Superposition relations of microfabrics in the northern hanging-wall block

Detalhes bibliográficos
Autor(a) principal: Dias da Silva, Icaro F
Data de Publicação: 2016
Outros Autores: Pereira, M Francisco, Silva, Jose B
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/20477
Resumo: This study reports alternation of D2 extension-related and D3 contraction-related microfabrics in the northern hanging wall block of a gneiss dome-like structure recognized in the Évora Massif (Ossa-Morena Zone). In the Arraiolos – Santo Antonio de Alcorrego traverse high- to low-grade mylonites are dominant. Microfabrics related to D2 ductile deformation and M2 high-amphibolite to greenschist facies characterize an extensional shear zone with telescoping metamorphic isograds. D2 microstructures indicate shear sense with top-to-SE. Superposition of D3 contraction developed under greenschist facies (M3) producing folding of D2 microfabrics, mylonitization of granites along strike-slip shear zones and retrogression of M2 mineral assemblages.
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spelling Superposition relations of microfabrics in the northern hanging-wall blockGneiss domehigh- to low-grade mylonitizationD2 microfabricsD3 microfabricsVariscan OrogenThis study reports alternation of D2 extension-related and D3 contraction-related microfabrics in the northern hanging wall block of a gneiss dome-like structure recognized in the Évora Massif (Ossa-Morena Zone). In the Arraiolos – Santo Antonio de Alcorrego traverse high- to low-grade mylonites are dominant. Microfabrics related to D2 ductile deformation and M2 high-amphibolite to greenschist facies characterize an extensional shear zone with telescoping metamorphic isograds. D2 microstructures indicate shear sense with top-to-SE. Superposition of D3 contraction developed under greenschist facies (M3) producing folding of D2 microfabrics, mylonitization of granites along strike-slip shear zones and retrogression of M2 mineral assemblages.Sociedad Geologica de Espana2017-01-31T13:17:01Z2017-01-312016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/20477http://hdl.handle.net/10174/20477engDias da Silva IF, Pereira MF, Silva JB, 2016. Superposition relations of microfabrics in the northern hanging-wall block. Geotemas 16:455-458 of the Évora Massif (Ossa-Morena Zone)simnaonaondndndDias da Silva, Icaro FPereira, M FranciscoSilva, Jose Binfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:10:18Zoai:dspace.uevora.pt:10174/20477Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:11:54.037289Repositório 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 Superposition relations of microfabrics in the northern hanging-wall block
title Superposition relations of microfabrics in the northern hanging-wall block
spellingShingle Superposition relations of microfabrics in the northern hanging-wall block
Dias da Silva, Icaro F
Gneiss dome
high- to low-grade mylonitization
D2 microfabrics
D3 microfabrics
Variscan Orogen
title_short Superposition relations of microfabrics in the northern hanging-wall block
title_full Superposition relations of microfabrics in the northern hanging-wall block
title_fullStr Superposition relations of microfabrics in the northern hanging-wall block
title_full_unstemmed Superposition relations of microfabrics in the northern hanging-wall block
title_sort Superposition relations of microfabrics in the northern hanging-wall block
author Dias da Silva, Icaro F
author_facet Dias da Silva, Icaro F
Pereira, M Francisco
Silva, Jose B
author_role author
author2 Pereira, M Francisco
Silva, Jose B
author2_role author
author
dc.contributor.author.fl_str_mv Dias da Silva, Icaro F
Pereira, M Francisco
Silva, Jose B
dc.subject.por.fl_str_mv Gneiss dome
high- to low-grade mylonitization
D2 microfabrics
D3 microfabrics
Variscan Orogen
topic Gneiss dome
high- to low-grade mylonitization
D2 microfabrics
D3 microfabrics
Variscan Orogen
description This study reports alternation of D2 extension-related and D3 contraction-related microfabrics in the northern hanging wall block of a gneiss dome-like structure recognized in the Évora Massif (Ossa-Morena Zone). In the Arraiolos – Santo Antonio de Alcorrego traverse high- to low-grade mylonites are dominant. Microfabrics related to D2 ductile deformation and M2 high-amphibolite to greenschist facies characterize an extensional shear zone with telescoping metamorphic isograds. D2 microstructures indicate shear sense with top-to-SE. Superposition of D3 contraction developed under greenschist facies (M3) producing folding of D2 microfabrics, mylonitization of granites along strike-slip shear zones and retrogression of M2 mineral assemblages.
publishDate 2016
dc.date.none.fl_str_mv 2016-01-01T00:00:00Z
2017-01-31T13:17:01Z
2017-01-31
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/conferenceObject
format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/20477
http://hdl.handle.net/10174/20477
url http://hdl.handle.net/10174/20477
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Dias da Silva IF, Pereira MF, Silva JB, 2016. Superposition relations of microfabrics in the northern hanging-wall block. Geotemas 16:455-458 of the Évora Massif (Ossa-Morena Zone)
sim
nao
nao
nd
nd
nd
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Sociedad Geologica de Espana
publisher.none.fl_str_mv Sociedad Geologica de Espana
dc.source.none.fl_str_mv 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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