Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution

Detalhes bibliográficos
Autor(a) principal: KLEIN, Evandro L.
Data de Publicação: 2009
Outros Autores: LUZARDO, Rene, MOURA, Candido A. V., LOBATO, Denise C., BRITO, Reinaldo S. C., ARMSTRONG, Richard
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional de Geociências - RIGEO
Texto Completo: https://rigeo.cprm.gov.br/handle/doc/566
Resumo: New field work, in addition to zircon geochronology, Nd isotopes and reconnaissance geochemical data allow the recognition of Paleoproterozoic volcanic and metavolcanic sequences in the São Luís Craton of northern Brazil. These sequences record at least five volcanic pulses occurring probably in three distinct epochs and in different tectonic settings. 1. The Pirocaua Formation of the Aurizona Group comprises early arc-related calc-alkaline metapyroclastic rocks of 2240 ± 5 Ma formed from juvenile protoliths in addition to minor older crustal components. 2. The Matará Formation of the Aurizona Group holds mafic tholeiitic and ultramafic metavolcanic rocks of back arc and/or island arc setting, which are likely coeval to the Pirocaua Formation. 3. The Serra do Jacaré volcanic unit is composed of tholeiitic basalts and predominantly metaluminous, normal- to high-K calc-alkaline andesites of 2164 ± 3 Ma formed in mature arc or active continental margin from juvenile protoliths along with subordinate older (Paleoproterozoic) materials and associated to the main calc-alkaline orogenic stage. 4. The Rio Diamante Formation consists of late-orogenic metaluminous, medium-K, calc-alkaline rhyolite to dacite and tuffs of 2160 ± 8 Ma formed in continental margin setting from reworked Paleoproterozoic crust (island arc) with incipient Archean contribution. 5. The Rosilha volcanic unit is composed of weakly peraluminous, medium-K, calc-alkaline dacite and tuff formed probably at about 2068 Ma from reworked crustal protoliths. As a whole the volcanic and metavolcanic rocks record and characterized better the previously proposed orogenic evolution of the São Luís Craton
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spelling KLEIN, Evandro L.LUZARDO, ReneMOURA, Candido A. V.LOBATO, Denise C.BRITO, Reinaldo S. C.ARMSTRONG, Richard2013-12-19T16:32:41Z2013-12-19T16:32:41Z2009KLEIN, Evandro L; LUZARDO, Rene; MOURA, Candido A. V; LOBATO, Denise C; BRITO, Reinaldo S. C; ARMSTRONG, Richard. Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution. Journal of South American Earth Sciences, Oxford, v.v. 27, n.1/2, p.129-145, Oxford.https://rigeo.cprm.gov.br/handle/doc/566New field work, in addition to zircon geochronology, Nd isotopes and reconnaissance geochemical data allow the recognition of Paleoproterozoic volcanic and metavolcanic sequences in the São Luís Craton of northern Brazil. These sequences record at least five volcanic pulses occurring probably in three distinct epochs and in different tectonic settings. 1. The Pirocaua Formation of the Aurizona Group comprises early arc-related calc-alkaline metapyroclastic rocks of 2240 ± 5 Ma formed from juvenile protoliths in addition to minor older crustal components. 2. The Matará Formation of the Aurizona Group holds mafic tholeiitic and ultramafic metavolcanic rocks of back arc and/or island arc setting, which are likely coeval to the Pirocaua Formation. 3. The Serra do Jacaré volcanic unit is composed of tholeiitic basalts and predominantly metaluminous, normal- to high-K calc-alkaline andesites of 2164 ± 3 Ma formed in mature arc or active continental margin from juvenile protoliths along with subordinate older (Paleoproterozoic) materials and associated to the main calc-alkaline orogenic stage. 4. The Rio Diamante Formation consists of late-orogenic metaluminous, medium-K, calc-alkaline rhyolite to dacite and tuffs of 2160 ± 8 Ma formed in continental margin setting from reworked Paleoproterozoic crust (island arc) with incipient Archean contribution. 5. The Rosilha volcanic unit is composed of weakly peraluminous, medium-K, calc-alkaline dacite and tuff formed probably at about 2068 Ma from reworked crustal protoliths. As a whole the volcanic and metavolcanic rocks record and characterized better the previously proposed orogenic evolution of the São Luís CratonGEOQUÍMICAGEOCRONOLOGIAISÓTOPOSCRÁTON SÃO LUÍSROCHAS VULCÂNICASPALEOPROTEROZOICOBRASILMARANHÃOGeochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolutioninfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleOxfordengreponame:Repositório Institucional de Geociências - RIGEOinstname:Companhia de Pesquisa de Recursos Minerais (CPRM)instacron:CPRMinfo:eu-repo/semantics/openAccessTEXTart_klein09_jsaes.pdf.txtart_klein09_jsaes.pdf.txtExtracted texttext/plain67434http://rigeo.cprm.gov.br/jspui/bitstream/doc/566/2/art_klein09_jsaes.pdf.txtee4a38e1490765438ab8edca4b136988MD52THUMBNAILart_klein09_jsaes.pdf.jpgart_klein09_jsaes.pdf.jpgGenerated Thumbnailimage/jpeg1645http://rigeo.cprm.gov.br/jspui/bitstream/doc/566/3/art_klein09_jsaes.pdf.jpg20b71c22c0f854ee44e9ab87fc584057MD53ORIGINALart_klein09_jsaes.pdfart_klein09_jsaes.pdfproducao cientificaapplication/pdf1681488http://rigeo.cprm.gov.br/jspui/bitstream/doc/566/1/art_klein09_jsaes.pdf2953a8f4b3554b8e0684e2b71ade8d80MD51doc/5662023-02-13 11:10:50.165oai:rigeo.sgb.gov.br:doc/566Repositório InstitucionalONGhttps://rigeo.sgb.gov.br/oai/request https://rigeo.cprm.gov.br/oai/requestrigeo@sgb.gov.bropendoar:2023-02-13T14:10:50Repositório Institucional de Geociências - RIGEO - Companhia de Pesquisa de Recursos Minerais (CPRM)false
dc.title.none.fl_str_mv Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution
title Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution
spellingShingle Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution
KLEIN, Evandro L.
