Geocronologia do maciço Granítico Sararé no SW do Cráton Amazônico
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://www.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/3502 http://hdl.handle.net/11449/71244 |
Resumo: | Sararé Massif occurs in the southwest Mato Grosso state intruded into Mesoproterozoic units of the Jauru Block inside the Amazonian Craton. It presents an extension of approximately 80 km2 and NW-SE tectonic structures control the elongated shape. It is constituted by three major monzogranitic petrographic facies, represented by leucocratic, reddish, isotropic, equi-inequigranular to locally porphyritic rocks. The composition indicates S-type, peraluminous, with indicatives of late- to post-kinematic magmatism. Geochronological studies with 40Ar/39Ar in biotites and muscovites resulted in ages of 903 to 906 Ma was interpreted as massif rocks cooling period and U-PB 917 ± 18 Ma. ages points to the crystallization of the intrusive body. The massif is formed by melting of material of the upper crust, in an environment of continental collision and/or of post-collisional decompression at the ending of the Aguapeí-Sunsás event, in more stable environments of consolidation and tectonic stabilization of the Amazonian Craton. |
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Geocronologia do maciço Granítico Sararé no SW do Cráton AmazônicoGeochronologic of the Sararé granitic massif in the SW Amazonian CratonAmazonian cratonGeochronologySararé massifage determinationargon-argon datingconsolidationcontinental lithospherecratoncrystallizationdecompressiongeochronologygranitegranitoidmagmatismmountainpetrographyporphyrystabilizationBrazilBrazilian ShieldMato GrossoSarareSouth AmericaSararé Massif occurs in the southwest Mato Grosso state intruded into Mesoproterozoic units of the Jauru Block inside the Amazonian Craton. It presents an extension of approximately 80 km2 and NW-SE tectonic structures control the elongated shape. It is constituted by three major monzogranitic petrographic facies, represented by leucocratic, reddish, isotropic, equi-inequigranular to locally porphyritic rocks. The composition indicates S-type, peraluminous, with indicatives of late- to post-kinematic magmatism. Geochronological studies with 40Ar/39Ar in biotites and muscovites resulted in ages of 903 to 906 Ma was interpreted as massif rocks cooling period and U-PB 917 ± 18 Ma. ages points to the crystallization of the intrusive body. The massif is formed by melting of material of the upper crust, in an environment of continental collision and/or of post-collisional decompression at the ending of the Aguapeí-Sunsás event, in more stable environments of consolidation and tectonic stabilization of the Amazonian Craton.O Maciço Sararé ocorre no sudoeste do Estado de Mato Grosso, intrusivo em unidades mesoproterozóicas do Bloco Jauru do Cráton Amazônico. Trata-se de um corpo com 80 km2, forma elíptica a alongada, segundo o trend da tectônica regional NW-SE. É constituído por três fácies petrográficas principais de composição monzograníticas, leucocráticas, vermelhas, isotrópicas a foliadas na borda e equi- a inequigranulares a localmente porfiríticas. Constitui num granito do Tipo S, peraluminoso, tardi a pós-cinemático, apresentam idades 40Ar/39Ar obtidas a partir de biotitas e muscovitas de 903 a 906 Ma. interpretada como o período de resfriamento das rochas do maciço e idade U-Pb de 917 ± 18 Ma. interpretada como idade de cristalização do corpo intrusivo. As rochas do maciço foram geradas a partir da fusão de material da crosta superior, em ambiente de colisão continental e/ou de descompressão pós-colisional, pertence ao magmatismo regional tardi a pós-cinemático ao final do evento Aguapeí-Sunsás, e da estabilização tectônica do extremo meridional do Cráton Amazônico.Instituto de Ciências Ambientais e Desenvolvimento Sustentável - ICAD Universidade Federal da Bahia/Campus Reitor Edgard Santos, Rua Prof. José Seabra, s/n - Centro, 47805-100. Barreiras, BADepartamento de Petrologia e Metalogenia Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista, UNESP/Campus Rio Claro. Avenida 24-A, 1515 - Bela Vista, 13506-900. Rio Claro, SPDepartamento de Geologia Geral Instituto de Ciências Exatas e da Terra Universidade Federal de Mato Grosso, UFMT, Avenida Fernando Corrêa, s/n - Coxipó, 78060-900. Cuiabá, MTDepartamento de Petrologia e Metalogenia Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista, UNESP/Campus Rio Claro. Avenida 24-A, 1515 - Bela Vista, 13506-900. Rio Claro, SPUniversidade Federal da Bahia (UFBA)Universidade Estadual Paulista (Unesp)Universidade Federal de Mato Grosso (UFMT)de Araújo, Larissa Marques BarbosaGodoy, Antonio Misson [UNESP]Ruiz, Amarildo Salina2014-05-27T11:24:02Z2014-05-27T11:24:02Z2009-11-19info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article53-64application/pdfhttp://www.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/3502Geociencias, v. 28, n. 1, p. 53-64, 2009.0101-90821980-900Xhttp://hdl.handle.net/11449/712442-s2.0-704494850262-s2.0-70449485026.pdf4020121129398235Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporGeociências0,230info:eu-repo/semantics/openAccess2023-12-09T06:23:52Zoai:repositorio.unesp.br:11449/71244Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-09T06:23:52Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Geocronologia do maciço Granítico Sararé no SW do Cráton Amazônico Geochronologic of the Sararé granitic massif in the SW Amazonian Craton |
