mv 0895-9811
dc.identifier.number.pt_BR.fl_str_mv v. 15, n. 7
identifier_str_mv 0895-9811
v. 15, n. 7
url http://www.repositorio.ufba.br/ri/handle/ri/7372
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/S0895-9811(02)00129-3
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