Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/27237 |
Resumo: | The Porto-Tomar-Ferreira do Alentejo dextral Shear Zone is one of the most important structures of the Iberian Variscides. In its vicinity, close to Abrantes (Central Portugal), a localized heterogeneous strain pattern developed in a decimetric metamorphic siliceous multilayer. This complex pattern was induced by the D2 dextral shearing of the early S0//S1 foliation in brittle-ductile conditions, giving rise to three main shear zone families. One of these families, with antithetic kinematics, delimits blocks with rigid clockwise rotation surrounded by coeval cataclasites, generating a local domino structure. The proposed geometrical and kinematic analysis, coupled with statistical studies, highlights the relation between subsidiary shear zones and the main shear zone. Despite the heterogeneous strain pattern, a quantitative approach of finite strain was applied based on the restoration of the initial fracture pattern. This approach shows the importance of the cataclastic flow coupled with the translational displacement of the domino domain in solving space problems related to the rigid block rotation. Such processes are key in allowing the rigid block rotation inside shear zones whenever the simple shear component is a fundamental mechanism. |
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7160 |
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Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flowDomino structuresBrittle-ductile deformationHeterogeneous simple shearCataclastic flowIberian VariscidesThe Porto-Tomar-Ferreira do Alentejo dextral Shear Zone is one of the most important structures of the Iberian Variscides. In its vicinity, close to Abrantes (Central Portugal), a localized heterogeneous strain pattern developed in a decimetric metamorphic siliceous multilayer. This complex pattern was induced by the D2 dextral shearing of the early S0//S1 foliation in brittle-ductile conditions, giving rise to three main shear zone families. One of these families, with antithetic kinematics, delimits blocks with rigid clockwise rotation surrounded by coeval cataclasites, generating a local domino structure. The proposed geometrical and kinematic analysis, coupled with statistical studies, highlights the relation between subsidiary shear zones and the main shear zone. Despite the heterogeneous strain pattern, a quantitative approach of finite strain was applied based on the restoration of the initial fracture pattern. This approach shows the importance of the cataclastic flow coupled with the translational displacement of the domino domain in solving space problems related to the rigid block rotation. Such processes are key in allowing the rigid block rotation inside shear zones whenever the simple shear component is a fundamental mechanism.Elsevier2020-02-26T11:34:45Z2020-02-262018-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/27237http://hdl.handle.net/10174/27237porMoreira, N., Dias, R., (2018). Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow. Jour. Struct. Geol., 110, 187–201;Departamento Geociênciasnafm@uevora.ptrdias@uevora.pt395doi: 10.1016/j.jsg.2018.01.010Moreira, NoelDias, Ruiinfo: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:RCAAP2024-01-03T19:22:33Zoai:dspace.uevora.pt:10174/27237Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:17:19.553580Repositório 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 |
Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow |
title |
Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow |
spellingShingle |
Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow Moreira, Noel Domino structures Brittle-ductile deformation Heterogeneous simple shear Cataclastic flow Iberian Variscides |
title_short |
Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow |
title_full |
Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow |
title_fullStr |
Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow |
title_full_unstemmed |
Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow |
title_sort |
Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow |
author |
Moreira, Noel |
author_facet |
Moreira, Noel Dias, Rui |
author_role |
author |
author2 |
Dias, Rui |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Moreira, Noel Dias, Rui |
dc.subject.por.fl_str_mv |
Domino structures Brittle-ductile deformation Heterogeneous simple shear Cataclastic flow Iberian Variscides |
topic |
Domino structures Brittle-ductile deformation Heterogeneous simple shear Cataclastic flow Iberian Variscides |
description |
The Porto-Tomar-Ferreira do Alentejo dextral Shear Zone is one of the most important structures of the Iberian Variscides. In its vicinity, close to Abrantes (Central Portugal), a localized heterogeneous strain pattern developed in a decimetric metamorphic siliceous multilayer. This complex pattern was induced by the D2 dextral shearing of the early S0//S1 foliation in brittle-ductile conditions, giving rise to three main shear zone families. One of these families, with antithetic kinematics, delimits blocks with rigid clockwise rotation surrounded by coeval cataclasites, generating a local domino structure. The proposed geometrical and kinematic analysis, coupled with statistical studies, highlights the relation between subsidiary shear zones and the main shear zone. Despite the heterogeneous strain pattern, a quantitative approach of finite strain was applied based on the restoration of the initial fracture pattern. This approach shows the importance of the cataclastic flow coupled with the translational displacement of the domino domain in solving space problems related to the rigid block rotation. Such processes are key in allowing the rigid block rotation inside shear zones whenever the simple shear component is a fundamental mechanism. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01T00:00:00Z 2020-02-26T11:34:45Z 2020-02-26 |
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://hdl.handle.net/10174/27237 http://hdl.handle.net/10174/27237 |
url |
http://hdl.handle.net/10174/27237 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Moreira, N., Dias, R., (2018). Domino structures evolution in strike-slip shear zones; the importance of the cataclastic flow. Jour. Struct. Geol., 110, 187–201; Departamento Geociências nafm@uevora.pt rdias@uevora.pt 395 doi: 10.1016/j.jsg.2018.01.010 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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 |
|
_version_ |
1799136655449260032 |