Magmatismo do batólito rapakivi Rio Branco, sw do Cráton Amazônico (MT)

Detalhes bibliográficos
Autor(a) principal: de Araújo, Larissa Marques Barbosa
Data de Publicação: 2011
Outros Autores: Godoy, Antonio Misson [UNESP]
Tipo de documento: Artigo
Idioma: eng
por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://www.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/5535
http://hdl.handle.net/11449/73047
Resumo: Rio Branco Rapakivi Batholith is located on the southwestern portion of the Amazonian Craton in Mato Grosso and belongs to the Cachoeirinha Tectonic Domain, part of the Rio Negro-Juruena Geochronological Province, Central Brasil. The batholith is constituted by microgabbros to quartz microgabbros and microdiorites to quartz microdiorites, middle to fine-grained equigranular to porphyritic varieties form the Rio Branco Intrusive Basic Suite, showing a discontinuous distribution and located near the margins of the intrusion.Majorly constituted by porphyritic, granophyric and isotropic facies of Rio Branco Intrusive Acid Suit which is composed by older dark red rapakivi monzogranites to quartz monzonites and quartz sienites (1403±0.6 Ma) and the younger red rapakivi leuco-monzogranites (1382±49 Ma) and late equigranular to pegmatitic monzogranites. The magmatism is constituted by two distinct magmas related to the end of the collisional event of Cachoeirinha Orogeny, one with alkaline basalts generated in an intraplate environment and the other postorogenic to anorogenic with peraluminous to metaluminous compositions and define a high-K calc-alkaline to shoshonitic magmatism in transition among the I- and A-types. The contacts are marked by extensive mafic sills and dikes of alkaline basalts derived from intraplate environment of the Salto do Céu Intrusive Basic Suite (±808 Ma) associate to the Sunsás-Aguapei Orogenic Belt and metasedimentary rocks of the Aguapeí Grup.
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spelling Magmatismo do batólito rapakivi Rio Branco, sw do Cráton Amazônico (MT)Rio Branco rapakivi batholith magmatism, Southwestern of Amazonian Craton - MTAmazonian CratonGeochronologyRio Branco Batolith Rapakivialkalinitybasaltbatholithgeochronologyisotopic analysismagmatismmonzonitequartzBrazilMato GrossoRio Branco Rapakivi Batholith is located on the southwestern portion of the Amazonian Craton in Mato Grosso and belongs to the Cachoeirinha Tectonic Domain, part of the Rio Negro-Juruena Geochronological Province, Central Brasil. The batholith is constituted by microgabbros to quartz microgabbros and microdiorites to quartz microdiorites, middle to fine-grained equigranular to porphyritic varieties form the Rio Branco Intrusive Basic Suite, showing a discontinuous distribution and located near the margins of the intrusion.Majorly constituted by porphyritic, granophyric and isotropic facies of Rio Branco Intrusive Acid Suit which is composed by older dark red rapakivi monzogranites to quartz monzonites and quartz sienites (1403±0.6 Ma) and the younger red rapakivi leuco-monzogranites (1382±49 Ma) and late equigranular to pegmatitic monzogranites. The magmatism is constituted by two distinct magmas related to the end of the collisional event of Cachoeirinha Orogeny, one with alkaline basalts generated in an intraplate environment and the other postorogenic to anorogenic with peraluminous to metaluminous compositions and define a high-K calc-alkaline to shoshonitic magmatism in transition among the I- and A-types. The contacts are marked by extensive mafic sills and dikes of alkaline basalts derived from intraplate environment of the Salto do Céu Intrusive Basic Suite (±808 Ma) associate to the Sunsás-Aguapei Orogenic Belt and metasedimentary rocks of the Aguapeí Grup.O Batólito Rapakivi Rio Branco ocorre na porção sudoeste do Cráton Amazônico no estado do Mato Grosso, inserido no Domínio Tectônico Cachoeirinha, parte da Província Geocronológica Rio Negro-Juruena. O batólito é constituído por microgabros a quartzo micrograbros e microdioritos a quartzo microdioritos equigranulares finos a médios a porfiríticos da Suíte Básica Intrusiva Rio Branco, com uma distribuição descontínua e localizada nas bordas da intrusão ácida. Dominantemente ocorrem as fácies porfiríticas, granofíricas e isotrópicas da Suíte Ácida Intrusiva Rio Branco composta, a mais antiga por monzogranitos a quartzo monzonitos e quartzo sienitos vermelhos escuros rapakivi (1403±0.6 Ma) e a mais jovem e principal, por leuco-monzogranitos vermelhos rapakivis (1382±49 Ma), além das fácies tardias de monzogranitos equi-inequigranulares a pegmatóides. O magmatismo é definido dois magmas distintos relacionados ao evento colisional da Orogenia Cachoeirinha, um formado por basaltos alcalinos de ambiente intraplaca e o outro, por granitos peraluminoso a metaluminoso cálcio-alcalino de alto potássio a shoshonítico, de transição entre os tipos I e A, pós-orogênico a anorogênico. Os contatos externos ocorrem com extensas soleiras e diques de basaltos alcalinos formado em ambiente intraplaca da Suíte Básica Intrusiva Salto do Céu de (±808 Ma) associados à Orogenia Sunsás-Aguapeí ou com as rochas metassedimentares do Grupo Aguapeí. Palavras-chave: Cráton Amazônico, Batólito Rapakivi Rio Branco, geocronologia.Instituto de Ciências Ambientais e Desenvolvimento Sustentável Universidade Federal da Bahia Campus Universitário Reitor Edgard Santos, Rua Prof. José Seabra, s/n, CEP 47805-100. Barreiras, BADepartamento de Petrologia e Metalogenia Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista, Campus de Rio Claro. Avenida 24-A, 1515 - Bela Vista, CEP. 13506-900. Rio Claro, SPDepartamento de Petrologia e Metalogenia Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista, Campus de Rio Claro. Avenida 24-A, 1515 - Bela Vista, CEP. 13506-900. Rio Claro, SPUniversidade Federal da Bahia (UFBA)Universidade Estadual Paulista (Unesp)de Araújo, Larissa Marques BarbosaGodoy, Antonio Misson [UNESP]2014-05-27T11:26:19Z2014-05-27T11:26:19Z2011-12-06info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article173-195application/pdfhttp://www.