Building and collapse of the Cadomian Orogen: A plate-scale model based on structural data from the SW Iberian Massif

The Cadomian Orogeny produced a subduction-related orogen along the periphery of Gondwana and configured the pre-Variscan basement of the Iberian Massif. The architecture of the Cadomian Orogen requires detailed structural analysis for reconstruction because of severe tectonic reworking during the P...

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Authors: Moreno Martín, Diana, Díez Fernández, Rubén, Arenas Martín, Ricardo, Rojo Pérez, Esther, Novo Fernández, Irene, Sánchez Martínez, Sonia
Format: article
Publication Date:2023
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/91570
Online Access:https://hdl.handle.net/20.500.14352/91570
Access Level:Open access
Keyword:551.24(460)
Geodinámica
2506.20 Geología Estructural
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spelling Building and collapse of the Cadomian Orogen: A plate-scale model based on structural data from the SW Iberian MassifMoreno Martín, DianaDíez Fernández, RubénArenas Martín, RicardoRojo Pérez, EstherNovo Fernández, IreneSánchez Martínez, Sonia551.24(460)Geodinámica2506.20 Geología EstructuralThe Cadomian Orogeny produced a subduction-related orogen along the periphery of Gondwana and configured the pre-Variscan basement of the Iberian Massif. The architecture of the Cadomian Orogen requires detailed structural analysis for reconstruction because of severe tectonic reworking during the Paleozoic (Variscan cycle). Tectonometamorphic analysis and data compilation in SW Iberia (La Serena Massif, Spain) have allowed the identification of three Cadomian deformation phases and further constrained the global architecture and large-scale processes that contributed to the Ediacaran building and early Paleozoic dismantling of the Cadomian Orogen. The first phase (DC1, prior to 573 Ma) favored tabular morphology in plutons that intruded during the building of a continental arc. The second phase (DC2, 573–535 Ma) produced an upright folding and contributed to further crustal thickening. The third phase of deformation (DC3, ranging between ∼535 and ∼480 Ma) resulted in an orogen-parallel dome with oblique extensional flow. DC1 represents the crustal growth and thickening stage. DC2 is synchronous with a period of crustal thickening that affected most of the Gondwanan periphery, from the most external sections (Cadomian fore-arc) to the inner ones (Cadomian back-arc). We explain DC2 as a consequence of flat subduction, which was followed by a period dominated by crustal extension (DC3) upon roll-back of the lower plate. The Ediacaran construction of the Cadomian Orogen (DC1 and DC2) requires ongoing subduction beneath Gondwana s.l., whereas its dismantlement during the Early Paleozoic is compatible with oblique, sinistral convergence.American Geophysical UnionUniversidad Complutense de Madrid20232023-01-0120232023-01-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/91570reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)InglésengPID2020-112489GB-C21 Not available Not availablePID2020-112489GB-C22 Not available Not availableMCIN AEI 10.13039open accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/915702026-06-02T12:44:21Z
dc.title.none.fl_str_mv Building and collapse of the Cadomian Orogen: A plate-scale model based on structural data from the SW Iberian Massif
title Building and collapse of the Cadomian Orogen: A plate-scale model based on structural data from the SW Iberian Massif
spellingShingle Building and collapse of the Cadomian Orogen: A plate-scale model based on structural data from the SW Iberian Massif
Moreno Martín, Diana
551.24(460)
Geodinámica
2506.20 Geología Estructural
title_short Building and collapse of the Cadomian Orogen: A plate-scale model based on structural data from the SW Iberian Massif
title_full Building and collapse of the Cadomian Orogen: A plate-scale model based on structural data from the SW Iberian Massif
title_fullStr Building and collapse of the Cadomian Orogen: A plate-scale model based on structural data from the SW Iberian Massif
title_full_unstemmed Building and collapse of the Cadomian Orogen: A plate-scale model based on structural data from the SW Iberian Massif
title_sort Building and collapse of the Cadomian Orogen: A plate-scale model based on structural data from the SW Iberian Massif
dc.creator.none.fl_str_mv Moreno Martín, Diana
Díez Fernández, Rubén
Arenas Martín, Ricardo
Rojo Pérez, Esther
Novo Fernández, Irene
Sánchez Martínez, Sonia
author Moreno Martín, Diana
author_facet Moreno Martín, Diana
Díez Fernández, Rubén
Arenas Martín, Ricardo
Rojo Pérez, Esther
Novo Fernández, Irene
Sánchez Martínez, Sonia
author_role author
author2 Díez Fernández, Rubén
Arenas Martín, Ricardo
Rojo Pérez, Esther
Novo Fernández, Irene
Sánchez Martínez, Sonia
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 551.24(460)
Geodinámica
2506.20 Geología Estructural
topic 551.24(460)
Geodinámica
2506.20 Geología Estructural
description The Cadomian Orogeny produced a subduction-related orogen along the periphery of Gondwana and configured the pre-Variscan basement of the Iberian Massif. The architecture of the Cadomian Orogen requires detailed structural analysis for reconstruction because of severe tectonic reworking during the Paleozoic (Variscan cycle). Tectonometamorphic analysis and data compilation in SW Iberia (La Serena Massif, Spain) have allowed the identification of three Cadomian deformation phases and further constrained the global architecture and large-scale processes that contributed to the Ediacaran building and early Paleozoic dismantling of the Cadomian Orogen. The first phase (DC1, prior to 573 Ma) favored tabular morphology in plutons that intruded during the building of a continental arc. The second phase (DC2, 573–535 Ma) produced an upright folding and contributed to further crustal thickening. The third phase of deformation (DC3, ranging between ∼535 and ∼480 Ma) resulted in an orogen-parallel dome with oblique extensional flow. DC1 represents the crustal growth and thickening stage. DC2 is synchronous with a period of crustal thickening that affected most of the Gondwanan periphery, from the most external sections (Cadomian fore-arc) to the inner ones (Cadomian back-arc). We explain DC2 as a consequence of flat subduction, which was followed by a period dominated by crustal extension (DC3) upon roll-back of the lower plate. The Ediacaran construction of the Cadomian Orogen (DC1 and DC2) requires ongoing subduction beneath Gondwana s.l., whereas its dismantlement during the Early Paleozoic is compatible with oblique, sinistral convergence.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-01-01
2023
2023-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/91570
url https://hdl.handle.net/20.500.14352/91570
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv PID2020-112489GB-C21 Not available Not available
PID2020-112489GB-C22 Not available Not available
MCIN AEI 10.13039
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869418295016292352
score 15,300719

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