Geological features and the Paleoproterozoic collision of four Archean crustal segments of the São Francisco Craton, Bahia, Brazil. A synthesis

Detalhes bibliográficos
Autor(a) principal: Barbosa, Johildo Salomão Figueirêdo
Data de Publicação: 2002
Outros Autores: Sabaté, Pierre
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6513
Resumo: p.343-359
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spelling Barbosa, Johildo Salomão FigueirêdoSabaté, PierreBarbosa, Johildo Salomão FigueirêdoSabaté, Pierre2012-07-31T17:31:23Z2012-07-31T17:31:23Z20020001-3765http://www.repositorio.ufba.br/ri/handle/ri/6513v. 74, n. 2p.343-359Recent geological, geochronological and isotopic research has identified four important Archean crustal segments in the basement of the São Francisco Craton in the State of Bahia. The oldest Gavião Block occurs in the WSW part, composed essentially of granitic, granodioritic and migmatitic rocks. It includes remnants of TTG suites, considered to represent the oldest rocks in the South American continent (~ 3,4Ga) and associated Archean greenstone belt sequences. The youngest segment, termed the Itabuna-Salvador-Curaçá Belt is exposed along the Atlantic Coast, from the SE part of Bahia up to Salvador and then along a NE trend. It is mainly composed of tonalite/trondhjemites, but also includes stripes of intercalated metasediments and ocean-floor/back-arc gabbros and basalts. The Jequié Block, the third segment, is exposed in the SE-SSW area, being characterized by Archean granulitic migmatites with supracrustal inclusions and several charnockitic intrusions. The Serrinha Block (fourth segment) occurs to the NE, composed of orthogneisses and migmatites, which represent the basement of Paleoproterozoic greenstone belts sequences. During the Paleoproterozoic Transamazonian Orogeny, these four crustal segments collided, resulting in the formation of an important mountain belt. Geochronological constrains indicate that the regional metamorphism resulting from crustal thickening associated with the collision process took place around 2.0 Ga.Submitted by Texeira Ana (atanateixeira@gmail.com) on 2012-07-31T17:31:23Z No. of bitstreams: 1 BARBOSA, JOHILDO S.F..pdf: 548941 bytes, checksum: 43cb9bec6638726d72cba8948d0bc2ed (MD5)Made available in DSpace on 2012-07-31T17:31:23Z (GMT). No. of bitstreams: 1 BARBOSA, JOHILDO S.F..pdf: 548941 bytes, checksum: 43cb9bec6638726d72cba8948d0bc2ed (MD5) Previous issue date: 2002-06Rio de JaneiroAcademia Brasileira de Ciênciashttp://dx.doi.org/10.1590/S0001-37652002000200009reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAGeologicalGeochronological and isotopic researchArchean segmentsPaleoproterozoic collisionGeological features and the Paleoproterozoic collision of four Archean crustal segments of the São Francisco Craton, Bahia, Brazil. 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dc.title.pt_BR.fl_str_mv Geological features and the Paleoproterozoic collision of four Archean crustal segments of the São Francisco Craton, Bahia, Brazil. A synthesis
dc.title.alternative.pt_BR.fl_str_mv Anais da Academia Brasileira de Ciências
title Geological features and the Paleoproterozoic collision of four Archean crustal segments of the São Francisco Craton, Bahia, Brazil. A synthesis
spellingShingle Geological features and the Paleoproterozoic collision of four Archean crustal segments of the São Francisco Craton, Bahia, Brazil. A synthesis
Barbosa, Johildo Salomão Figueirêdo
Geological
Geochronological and isotopic research
Archean segments
Paleoproterozoic collision
title_short Geological features and the Paleoproterozoic collision of four Archean crustal segments of the São Francisco Craton, Bahia, Brazil. A synthesis
title_full Geological features and the Paleoproterozoic collision of four Archean crustal segments of the São Francisco Craton, Bahia, Brazil. A synthesis
title_fullStr Geological features and the Paleoproterozoic collision of four Archean crustal segments of the São Francisco Craton, Bahia, Brazil. A synthesis
title_full_unstemmed Geological features and the Paleoproterozoic collision of four Archean crustal segments of the São Francisco Craton, Bahia, Brazil. A synthesis
title_sort Geological features and the Paleoproterozoic collision of four Archean crustal segments of the São Francisco Craton, Bahia, Brazil. A synthesis
author Barbosa, Johildo Salomão Figueirêdo
author_facet Barbosa, Johildo Salomão Figueirêdo
Sabaté, Pierre
author_role author
author2 Sabaté, Pierre
author2_role author
dc.contributor.author.fl_str_mv Barbosa, Johildo Salomão Figueirêdo
Sabaté, Pierre
Barbosa, Johildo Salomão Figueirêdo
Sabaté, Pierre
dc.subject.por.fl_str_mv Geological
Geochronological and isotopic research
Archean segments
Paleoproterozoic collision
topic Geological
Geochronological and isotopic research
Archean segments
Paleoproterozoic collision
description p.343-359
publishDate 2002
dc.date.issued.fl_str_mv 2002
dc.date.accessioned.fl_str_mv 2012-07-31T17:31:23Z
dc.date.available.fl_str_mv 2012-07-31T17:31:23Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/6513
dc.identifier.issn.none.fl_str_mv 0001-3765
dc.identifier.number.pt_BR.fl_str_mv v. 74, n. 2
identifier_str_mv 0001-3765
v. 74, n. 2
url http://www.repositorio.ufba.br/ri/handle/ri/6513
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Academia Brasileira de Ciências
publisher.none.fl_str_mv Academia Brasileira de Ciências
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1590/S0001-37652002000200009
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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