GEOQUÍMICA
GEOCRONOLOGIA
ISÓTOPOS
CRÁTON SÃO LUÍS
ROCHAS VULCÂNICAS
PALEOPROTEROZOICO
BRASIL
MARANHÃO
title_short Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution
title_full Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution
title_fullStr Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution
title_full_unstemmed Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution
title_sort Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution
author KLEIN, Evandro L.
author_facet KLEIN, Evandro L.
LUZARDO, Rene
MOURA, Candido A. V.
LOBATO, Denise C.
BRITO, Reinaldo S. C.
ARMSTRONG, Richard
author_role author
author2 LUZARDO, Rene
MOURA, Candido A. V.
LOBATO, Denise C.
BRITO, Reinaldo S. C.
ARMSTRONG, Richard
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv KLEIN, Evandro L.
LUZARDO, Rene
MOURA, Candido A. V.
LOBATO, Denise C.
BRITO, Reinaldo S. C.
ARMSTRONG, Richard
dc.subject.por.fl_str_mv GEOQUÍMICA
GEOCRONOLOGIA
ISÓTOPOS
CRÁTON SÃO LUÍS
ROCHAS VULCÂNICAS
PALEOPROTEROZOICO
BRASIL
MARANHÃO
topic GEOQUÍMICA
GEOCRONOLOGIA
ISÓTOPOS
CRÁTON SÃO LUÍS
ROCHAS VULCÂNICAS
PALEOPROTEROZOICO
BRASIL
MARANHÃO
description New field work, in addition to zircon geochronology, Nd isotopes and reconnaissance geochemical data allow the recognition of Paleoproterozoic volcanic and metavolcanic sequences in the São Luís Craton of northern Brazil. These sequences record at least five volcanic pulses occurring probably in three distinct epochs and in different tectonic settings. 1. The Pirocaua Formation of the Aurizona Group comprises early arc-related calc-alkaline metapyroclastic rocks of 2240 ± 5 Ma formed from juvenile protoliths in addition to minor older crustal components. 2. The Matará Formation of the Aurizona Group holds mafic tholeiitic and ultramafic metavolcanic rocks of back arc and/or island arc setting, which are likely coeval to the Pirocaua Formation. 3. The Serra do Jacaré volcanic unit is composed of tholeiitic basalts and predominantly metaluminous, normal- to high-K calc-alkaline andesites of 2164 ± 3 Ma formed in mature arc or active continental margin from juvenile protoliths along with subordinate older (Paleoproterozoic) materials and associated to the main calc-alkaline orogenic stage. 4. The Rio Diamante Formation consists of late-orogenic metaluminous, medium-K, calc-alkaline rhyolite to dacite and tuffs of 2160 ± 8 Ma formed in continental margin setting from reworked Paleoproterozoic crust (island arc) with incipient Archean contribution. 5. The Rosilha volcanic unit is composed of weakly peraluminous, medium-K, calc-alkaline dacite and tuff formed probably at about 2068 Ma from reworked crustal protoliths. As a whole the volcanic and metavolcanic rocks record and characterized better the previously proposed orogenic evolution of the São Luís Craton
publishDate 2009
dc.date.issued.fl_str_mv 2009
dc.date.accessioned.fl_str_mv 2013-12-19T16:32:41Z
dc.date.available.fl_str_mv 2013-12-19T16:32:41Z
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dc.identifier.citation.fl_str_mv KLEIN, Evandro L; LUZARDO, Rene; MOURA, Candido A. V; LOBATO, Denise C; BRITO, Reinaldo S. C; ARMSTRONG, Richard. Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution. Journal of South American Earth Sciences, Oxford, v.v. 27, n.1/2, p.129-145, Oxford.
dc.identifier.uri.fl_str_mv https://rigeo.cprm.gov.br/handle/doc/566
identifier_str_mv KLEIN, Evandro L; LUZARDO, Rene; MOURA, Candido A. V; LOBATO, Denise C; BRITO, Reinaldo S. C; ARMSTRONG, Richard. Geochronology, Nd isotopes and reconnaissance geochemistry of volcanic and metavolcanic rocks of the Sao Luis Craton, northern Brazil: Implications for tectonic setting and crustal evolution. Journal of South American Earth Sciences, Oxford, v.v. 27, n.1/2, p.129-145, Oxford.
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