title |
Geocronologia do maciço Granítico Sararé no SW do Cráton Amazônico |
spellingShingle |
Geocronologia do maciço Granítico Sararé no SW do Cráton Amazônico de Araújo, Larissa Marques Barbosa Amazonian craton Geochronology Sararé massif age determination argon-argon dating consolidation continental lithosphere craton crystallization decompression geochronology granite granitoid magmatism mountain petrography porphyry stabilization Brazil Brazilian Shield Mato Grosso Sarare South America |
title_short |
Geocronologia do maciço Granítico Sararé no SW do Cráton Amazônico |
title_full |
Geocronologia do maciço Granítico Sararé no SW do Cráton Amazônico |
title_fullStr |
Geocronologia do maciço Granítico Sararé no SW do Cráton Amazônico |
title_full_unstemmed |
Geocronologia do maciço Granítico Sararé no SW do Cráton Amazônico |
title_sort |
Geocronologia do maciço Granítico Sararé no SW do Cráton Amazônico |
author |
de Araújo, Larissa Marques Barbosa |
author_facet |
de Araújo, Larissa Marques Barbosa Godoy, Antonio Misson [UNESP] Ruiz, Amarildo Salina |
author_role |
author |
author2 |
Godoy, Antonio Misson [UNESP] Ruiz, Amarildo Salina |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Federal da Bahia (UFBA) Universidade Estadual Paulista (Unesp) Universidade Federal de Mato Grosso (UFMT) |
dc.contributor.author.fl_str_mv |
de Araújo, Larissa Marques Barbosa Godoy, Antonio Misson [UNESP] Ruiz, Amarildo Salina |
dc.subject.por.fl_str_mv |
Amazonian craton Geochronology Sararé massif age determination argon-argon dating consolidation continental lithosphere craton crystallization decompression geochronology granite granitoid magmatism mountain petrography porphyry stabilization Brazil Brazilian Shield Mato Grosso Sarare South America |
topic |
Amazonian craton Geochronology Sararé massif age determination argon-argon dating consolidation continental lithosphere craton crystallization decompression geochronology granite granitoid magmatism mountain petrography porphyry stabilization Brazil Brazilian Shield Mato Grosso Sarare South America |
description |
Sararé Massif occurs in the southwest Mato Grosso state intruded into Mesoproterozoic units of the Jauru Block inside the Amazonian Craton. It presents an extension of approximately 80 km2 and NW-SE tectonic structures control the elongated shape. It is constituted by three major monzogranitic petrographic facies, represented by leucocratic, reddish, isotropic, equi-inequigranular to locally porphyritic rocks. The composition indicates S-type, peraluminous, with indicatives of late- to post-kinematic magmatism. Geochronological studies with 40Ar/39Ar in biotites and muscovites resulted in ages of 903 to 906 Ma was interpreted as massif rocks cooling period and U-PB 917 ± 18 Ma. ages points to the crystallization of the intrusive body. The massif is formed by melting of material of the upper crust, in an environment of continental collision and/or of post-collisional decompression at the ending of the Aguapeí-Sunsás event, in more stable environments of consolidation and tectonic stabilization of the Amazonian Craton. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-11-19 2014-05-27T11:24:02Z 2014-05-27T11:24:02Z |
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/3502 Geociencias, v. 28, n. 1, p. 53-64, 2009. 0101-9082 1980-900X http://hdl.handle.net/11449/71244 2-s2.0-70449485026 2-s2.0-70449485026.pdf 4020121129398235 |
url |
http://www.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/3502 http://hdl.handle.net/11449/71244 |
identifier_str_mv |
Geociencias, v. 28, n. 1, p. 53-64, 2009. 0101-9082 1980-900X 2-s2.0-70449485026 2-s2.0-70449485026.pdf 4020121129398235 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Geociências 0,230 |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
53-64 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 |
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Repositório Institucional da UNESP |
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Repositório Institucional da UNESP |
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Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
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1803046873009750016 |