Hercynite–quartz-bearing granulites from Brejões Dome area, Jequié Block, Bahia, Brazil: Influence of charnockite intrusion on granulite facies metamorphism

Detalhes bibliográficos
Autor(a) principal: Barbosa, Johildo Salomão Figueirêdo
Data de Publicação: 2006
Outros Autores: Nicollet, Christian, Leite, Carlson, Kienast, Jean-Robert, Fuck, Reinhardt A., Macedo, Eron Pires
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6342
Resumo: RESTRITO
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spelling Barbosa, Johildo Salomão FigueirêdoNicollet, ChristianLeite, CarlsonKienast, Jean-RobertFuck, Reinhardt A.Macedo, Eron PiresBarbosa, Johildo Salomão FigueirêdoNicollet, ChristianLeite, CarlsonKienast, Jean-RobertFuck, Reinhardt A.Macedo, Eron Pires2012-07-05T15:20:10Z2012-07-05T15:20:10Z20060024-4937http://www.repositorio.ufba.br/ri/handle/ri/6342v.92,n.3-4RESTRITOIn the present study, we describe and discuss the geology of aluminous–magnesian granulites and associated garnet-bearing charnockitic granulite from the Brejões Dome area, located in the Jequié Block, part of the São Francisco Craton in Bahia, Brazil. Investigation of metamorphic mineral assemblages allows the evaluation of P–T conditions for the formation of these rocks, and therefore to obtain constraints for the better understanding of the geological evolution of the area. We conclude that the rocks from the Brejões Dome area were formed under granulite facies conditions of low to intermediate pressure (5–8 kbar). Temperatures determined in samples of aluminous–magnesian granulites collected away from the dome are in the order of 850 °C, similar to those determined elsewhere in the southern part of the Itabuna–Salvador–Curaçá Orogen. However, samples of the same rock type collected close to the Brejões Dome are hercynite + quartz-bearing and record higher temperatures of about 900–1000 °C. It is suggested that the intrusion of the Brejões charnockite diapir was responsible for a local increase in temperature above the peak temperature of regional granulite metamorphism.Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2012-07-05T15:20:09Z No. of bitstreams: 1 AA.pdf: 1938341 bytes, checksum: 9a324acc2f3edcbd630ce7c7d370fc14 (MD5)Made available in DSpace on 2012-07-05T15:20:10Z (GMT). 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dc.title.pt_BR.fl_str_mv Hercynite–quartz-bearing granulites from Brejões Dome area, Jequié Block, Bahia, Brazil: Influence of charnockite intrusion on granulite facies metamorphism
dc.title.alternative.pt_BR.fl_str_mv Lithos
title Hercynite–quartz-bearing granulites from Brejões Dome area, Jequié Block, Bahia, Brazil: Influence of charnockite intrusion on granulite facies metamorphism
spellingShingle Hercynite–quartz-bearing granulites from Brejões Dome area, Jequié Block, Bahia, Brazil: Influence of charnockite intrusion on granulite facies metamorphism
Barbosa, Johildo Salomão Figueirêdo
Granulite
Jequié Block
Paleoproterozoic
São Francisco Craton
Spinel + quartz
Ultrahigh-temperature
title_short Hercynite–quartz-bearing granulites from Brejões Dome area, Jequié Block, Bahia, Brazil: Influence of charnockite intrusion on granulite facies metamorphism
title_full Hercynite–quartz-bearing granulites from Brejões Dome area, Jequié Block, Bahia, Brazil: Influence of charnockite intrusion on granulite facies metamorphism
title_fullStr Hercynite–quartz-bearing granulites from Brejões Dome area, Jequié Block, Bahia, Brazil: Influence of charnockite intrusion on granulite facies metamorphism
title_full_unstemmed Hercynite–quartz-bearing granulites from Brejões Dome area, Jequié Block, Bahia, Brazil: Influence of charnockite intrusion on granulite facies metamorphism
title_sort Hercynite–quartz-bearing granulites from Brejões Dome area, Jequié Block, Bahia, Brazil: Influence of charnockite intrusion on granulite facies metamorphism
author Barbosa, Johildo Salomão Figueirêdo
author_facet Barbosa, Johildo Salomão Figueirêdo
Nicollet, Christian
Leite, Carlson
Kienast, Jean-Robert
Fuck, Reinhardt A.
Macedo, Eron Pires
author_role author
author2 Nicollet, Christian
Leite, Carlson
Kienast, Jean-Robert
Fuck, Reinhardt A.
Macedo, Eron Pires
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Barbosa, Johildo Salomão Figueirêdo
Nicollet, Christian
Leite, Carlson
Kienast, Jean-Robert
Fuck, Reinhardt A.
Macedo, Eron Pires
Barbosa, Johildo Salomão Figueirêdo
Nicollet, Christian
Leite, Carlson
Kienast, Jean-Robert
Fuck, Reinhardt A.
Macedo, Eron Pires
dc.subject.por.fl_str_mv Granulite
Jequié Block
Paleoproterozoic
São Francisco Craton
Spinel + quartz
Ultrahigh-temperature
topic Granulite
Jequié Block
Paleoproterozoic
São Francisco Craton
Spinel + quartz
Ultrahigh-temperature
description RESTRITO
publishDate 2006
dc.date.issued.fl_str_mv 2006
dc.date.accessioned.fl_str_mv 2012-07-05T15:20:10Z
dc.date.available.fl_str_mv 2012-07-05T15:20:10Z
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/6342
dc.identifier.issn.none.fl_str_mv 0024-4937
dc.identifier.number.pt_BR.fl_str_mv v.92,n.3-4
identifier_str_mv 0024-4937
v.92,n.3-4
url http://www.repositorio.ufba.br/ri/handle/ri/6342
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 Lithos
publisher.none.fl_str_mv Lithos
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/j.lithos.2006.03.064
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
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