Assumptions and problems with Fe-Mg garnet - biotite diffusion based petrological cooling rates: a case study in granulites and migmatites fromcentral Ribeira Fold Belt, SE Brazil

Detalhes bibliográficos
Autor(a) principal: Santos,T. M. Bento dos
Data de Publicação: 2009
Outros Autores: Munhá,J. M. U., Tassinari,C. C. G., Fonseca,P. E.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://scielo.pt/scielo.php?script=sci_arttext&pid=S1647-581X2009000100006
Resumo: The São Fidelis - Santo António de Pádua sector of central Ribeira Fold Belt is mainly composed of migmatites, granulites and blastomylonites. Application of two contrasting methodologies to obtain petrological cooling rates based on Fe-Mg diffusion between garnet and respective biotite inclusions proved unfruitful. This was mainly due to: a) high dispersion of results caused by open-system behaviour; and b) narrow closure temperature variation caused by garnet reequilibration at high temperatures followed by very fast cooling. The obtained results are mainly qualitative but in broad agreement with previously obtained thermochronological results based on integration of multiple isotopic systems.
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spelling Assumptions and problems with Fe-Mg garnet - biotite diffusion based petrological cooling rates: a case study in granulites and migmatites fromcentral Ribeira Fold Belt, SE BrazilPetrological cooling ratesFe-Mg diffusionRibeira Fold BeltThe São Fidelis - Santo António de Pádua sector of central Ribeira Fold Belt is mainly composed of migmatites, granulites and blastomylonites. Application of two contrasting methodologies to obtain petrological cooling rates based on Fe-Mg diffusion between garnet and respective biotite inclusions proved unfruitful. This was mainly due to: a) high dispersion of results caused by open-system behaviour; and b) narrow closure temperature variation caused by garnet reequilibration at high temperatures followed by very fast cooling. The obtained results are mainly qualitative but in broad agreement with previously obtained thermochronological results based on integration of multiple isotopic systems.LNEG - Laboratório Nacional de Energia e Geologia2009-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S1647-581X2009000100006Comunicações Geológicas n.96 2009reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPenghttp://scielo.pt/scielo.php?script=sci_arttext&pid=S1647-581X2009000100006Santos,T. M. Bento dosMunhá,J. M. U.Tassinari,C. C. G.Fonseca,P. E.info:eu-repo/semantics/openAccess2024-02-06T17:25:03Zoai:scielo:S1647-581X2009000100006Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:30:38.923093Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Assumptions and problems with Fe-Mg garnet - biotite diffusion based petrological cooling rates: a case study in granulites and migmatites fromcentral Ribeira Fold Belt, SE Brazil
title Assumptions and problems with Fe-Mg garnet - biotite diffusion based petrological cooling rates: a case study in granulites and migmatites fromcentral Ribeira Fold Belt, SE Brazil
spellingShingle Assumptions and problems with Fe-Mg garnet - biotite diffusion based petrological cooling rates: a case study in granulites and migmatites fromcentral Ribeira Fold Belt, SE Brazil
Santos,T. M. Bento dos
Petrological cooling rates
Fe-Mg diffusion
Ribeira Fold Belt
title_short Assumptions and problems with Fe-Mg garnet - biotite diffusion based petrological cooling rates: a case study in granulites and migmatites fromcentral Ribeira Fold Belt, SE Brazil
title_full Assumptions and problems with Fe-Mg garnet - biotite diffusion based petrological cooling rates: a case study in granulites and migmatites fromcentral Ribeira Fold Belt, SE Brazil
title_fullStr Assumptions and problems with Fe-Mg garnet - biotite diffusion based petrological cooling rates: a case study in granulites and migmatites fromcentral Ribeira Fold Belt, SE Brazil
title_full_unstemmed Assumptions and problems with Fe-Mg garnet - biotite diffusion based petrological cooling rates: a case study in granulites and migmatites fromcentral Ribeira Fold Belt, SE Brazil
title_sort Assumptions and problems with Fe-Mg garnet - biotite diffusion based petrological cooling rates: a case study in granulites and migmatites fromcentral Ribeira Fold Belt, SE Brazil
author Santos,T. M. Bento dos
author_facet Santos,T. M. Bento dos
Munhá,J. M. U.
Tassinari,C. C. G.
Fonseca,P. E.
author_role author
author2 Munhá,J. M. U.
Tassinari,C. C. G.
Fonseca,P. E.
author2_role author
author
author
dc.contributor.author.fl_str_mv Santos,T. M. Bento dos
Munhá,J. M. U.
Tassinari,C. C. G.
Fonseca,P. E.
dc.subject.por.fl_str_mv Petrological cooling rates
Fe-Mg diffusion
Ribeira Fold Belt
topic Petrological cooling rates
Fe-Mg diffusion
Ribeira Fold Belt
description The São Fidelis - Santo António de Pádua sector of central Ribeira Fold Belt is mainly composed of migmatites, granulites and blastomylonites. Application of two contrasting methodologies to obtain petrological cooling rates based on Fe-Mg diffusion between garnet and respective biotite inclusions proved unfruitful. This was mainly due to: a) high dispersion of results caused by open-system behaviour; and b) narrow closure temperature variation caused by garnet reequilibration at high temperatures followed by very fast cooling. The obtained results are mainly qualitative but in broad agreement with previously obtained thermochronological results based on integration of multiple isotopic systems.
publishDate 2009
dc.date.none.fl_str_mv 2009-01-01
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://scielo.pt/scielo.php?script=sci_arttext&pid=S1647-581X2009000100006
url http://scielo.pt/scielo.php?script=sci_arttext&pid=S1647-581X2009000100006
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://scielo.pt/scielo.php?script=sci_arttext&pid=S1647-581X2009000100006
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv LNEG - Laboratório Nacional de Energia e Geologia
publisher.none.fl_str_mv LNEG - Laboratório Nacional de Energia e Geologia
dc.source.none.fl_str_mv Comunicações Geológicas n.96 2009
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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