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/5535Geociencias, v. 30, n. 2, p. 173-195, 2011.0101-90821980-900Xhttp://hdl.handle.net/11449/730472-s2.0-825551731012-s2.0-82555173101.pdf4020121129398235Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengporGeociências0,230info:eu-repo/semantics/openAccess2023-10-01T06:01:07Zoai:repositorio.unesp.br:11449/73047Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T13:38:04.449260Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Magmatismo do batólito rapakivi Rio Branco, sw do Cráton Amazônico (MT)
Rio Branco rapakivi batholith magmatism, Southwestern of Amazonian Craton - MT
title Magmatismo do batólito rapakivi Rio Branco, sw do Cráton Amazônico (MT)
spellingShingle Magmatismo do batólito rapakivi Rio Branco, sw do Cráton Amazônico (MT)
de Araújo, Larissa Marques Barbosa
Amazonian Craton
Geochronology
Rio Branco Batolith Rapakivi
alkalinity
basalt
batholith
geochronology
isotopic analysis
magmatism
monzonite
quartz
Brazil
Mato Grosso
title_short Magmatismo do batólito rapakivi Rio Branco, sw do Cráton Amazônico (MT)
title_full Magmatismo do batólito rapakivi Rio Branco, sw do Cráton Amazônico (MT)
title_fullStr Magmatismo do batólito rapakivi Rio Branco, sw do Cráton Amazônico (MT)
title_full_unstemmed Magmatismo do batólito rapakivi Rio Branco, sw do Cráton Amazônico (MT)
title_sort Magmatismo do batólito rapakivi Rio Branco, sw do Cráton Amazônico (MT)
author de Araújo, Larissa Marques Barbosa
author_facet de Araújo, Larissa Marques Barbosa
Godoy, Antonio Misson [UNESP]
author_role author
author2 Godoy, Antonio Misson [UNESP]
author2_role author
dc.contributor.none.fl_str_mv Universidade Federal da Bahia (UFBA)
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv de Araújo, Larissa Marques Barbosa
Godoy, Antonio Misson [UNESP]
dc.subject.por.fl_str_mv Amazonian Craton
Geochronology
Rio Branco Batolith Rapakivi
alkalinity
basalt
batholith
geochronology
isotopic analysis
magmatism
monzonite
quartz
Brazil
Mato Grosso
topic Amazonian Craton
Geochronology
Rio Branco Batolith Rapakivi
alkalinity
basalt
batholith
geochronology
isotopic analysis
magmatism
monzonite
quartz
Brazil
Mato Grosso
description Rio Branco Rapakivi Batholith is located on the southwestern portion of the Amazonian Craton in Mato Grosso and belongs to the Cachoeirinha Tectonic Domain, part of the Rio Negro-Juruena Geochronological Province, Central Brasil. The batholith is constituted by microgabbros to quartz microgabbros and microdiorites to quartz microdiorites, middle to fine-grained equigranular to porphyritic varieties form the Rio Branco Intrusive Basic Suite, showing a discontinuous distribution and located near the margins of the intrusion.Majorly constituted by porphyritic, granophyric and isotropic facies of Rio Branco Intrusive Acid Suit which is composed by older dark red rapakivi monzogranites to quartz monzonites and quartz sienites (1403±0.6 Ma) and the younger red rapakivi leuco-monzogranites (1382±49 Ma) and late equigranular to pegmatitic monzogranites. The magmatism is constituted by two distinct magmas related to the end of the collisional event of Cachoeirinha Orogeny, one with alkaline basalts generated in an intraplate environment and the other postorogenic to anorogenic with peraluminous to metaluminous compositions and define a high-K calc-alkaline to shoshonitic magmatism in transition among the I- and A-types. The contacts are marked by extensive mafic sills and dikes of alkaline basalts derived from intraplate environment of the Salto do Céu Intrusive Basic Suite (±808 Ma) associate to the Sunsás-Aguapei Orogenic Belt and metasedimentary rocks of the Aguapeí Grup.
publishDate 2011
dc.date.none.fl_str_mv 2011-12-06
2014-05-27T11:26:19Z
2014-05-27T11:26:19Z
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.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/5535
Geociencias, v. 30, n. 2, p. 173-195, 2011.
0101-9082
1980-900X
http://hdl.handle.net/11449/73047
2-s2.0-82555173101
2-s2.0-82555173101.pdf
4020121129398235
url http://www.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/5535
http://hdl.handle.net/11449/73047
identifier_str_mv Geociencias, v. 30, n. 2, p. 173-195, 2011.
0101-9082
1980-900X
2-s2.0-82555173101
2-s2.0-82555173101.pdf
4020121129398235
dc.language.iso.fl_str_mv eng
por
language eng
por
dc.relation.none.fl_str_mv Geociências
0,230
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 173-195
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128255729860608

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