A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models
Autor(a) principal: | |
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Data de Publicação: | 2016 |
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/10174/19463 |
Resumo: | In the Iberian Variscides several first order arcuate structures have been considered. In spite of being highly studied their characterization, formation mechanisms and even existence is still debatable. Themain Ibero-Armorican Arc (IAA) is essentially defined by a predominantNW–SE trend in the Iberian branch and an E–Wtrend in the Brittany one. However, in northern Spain it presents a 180° rotation, sometimes known as the Cantabrian Arc (CA). The relation between both arcs is controversial, being considered either as a single arc due to one tectonic event, or as the result of a polyphasic process. According to the last assumption, there is a later arcuate structure (CA), overlapping a previousmajor one (IAA). Whatever themodels, they must be able to explain the presence of a Variscan sinistral transpression in Iberia and a dextral one in Armorica, and a deformation spanning from the Devonian to the Upper Carboniferous. Another arcuate structure, in continuity with the CA, the Central-Iberian Arc (CIA) was recently proposed mainly based upon on magnetic anomalies, geometry of major folds and Ordovician paleocurrents. The critical review of the structural, stratigraphic and geophysical data supports both the IAA and the CA, but as independent structures. However, the presence of a CIA is highly questionable and could not be supported. The complex strain pattern of the IAA and the CA could be explained by a Devonian — Carboniferous polyphasic indentation of a Gondwana promontory. In thismodel the CA is essentially a thin-skinned arc,while the IAA has a more complex and longer evolution that has led to a thick-skinned first order structure. Nevertheless, both arcs are essentially the result of a lithospheric bending process during the Iberian Variscides. |
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A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical ModelsOroclinesIbero-Armorican ArcCantabrian ArcVariscan IberiaCentral Iberian ZoneIn the Iberian Variscides several first order arcuate structures have been considered. In spite of being highly studied their characterization, formation mechanisms and even existence is still debatable. Themain Ibero-Armorican Arc (IAA) is essentially defined by a predominantNW–SE trend in the Iberian branch and an E–Wtrend in the Brittany one. However, in northern Spain it presents a 180° rotation, sometimes known as the Cantabrian Arc (CA). The relation between both arcs is controversial, being considered either as a single arc due to one tectonic event, or as the result of a polyphasic process. According to the last assumption, there is a later arcuate structure (CA), overlapping a previousmajor one (IAA). Whatever themodels, they must be able to explain the presence of a Variscan sinistral transpression in Iberia and a dextral one in Armorica, and a deformation spanning from the Devonian to the Upper Carboniferous. Another arcuate structure, in continuity with the CA, the Central-Iberian Arc (CIA) was recently proposed mainly based upon on magnetic anomalies, geometry of major folds and Ordovician paleocurrents. The critical review of the structural, stratigraphic and geophysical data supports both the IAA and the CA, but as independent structures. However, the presence of a CIA is highly questionable and could not be supported. The complex strain pattern of the IAA and the CA could be explained by a Devonian — Carboniferous polyphasic indentation of a Gondwana promontory. In thismodel the CA is essentially a thin-skinned arc,while the IAA has a more complex and longer evolution that has led to a thick-skinned first order structure. Nevertheless, both arcs are essentially the result of a lithospheric bending process during the Iberian Variscides.Tectonophysics2016-12-30T17:17:03Z2016-12-302016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/19463http://hdl.handle.net/10174/19463engDIAS, R., RIBEIRO, A., ROMÃO, J., COKE, C., MOREIRA, N. (2016) - A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models. Tectonophysics, 681 170-194.rdias@uevora.ptaribeiro@fc.ul.ptmanuel.romao@lneg.ptccoke@sapo.ptnmoreira@estremoz.cienciaviva.pt250doi: 10.1016/j.tecto.2016.04.011Dias, RuiRibeiro, AntónioRomão, JoséCoke, CarlosMoreira, Noelinfo: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:RCAAP2024-01-03T19:08:16Zoai:dspace.uevora.pt:10174/19463Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:11:01.072414Repositório 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 |
A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models |
title |
A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models |
spellingShingle |
A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models Dias, Rui Oroclines Ibero-Armorican Arc Cantabrian Arc Variscan Iberia Central Iberian Zone |
title_short |
A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models |
title_full |
A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models |
title_fullStr |
A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models |
title_full_unstemmed |
A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models |
title_sort |
A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models |
author |
Dias, Rui |
author_facet |
Dias, Rui Ribeiro, António Romão, José Coke, Carlos Moreira, Noel |
author_role |
author |
author2 |
Ribeiro, António Romão, José Coke, Carlos Moreira, Noel |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Dias, Rui Ribeiro, António Romão, José Coke, Carlos Moreira, Noel |
dc.subject.por.fl_str_mv |
Oroclines Ibero-Armorican Arc Cantabrian Arc Variscan Iberia Central Iberian Zone |
topic |
Oroclines Ibero-Armorican Arc Cantabrian Arc Variscan Iberia Central Iberian Zone |
description |
In the Iberian Variscides several first order arcuate structures have been considered. In spite of being highly studied their characterization, formation mechanisms and even existence is still debatable. Themain Ibero-Armorican Arc (IAA) is essentially defined by a predominantNW–SE trend in the Iberian branch and an E–Wtrend in the Brittany one. However, in northern Spain it presents a 180° rotation, sometimes known as the Cantabrian Arc (CA). The relation between both arcs is controversial, being considered either as a single arc due to one tectonic event, or as the result of a polyphasic process. According to the last assumption, there is a later arcuate structure (CA), overlapping a previousmajor one (IAA). Whatever themodels, they must be able to explain the presence of a Variscan sinistral transpression in Iberia and a dextral one in Armorica, and a deformation spanning from the Devonian to the Upper Carboniferous. Another arcuate structure, in continuity with the CA, the Central-Iberian Arc (CIA) was recently proposed mainly based upon on magnetic anomalies, geometry of major folds and Ordovician paleocurrents. The critical review of the structural, stratigraphic and geophysical data supports both the IAA and the CA, but as independent structures. However, the presence of a CIA is highly questionable and could not be supported. The complex strain pattern of the IAA and the CA could be explained by a Devonian — Carboniferous polyphasic indentation of a Gondwana promontory. In thismodel the CA is essentially a thin-skinned arc,while the IAA has a more complex and longer evolution that has led to a thick-skinned first order structure. Nevertheless, both arcs are essentially the result of a lithospheric bending process during the Iberian Variscides. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12-30T17:17:03Z 2016-12-30 2016-01-01T00:00:00Z |
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/10174/19463 http://hdl.handle.net/10174/19463 |
url |
http://hdl.handle.net/10174/19463 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
DIAS, R., RIBEIRO, A., ROMÃO, J., COKE, C., MOREIRA, N. (2016) - A Review of the Arcuate Structures in the Iberian Variscides; Constraints and Genetical Models. Tectonophysics, 681 170-194. rdias@uevora.pt aribeiro@fc.ul.pt manuel.romao@lneg.pt ccoke@sapo.pt nmoreira@estremoz.cienciaviva.pt 250 doi: 10.1016/j.tecto.2016.04.011 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Tectonophysics |
publisher.none.fl_str_mv |
Tectonophysics |
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 |
instacron_str |
RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
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 |
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