A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental

Detalhes bibliográficos
Autor(a) principal: CAXITO, Fabrício de Andrade
Data de Publicação: 2008
Outros Autores: SANTOS, Yan Lucas de O. Pereira dos, UHLEIN, Alexandre, PEDREIRA, Augusto José, FAULSTICH, Fabiano Richard L.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional de Geociências - RIGEO
Texto Completo: https://rigeo.cprm.gov.br/handle/doc/563
Resumo: The Espinhaço Supergroup cropping out between the cities of Macaúbas and Canatiba, in the northern|Espinhaço range, Bahia, is composed by the Pajeú Group (metarhythmites and intermediate to acid|metavolcanics), the Bom Retiro Formation (mature quartzites with metric to decametric cross-bedding), the São Marcos Group (quartzites with wavy stratification and wave-related cross-bedding, intercalated with micaschists) and the Sítio Novo Group (cross-bedded, conglomeratic and massive quartzites, metarhythmites and metapelites). The bedrock (gneisses and schists) is tectonically emplaced over the Espinhaço Supergroup in the eastern portion of the area, and the Espinhaço Supergroup is unconformably covered by the Santo Onofre Group (graphite-phyllites and metarhythmites) in the western portion of the area. This whole stratigraphic package is inverted, allowing, together with relations between bedding and schistosity, to define a large inverted limb of an assymmetric fold with axis NNW-SSE. In the Veredas Formation, intermediate portion of the Sítio Novo Group, occurs a bed of approximately 10m of deep blue dumortierite-quartzites, used as ornamental rocks. Samples of these rocks have been analysed using optic, cathodoluminescence and electronic microscopic techniques, revealing its mineralogic|and micromorphologic features. Comparing the stratigraphic and sedimentologic features of the studied area with other outcropping areas of the Espinhaço Supergroup, it can be concluded that it has evolved through three sedimentary megacycles,|represented on each of the portions of the Espinhaço Range and Diamantina Plateau in the eastern region|of Brazil. The first megacycle involves syn-rift sedimentation, starting at about 1,75 Ga (Statherian Period). The second megacycle involves fundamentally eolian sedimentation. The third megacycle involves mainly shallow marine to transitional sedimentation, with important tectonic reativation in the northern sector of the basin. All megacycles evolded in intracratonic environment
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spelling CAXITO, Fabrício de AndradeSANTOS, Yan Lucas de O. Pereira dosUHLEIN, AlexandrePEDREIRA, Augusto JoséFAULSTICH, Fabiano Richard L.2013-12-19T16:32:41Z2013-12-19T16:32:41Z2008CAXITO, Fabrício de Andrade; SANTOS, Yan Lucas de O. Pereira dos; UHLEIN, Alexandre; PEDREIRA, Augusto José; FAULSTICH, Fabiano Richard L. A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental. Geonomos, Belo Horizonte, v.16, n.1, p.11-20, Belo Horizonte.01044486https://rigeo.cprm.gov.br/handle/doc/563The Espinhaço Supergroup cropping out between the cities of Macaúbas and Canatiba, in the northern|Espinhaço range, Bahia, is composed by the Pajeú Group (metarhythmites and intermediate to acid|metavolcanics), the Bom Retiro Formation (mature quartzites with metric to decametric cross-bedding), the São Marcos Group (quartzites with wavy stratification and wave-related cross-bedding, intercalated with micaschists) and the Sítio Novo Group (cross-bedded, conglomeratic and massive quartzites, metarhythmites and metapelites). The bedrock (gneisses and schists) is tectonically emplaced over the Espinhaço Supergroup in the eastern portion of the area, and the Espinhaço Supergroup is unconformably covered by the Santo Onofre Group (graphite-phyllites and metarhythmites) in the western portion of the area. This whole stratigraphic package is inverted, allowing, together with relations between bedding and schistosity, to define a large inverted limb of an assymmetric fold with axis NNW-SSE. In the Veredas Formation, intermediate portion of the Sítio Novo Group, occurs a bed of approximately 10m of deep blue dumortierite-quartzites, used as ornamental rocks. Samples of these rocks have been analysed using optic, cathodoluminescence and electronic microscopic techniques, revealing its mineralogic|and micromorphologic features. Comparing the stratigraphic and sedimentologic features of the studied area with other outcropping areas of the Espinhaço Supergroup, it can be concluded that it has evolved through three sedimentary megacycles,|represented on each of the portions of the Espinhaço Range and Diamantina Plateau in the eastern region|of Brazil. The first megacycle involves syn-rift sedimentation, starting at about 1,75 Ga (Statherian Period). The second megacycle involves fundamentally eolian sedimentation. The third megacycle involves mainly shallow marine to transitional sedimentation, with important tectonic reativation in the northern sector of the basin. All megacycles evolded in intracratonic environmentGEOLOGIA REGIONALESTRATIGRAFIAQUADRILÁTERO FERRÍFEROSERRA DO ESPINHAÇOBRASILMINAS GERAISA Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Orientalinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleBelo Horizonteporreponame:Repositório Institucional de Geociências - RIGEOinstname:Companhia de Pesquisa de Recursos Minerais (CPRM)instacron:CPRMinfo:eu-repo/semantics/openAccessTEXTart_caxito_espinha.pdf.txtart_caxito_espinha.pdf.txtExtracted texttext/plain35201http://rigeo.cprm.gov.br/jspui/bitstream/doc/563/2/art_caxito_espinha.pdf.txt1cc9787faa57a06775ebf463c99ba0daMD52THUMBNAILart_caxito_espinha.pdf.jpgart_caxito_espinha.pdf.jpgGenerated Thumbnailimage/jpeg1573http://rigeo.cprm.gov.br/jspui/bitstream/doc/563/3/art_caxito_espinha.pdf.jpgb4612ae6b203df0f701bc374b66012d0MD53ORIGINALart_caxito_espinha.pdfart_caxito_espinha.pdfproducao cientificaapplication/pdf7041665http://rigeo.cprm.gov.br/jspui/bitstream/doc/563/1/art_caxito_espinha.pdf71111c232492f2fa3646f665eb7c62eeMD51doc/5632023-02-13 11:10:44.33oai:rigeo.sgb.gov.br:doc/563Repositório InstitucionalONGhttps://rigeo.sgb.gov.br/oai/request https://rigeo.cprm.gov.br/oai/requestrigeo@sgb.gov.bropendoar:2023-02-13T14:10:44Repositório Institucional de Geociências - RIGEO - Companhia de Pesquisa de Recursos Minerais (CPRM)false
dc.title.none.fl_str_mv A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental
title A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental
spellingShingle A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental
CAXITO, Fabrício de Andrade
GEOLOGIA REGIONAL
ESTRATIGRAFIA
QUADRILÁTERO FERRÍFERO
SERRA DO ESPINHAÇO
BRASIL
MINAS GERAIS
title_short A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental
title_full A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental
title_fullStr A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental
title_full_unstemmed A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental
title_sort A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental
author CAXITO, Fabrício de Andrade
author_facet CAXITO, Fabrício de Andrade
SANTOS, Yan Lucas de O. Pereira dos
UHLEIN, Alexandre
PEDREIRA, Augusto José
FAULSTICH, Fabiano Richard L.
author_role author
author2 SANTOS, Yan Lucas de O. Pereira dos
UHLEIN, Alexandre
PEDREIRA, Augusto José
FAULSTICH, Fabiano Richard L.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv CAXITO, Fabrício de Andrade
SANTOS, Yan Lucas de O. Pereira dos
UHLEIN, Alexandre
PEDREIRA, Augusto José
FAULSTICH, Fabiano Richard L.
dc.subject.por.fl_str_mv GEOLOGIA REGIONAL
ESTRATIGRAFIA
QUADRILÁTERO FERRÍFERO
SERRA DO ESPINHAÇO
BRASIL
MINAS GERAIS
topic GEOLOGIA REGIONAL
ESTRATIGRAFIA
QUADRILÁTERO FERRÍFERO
SERRA DO ESPINHAÇO
BRASIL
MINAS GERAIS
description The Espinhaço Supergroup cropping out between the cities of Macaúbas and Canatiba, in the northern|Espinhaço range, Bahia, is composed by the Pajeú Group (metarhythmites and intermediate to acid|metavolcanics), the Bom Retiro Formation (mature quartzites with metric to decametric cross-bedding), the São Marcos Group (quartzites with wavy stratification and wave-related cross-bedding, intercalated with micaschists) and the Sítio Novo Group (cross-bedded, conglomeratic and massive quartzites, metarhythmites and metapelites). The bedrock (gneisses and schists) is tectonically emplaced over the Espinhaço Supergroup in the eastern portion of the area, and the Espinhaço Supergroup is unconformably covered by the Santo Onofre Group (graphite-phyllites and metarhythmites) in the western portion of the area. This whole stratigraphic package is inverted, allowing, together with relations between bedding and schistosity, to define a large inverted limb of an assymmetric fold with axis NNW-SSE. In the Veredas Formation, intermediate portion of the Sítio Novo Group, occurs a bed of approximately 10m of deep blue dumortierite-quartzites, used as ornamental rocks. Samples of these rocks have been analysed using optic, cathodoluminescence and electronic microscopic techniques, revealing its mineralogic|and micromorphologic features. Comparing the stratigraphic and sedimentologic features of the studied area with other outcropping areas of the Espinhaço Supergroup, it can be concluded that it has evolved through three sedimentary megacycles,|represented on each of the portions of the Espinhaço Range and Diamantina Plateau in the eastern region|of Brazil. The first megacycle involves syn-rift sedimentation, starting at about 1,75 Ga (Statherian Period). The second megacycle involves fundamentally eolian sedimentation. The third megacycle involves mainly shallow marine to transitional sedimentation, with important tectonic reativation in the northern sector of the basin. All megacycles evolded in intracratonic environment
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2013-12-19T16:32:41Z
dc.date.available.fl_str_mv 2013-12-19T16:32:41Z
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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dc.identifier.citation.fl_str_mv CAXITO, Fabrício de Andrade; SANTOS, Yan Lucas de O. Pereira dos; UHLEIN, Alexandre; PEDREIRA, Augusto José; FAULSTICH, Fabiano Richard L. A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental. Geonomos, Belo Horizonte, v.16, n.1, p.11-20, Belo Horizonte.
dc.identifier.uri.fl_str_mv https://rigeo.cprm.gov.br/handle/doc/563
dc.identifier.issn.none.fl_str_mv 01044486
identifier_str_mv CAXITO, Fabrício de Andrade; SANTOS, Yan Lucas de O. Pereira dos; UHLEIN, Alexandre; PEDREIRA, Augusto José; FAULSTICH, Fabiano Richard L. A Geologia entre Macaúbas e Canatiba (Bahia) e a evolução do Supergrupo Espinhaço no Brasil Oriental. Geonomos, Belo Horizonte, v.16, n.1, p.11-20, Belo Horizonte.
01044486
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