Kinematic interpretation of shearband boudins : new parameters and ratios useful in HT simple shear zones
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/11629 |
Resumo: | Shearband boudins (asymmetric boudins showing slip along the inter-boudin surface, which is synthetic with respect to the bulk shear sense) are ubiquitous and well-exposed in HT simple shear zones. The present work aims to extend the methodology of analysis of shearband boudins developed by Goscombe and Passchier (2003). Such shearband boudins represent complex objects that require an adequate methodology for unambiguous kinematic interpretation. We propose new geometric parameters (Bbs, B-t, c’, D’, d, ψ’) in order to describe and identify, with confidence, the kinematics of boudinage in this particular geological framework. The key-observation for kinematic interpretation in simple shear regimes is the boudin axis (Lb) that is commonly present, excluding the necessity to identify the regional stretching lineation (Lx) in the metasedimentary matrix. In monoclinic HT simple shear zones, this approach involves the use of a local displacement plane (Sx), which is always normal to the boudin axis (Lb). |
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Kinematic interpretation of shearband boudins : new parameters and ratios useful in HT simple shear zonesShearband boudinGeometric parametersHT simple shear zonekinematicsScience & TechnologyShearband boudins (asymmetric boudins showing slip along the inter-boudin surface, which is synthetic with respect to the bulk shear sense) are ubiquitous and well-exposed in HT simple shear zones. The present work aims to extend the methodology of analysis of shearband boudins developed by Goscombe and Passchier (2003). Such shearband boudins represent complex objects that require an adequate methodology for unambiguous kinematic interpretation. We propose new geometric parameters (Bbs, B-t, c’, D’, d, ψ’) in order to describe and identify, with confidence, the kinematics of boudinage in this particular geological framework. The key-observation for kinematic interpretation in simple shear regimes is the boudin axis (Lb) that is commonly present, excluding the necessity to identify the regional stretching lineation (Lx) in the metasedimentary matrix. In monoclinic HT simple shear zones, this approach involves the use of a local displacement plane (Sx), which is always normal to the boudin axis (Lb).Partial funding to JP was provided by the Centro de Investigacao GeolUgica, Ordenamento e Valorizacao de Recursos that is supported by the Pluriannual program of the Fundacao para a Cilncia e a Tecnologia, funded by the European Union (FEDER program) and the national budget of the Portuguese Republic. Very insightful and helpful reviews were done by C. Fernandez (University of Huelva) and two reviewers, for which we are grateful. We want to acknowledge to T. Valente (University of Minho) for her suggestions that helped to simplify the manuscript structure and to A. McCaig (University of Leeds) for his final comments and English revision that significantly improved this manuscript.ElsevierUniversidade do MinhoPamplona, J.Rodrigues, Benedito C.2011-012011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/11629eng“Journal of Structural Geology”. ISSN 0191-8141 33:1 (Jan. 20111) 38-50.0191-814110.1016/j.jsg.2010.10.004info: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:RCAAP2023-07-21T12:41:29Zoai:repositorium.sdum.uminho.pt:1822/11629Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:38:29.026510Repositório 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 |
Kinematic interpretation of shearband boudins : new parameters and ratios useful in HT simple shear zones |
title |
Kinematic interpretation of shearband boudins : new parameters and ratios useful in HT simple shear zones |
spellingShingle |
Kinematic interpretation of shearband boudins : new parameters and ratios useful in HT simple shear zones Pamplona, J. Shearband boudin Geometric parameters HT simple shear zone kinematics Science & Technology |
title_short |
Kinematic interpretation of shearband boudins : new parameters and ratios useful in HT simple shear zones |
title_full |
Kinematic interpretation of shearband boudins : new parameters and ratios useful in HT simple shear zones |
title_fullStr |
Kinematic interpretation of shearband boudins : new parameters and ratios useful in HT simple shear zones |
title_full_unstemmed |
Kinematic interpretation of shearband boudins : new parameters and ratios useful in HT simple shear zones |
title_sort |
Kinematic interpretation of shearband boudins : new parameters and ratios useful in HT simple shear zones |
author |
Pamplona, J. |
author_facet |
Pamplona, J. Rodrigues, Benedito C. |
author_role |
author |
author2 |
Rodrigues, Benedito C. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Pamplona, J. Rodrigues, Benedito C. |
dc.subject.por.fl_str_mv |
Shearband boudin Geometric parameters HT simple shear zone kinematics Science & Technology |
topic |
Shearband boudin Geometric parameters HT simple shear zone kinematics Science & Technology |
description |
Shearband boudins (asymmetric boudins showing slip along the inter-boudin surface, which is synthetic with respect to the bulk shear sense) are ubiquitous and well-exposed in HT simple shear zones. The present work aims to extend the methodology of analysis of shearband boudins developed by Goscombe and Passchier (2003). Such shearband boudins represent complex objects that require an adequate methodology for unambiguous kinematic interpretation. We propose new geometric parameters (Bbs, B-t, c’, D’, d, ψ’) in order to describe and identify, with confidence, the kinematics of boudinage in this particular geological framework. The key-observation for kinematic interpretation in simple shear regimes is the boudin axis (Lb) that is commonly present, excluding the necessity to identify the regional stretching lineation (Lx) in the metasedimentary matrix. In monoclinic HT simple shear zones, this approach involves the use of a local displacement plane (Sx), which is always normal to the boudin axis (Lb). |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-01 2011-01-01T00:00:00Z |
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 |
http://hdl.handle.net/1822/11629 |
url |
http://hdl.handle.net/1822/11629 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
“Journal of Structural Geology”. ISSN 0191-8141 33:1 (Jan. 20111) 38-50. 0191-8141 10.1016/j.jsg.2010.10.004 |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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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1799132921797279744 |