Petrological and Geochemical Characteristics of the Granulitic Terrain of BrejGes, Bahia, Brazil

Detalhes bibliográficos
Autor(a) principal: Barbosa, Johildo Salomão Figueirêdo
Data de Publicação: 1998
Outros Autores: Silva, Fernando Alves da, Sapucaia, Najara Santos, Iyer, Sundaram Sankara Subba
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/5140
Resumo: p. 343-356
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spelling Barbosa, Johildo Salomão FigueirêdoSilva, Fernando Alves daSapucaia, Najara SantosIyer, Sundaram Sankara SubbaBarbosa, Johildo Salomão FigueirêdoSilva, Fernando Alves daSapucaia, Najara SantosIyer, Sundaram Sankara Subba2012-01-12T16:22:18Z2012-01-12T16:22:18Z19981342-937Xhttp://www.repositorio.ufba.br/ri/handle/ri/5140v. 3, n. 4.p. 343-356New petrological and geochemical characteristics of the Brejbes region, situated in the south of Bahia, Brazil are discussed. The region forms a part of the most important and extensive granulite facies terrain in Brazil of Archean/Paleoproterozoic age. Five groups of rock types all equilibrated in the granulite facies are identified in this region. They ars: i) supracrustal and related rocks, ii) undifferentiated granulites, iii) hornblende bearing enderbite-charnockites, iv) hornblende free enderbite-charnockites, v) charnockites. The first group appears to be the oldest in the region as they form enclaves in the 2.9 Ga old undifferentiated granulites. The third and fourth group are enderbite-charnockites, whose protoliths constitute two series of calc-alkaline rocks, one titanium poor (hornblende free) and another titanium rich (hornblende bearing). U/Pb zircon SHRIMP dates indicate ages of formation at 2.8 1 Ga (hornblende free) and 2.69 Ga (hornblende bearing) for the two groups. The fifth group of rocks have charnockitic affinity and are present in the center of the BrejBes Dome. These rocks also have calcalkaline affinity, but show petrographic and geochemical characteristics distinct from those of other groups. Preliminary geochronological investigations by zircon Pb-Pb evaporation method yielded 2.6 Ga and 2.0 Ga for the charnockites from the inner core of the Brejbes Dome. These age data suggest that the circular structure was formed by the re-fusion of the 2.6 Ga old deep crustal material generating younger charnockites at 2.0 Ga.Submitted by Ana Valéria de Jesus Moura (anavaleria_131@hotmail.com) on 2012-01-12T16:22:18Z No. of bitstreams: 1 s2.0-S1342937X05708509-main.pdf: 3104524 bytes, checksum: fd009957ea5c16bbfa21a9f97b21e14f (MD5)Made available in DSpace on 2012-01-12T16:22:18Z (GMT). No. of bitstreams: 1 s2.0-S1342937X05708509-main.pdf: 3104524 bytes, checksum: fd009957ea5c16bbfa21a9f97b21e14f (MD5) Previous issue date: 1998Brejões Domegranulite facies rocksgeochemistrygeochronologyPetrological and Geochemical Characteristics of the Granulitic Terrain of BrejGes, Bahia, BrazilGondwana Researchinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAinfo:eu-repo/semantics/openAccessORIGINALs2.0-S1342937X05708509-main.pdfs2.0-S1342937X05708509-main.pdfapplication/pdf3104524https://repositorio.ufba.br/bitstream/ri/5140/1/s2.0-S1342937X05708509-main.pdffd009957ea5c16bbfa21a9f97b21e14fMD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/5140/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXTs2.0-S1342937X05708509-main.pdf.txts2.0-S1342937X05708509-main.pdf.txtExtracted texttext/plain49714https://repositorio.ufba.br/bitstream/ri/5140/3/s2.0-S1342937X05708509-main.pdf.txt8549e951f5c0cf46d4e68fcb2e2beb36MD53ri/51402022-07-05 14:03:34.454oai: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 Petrological and Geochemical Characteristics of the Granulitic Terrain of BrejGes, Bahia, Brazil
dc.title.alternative.pt_BR.fl_str_mv Gondwana Research
title Petrological and Geochemical Characteristics of the Granulitic Terrain of BrejGes, Bahia, Brazil
spellingShingle Petrological and Geochemical Characteristics of the Granulitic Terrain of BrejGes, Bahia, Brazil
Barbosa, Johildo Salomão Figueirêdo
Brejões Dome
granulite facies rocks
geochemistry
geochronology
title_short Petrological and Geochemical Characteristics of the Granulitic Terrain of BrejGes, Bahia, Brazil
title_full Petrological and Geochemical Characteristics of the Granulitic Terrain of BrejGes, Bahia, Brazil
title_fullStr Petrological and Geochemical Characteristics of the Granulitic Terrain of BrejGes, Bahia, Brazil
title_full_unstemmed Petrological and Geochemical Characteristics of the Granulitic Terrain of BrejGes, Bahia, Brazil
title_sort Petrological and Geochemical Characteristics of the Granulitic Terrain of BrejGes, Bahia, Brazil
author Barbosa, Johildo Salomão Figueirêdo
author_facet Barbosa, Johildo Salomão Figueirêdo
Silva, Fernando Alves da
Sapucaia, Najara Santos
Iyer, Sundaram Sankara Subba
author_role author
author2 Silva, Fernando Alves da
Sapucaia, Najara Santos
Iyer, Sundaram Sankara Subba
author2_role author
author
author
dc.contributor.author.fl_str_mv Barbosa, Johildo Salomão Figueirêdo
Silva, Fernando Alves da
Sapucaia, Najara Santos
Iyer, Sundaram Sankara Subba
Barbosa, Johildo Salomão Figueirêdo
Silva, Fernando Alves da
Sapucaia, Najara Santos
Iyer, Sundaram Sankara Subba
dc.subject.por.fl_str_mv Brejões Dome
granulite facies rocks
geochemistry
geochronology
topic Brejões Dome
granulite facies rocks
geochemistry
geochronology
description p. 343-356
publishDate 1998
dc.date.issued.fl_str_mv 1998
dc.date.accessioned.fl_str_mv 2012-01-12T16:22:18Z
dc.date.available.fl_str_mv 2012-01-12T16:22:18Z
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/5140
dc.identifier.issn.none.fl_str_mv 1342-937X
dc.identifier.number.pt_BR.fl_str_mv v. 3, n. 4.
identifier_str_mv 1342-937X
v. 3, n. 4.
url http://www.repositorio.ufba.br/ri/handle/ri/5140
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.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
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