Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil

The eastern part of the Guiana Shield, northern Amazonian Craton, in South America, represents a large orogenic belt developed during the Transamazonian orogenic cycle (2.26-1.95 Ga), which consists of extensive areas of Paleoproterozoic crust and two major Archean terranes: the Imataca Block, in Ve...

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Detalhes bibliográficos
Autores: ROSA-COSTA, Lúcia Travassos da, LAFON, Jean-Michel, DELOR, Claude
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2006
País:Brasil
Recursos:Companhia de Pesquisa de Recursos Minerais (CPRM)
Repositório:Repositório Institucional de Geociências - RIGEO
Idioma:inglês
OAI Identifier:oai:rigeo.sgb.gov.br:doc/582
Acesso em linha:https://rigeo.sgb.gov.br/handle/doc/582
Access Level:Acceso aberto
Palavra-chave:GEOCRONOLOGIA
GEOQUÍMICA
PALEOPROTEROZOICO
OROGÊNESE
BRASIL
AMAZONAS
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spelling Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, BrasilGEOCRONOLOGIAGEOQUÍMICAPALEOPROTEROZOICOOROGÊNESEBRASILAMAZONASThe eastern part of the Guiana Shield, northern Amazonian Craton, in South America, represents a large orogenic belt developed during the Transamazonian orogenic cycle (2.26-1.95 Ga), which consists of extensive areas of Paleoproterozoic crust and two major Archean terranes: the Imataca Block, in Venezuela, and the here defined Amapá Block, in the north of Brazil. Pb-evaporation on zircon and Sm Nd on whole rock dating were provided on magmatic and metamorphic units from southwestern Amap¨¢ Block, in the Jari Domain, defining its long-lived evolution, marked by several stages of crustal accretion and crustal reworking. Magmatic activity occurred mainly at the Meso-Neoarchean transition (2.80-2.79 Ga) and during the Neoarchean (2.66-2.60 Ga). The main period of crust formation occurred during a protracted episode at the end of Paleoarchean and along the whole Mesoarchean (3.26-2.83 Ga)........ The lithological association and the available isotopic data registered in the Carecuru Domain suggests a geodynamic evolution model based on the development of a magmatic arc system during the Transamazonian orogenic cycle, which was accreted to the southwestern border of the Archean Amapá Block2013-12-19T16:32:44Z2013-12-19T16:32:44Z2006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfROSA-COSTA, Lúcia Travassos da; LAFON, Jean-Michel; DELOR, Claude. Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil. Gondwana Research, Kochi, v.10, n., p.277-300, Kochi.https://rigeo.sgb.gov.br/handle/doc/582ark:/79692/0013000001jfdengreponame:Repositório Institucional de Geociências - RIGEOinstname:Companhia de Pesquisa de Recursos Minerais (CPRM)instacron:CPRMinfo:eu-repo/semantics/openAccessROSA-COSTA, Lúcia Travassos daLAFON, Jean-MichelDELOR, Claude2025-08-20T21:04:23Zoai:rigeo.sgb.gov.br:doc/582Repositório InstitucionalONGhttps://rigeo.sgb.gov.br/oai/requestrigeo@sgb.gov.bropendoar:43362025-08-20T21:04:23Repositório Institucional de Geociências - RIGEO - Companhia de Pesquisa de Recursos Minerais (CPRM)false
dc.title.none.fl_str_mv Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil
title Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil
spellingShingle Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil
ROSA-COSTA, Lúcia Travassos da
GEOCRONOLOGIA
GEOQUÍMICA
PALEOPROTEROZOICO
OROGÊNESE
BRASIL
AMAZONAS
title_short Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil
title_full Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil
title_fullStr Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil
title_full_unstemmed Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil
title_sort Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil
dc.creator.none.fl_str_mv ROSA-COSTA, Lúcia Travassos da
LAFON, Jean-Michel
DELOR, Claude
author ROSA-COSTA, Lúcia Travassos da
author_facet ROSA-COSTA, Lúcia Travassos da
LAFON, Jean-Michel
DELOR, Claude
author_role author
author2 LAFON, Jean-Michel
DELOR, Claude
author2_role author
author
dc.subject.por.fl_str_mv GEOCRONOLOGIA
GEOQUÍMICA
PALEOPROTEROZOICO
OROGÊNESE
BRASIL
AMAZONAS
topic GEOCRONOLOGIA
GEOQUÍMICA
PALEOPROTEROZOICO
OROGÊNESE
BRASIL
AMAZONAS
description The eastern part of the Guiana Shield, northern Amazonian Craton, in South America, represents a large orogenic belt developed during the Transamazonian orogenic cycle (2.26-1.95 Ga), which consists of extensive areas of Paleoproterozoic crust and two major Archean terranes: the Imataca Block, in Venezuela, and the here defined Amapá Block, in the north of Brazil. Pb-evaporation on zircon and Sm Nd on whole rock dating were provided on magmatic and metamorphic units from southwestern Amap¨¢ Block, in the Jari Domain, defining its long-lived evolution, marked by several stages of crustal accretion and crustal reworking. Magmatic activity occurred mainly at the Meso-Neoarchean transition (2.80-2.79 Ga) and during the Neoarchean (2.66-2.60 Ga). The main period of crust formation occurred during a protracted episode at the end of Paleoarchean and along the whole Mesoarchean (3.26-2.83 Ga)........ The lithological association and the available isotopic data registered in the Carecuru Domain suggests a geodynamic evolution model based on the development of a magmatic arc system during the Transamazonian orogenic cycle, which was accreted to the southwestern border of the Archean Amapá Block
publishDate 2006
dc.date.none.fl_str_mv 2006
2013-12-19T16:32:44Z
2013-12-19T16:32:44Z
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 ROSA-COSTA, Lúcia Travassos da; LAFON, Jean-Michel; DELOR, Claude. Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil. Gondwana Research, Kochi, v.10, n., p.277-300, Kochi.
https://rigeo.sgb.gov.br/handle/doc/582
dc.identifier.dark.fl_str_mv ark:/79692/0013000001jfd
identifier_str_mv ROSA-COSTA, Lúcia Travassos da; LAFON, Jean-Michel; DELOR, Claude. Zircon geochronology and Sm-Nd isotopic study: Further constraints for the Archean and Paleoproterozoic geodynamical evolution of the southeastern Guiana Shield north of Amazonian Craton, Brasil. Gondwana Research, Kochi, v.10, n., p.277-300, Kochi.
ark:/79692/0013000001jfd
url https://rigeo.sgb.gov.br/handle/doc/582
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.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional de Geociências - RIGEO
instname:Companhia de Pesquisa de Recursos Minerais (CPRM)
instacron:CPRM
instname_str Companhia de Pesquisa de Recursos Minerais (CPRM)
instacron_str CPRM
institution CPRM
reponame_str Repositório Institucional de Geociências - RIGEO
collection Repositório Institucional de Geociências - RIGEO
repository.name.fl_str_mv Repositório Institucional de Geociências - RIGEO - Companhia de Pesquisa de Recursos Minerais (CPRM)
repository.mail.fl_str_mv rigeo@sgb.gov.br
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score 15,301629

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