Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal)

Detalhes bibliográficos
Autor(a) principal: Pamplona, J.
Data de Publicação: 2006
Outros Autores: Gutiérrez-Alonso, Gabriel, Ribeiro, António
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/1822/84175
Resumo: The Viana do Castelo region of NW Portugal is the only domain in the West Variscan where the transition from the D-1 strike-slip structures to the D-1 east vergent flat-lying structures, formed during Devonian-Carboniferous continental collision, has been recognized. Although intrusion of voluminous granite bodies has resulted in extensive recrystallization of host rocks, kinematic analysis of these rocks, using mesoscopic criteria and quartz CPOs (crystallographic preferred orientation) reveals shear senses coherent with the field evidence and suggests that D-1 deformation was partitioned into transpressional and compressional components. We also interpret the strain patterns to the effects of non-cylindrical superposed shear zones. The above aspects can be useful to understand the complex tectonic evolution of the most internal zone of the Variscan Belt and of other internal zones of collisional orogenic belts with similar characteristics.
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spelling Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal)evolution of internal zones of Variscan Beltpartition of deformationsuperposed shear zonesquartz CPOsCiências Naturais::Ciências da Terra e do AmbienteScience & TechnologyThe Viana do Castelo region of NW Portugal is the only domain in the West Variscan where the transition from the D-1 strike-slip structures to the D-1 east vergent flat-lying structures, formed during Devonian-Carboniferous continental collision, has been recognized. Although intrusion of voluminous granite bodies has resulted in extensive recrystallization of host rocks, kinematic analysis of these rocks, using mesoscopic criteria and quartz CPOs (crystallographic preferred orientation) reveals shear senses coherent with the field evidence and suggests that D-1 deformation was partitioned into transpressional and compressional components. We also interpret the strain patterns to the effects of non-cylindrical superposed shear zones. The above aspects can be useful to understand the complex tectonic evolution of the most internal zone of the Variscan Belt and of other internal zones of collisional orogenic belts with similar characteristics.Partial funding to GGA was provided by project BTE2003-05128 from the Spanish “Ministerio de Ciencia y Tecnología”. Partial funding to JP was provided by the Fundação para a Ciência e Tecnologia. Very insightful and helpful reviews were done by J.B. Murphy, J. Weber and an anonymous reviewer, which are greatly acknowledged.ElsevierUniversidade do MinhoPamplona, J.Gutiérrez-Alonso, GabrielRibeiro, António20062006-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/84175engPamplona, J., Gutiérrez-Alonso, G., & Ribeiro, A. (2006, July). Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal). Journal of Structural Geology. Elsevier BV. http://doi.org/10.1016/j.jsg.2006.03.0290191-81411873-120110.1016/j.jsg.2006.03.029https://www.sciencedirect.com/science/article/pii/S019181410600085Xinfo: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:RCAAP2023-07-21T12:06:10Zoai:repositorium.sdum.uminho.pt:1822/84175Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:56:46.053130Repositório 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 of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal)
title Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal)
spellingShingle Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal)
Pamplona, J.
evolution of internal zones of Variscan Belt
partition of deformation
superposed shear zones
quartz CPOs
Ciências Naturais::Ciências da Terra e do Ambiente
Science & Technology
title_short Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal)
title_full Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal)
title_fullStr Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal)
title_full_unstemmed Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal)
title_sort Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal)
author Pamplona, J.
author_facet Pamplona, J.
Gutiérrez-Alonso, Gabriel
Ribeiro, António
author_role author
author2 Gutiérrez-Alonso, Gabriel
Ribeiro, António
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Pamplona, J.
Gutiérrez-Alonso, Gabriel
Ribeiro, António
dc.subject.por.fl_str_mv evolution of internal zones of Variscan Belt
partition of deformation
superposed shear zones
quartz CPOs
Ciências Naturais::Ciências da Terra e do Ambiente
Science & Technology
topic evolution of internal zones of Variscan Belt
partition of deformation
superposed shear zones
quartz CPOs
Ciências Naturais::Ciências da Terra e do Ambiente
Science & Technology
description The Viana do Castelo region of NW Portugal is the only domain in the West Variscan where the transition from the D-1 strike-slip structures to the D-1 east vergent flat-lying structures, formed during Devonian-Carboniferous continental collision, has been recognized. Although intrusion of voluminous granite bodies has resulted in extensive recrystallization of host rocks, kinematic analysis of these rocks, using mesoscopic criteria and quartz CPOs (crystallographic preferred orientation) reveals shear senses coherent with the field evidence and suggests that D-1 deformation was partitioned into transpressional and compressional components. We also interpret the strain patterns to the effects of non-cylindrical superposed shear zones. The above aspects can be useful to understand the complex tectonic evolution of the most internal zone of the Variscan Belt and of other internal zones of collisional orogenic belts with similar characteristics.
publishDate 2006
dc.date.none.fl_str_mv 2006
2006-01-01T00:00:00Z
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 https://hdl.handle.net/1822/84175
url https://hdl.handle.net/1822/84175
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Pamplona, J., Gutiérrez-Alonso, G., & Ribeiro, A. (2006, July). Superposition of shear zones during orogenic development: an example from the NW Variscan Belt (Viana do Castelo, NW Portugal). Journal of Structural Geology. Elsevier BV. http://doi.org/10.1016/j.jsg.2006.03.029
0191-8141
1873-1201
10.1016/j.jsg.2006.03.029
https://www.sciencedirect.com/science/article/pii/S019181410600085X
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.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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
repository.mail.fl_str_mv
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