U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics

Detalhes bibliográficos
Autor(a) principal: Martínez Catalán, José R.
Data de Publicação: 2008
Outros Autores: Fernández-Suárez, Javier, Pinto de Meireles, Carlos Augusto, González-Clavijo, Emilio J., Belousova, Elena, Saeed, Ayesha
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.9/390
Resumo: Detrital zircons from Devonian and Carboniferous synorogenic flysch deposits occurring in an imbricate stack have been dated by laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) to: (1) obtain a maximum depositional age to constrain the maximum age limit for thrusting of exotic terranes in the NW Iberian Massif; (2) correlate the zircon age populations with published ages in nearby units to establish their possible source areas. The maximum depositional ages are Late Devonian for rocks high in the structural nappe pile (Gimonde Formation), in accordance with palynomorph dating, and around the Devonian–Carboniferous boundary for structurally lower samples (San Vitero Formation). Used in conjunction with previously published ages, the new ages are interpreted in terms of the advance of the thrust system responsible for the emplacement of exotic terranes upon the Iberian autochthon during the Variscan collision. Early Variscan zircon population ages indicate the exotic terranes as the source of synorogenic sediments, whereas their scarcity suggests derivation from the Iberian autochthon. One of the samples analysed lacks Variscan detrital zircons; this feature, together with the absence of an Early Palaeozoic zircon age population, puts into question its synorogenic character and suggests that the sample may be representative of the preorogenic parautochthon.
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spelling U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonicsDetrital zircons from Devonian and Carboniferous synorogenic flysch deposits occurring in an imbricate stack have been dated by laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) to: (1) obtain a maximum depositional age to constrain the maximum age limit for thrusting of exotic terranes in the NW Iberian Massif; (2) correlate the zircon age populations with published ages in nearby units to establish their possible source areas. The maximum depositional ages are Late Devonian for rocks high in the structural nappe pile (Gimonde Formation), in accordance with palynomorph dating, and around the Devonian–Carboniferous boundary for structurally lower samples (San Vitero Formation). Used in conjunction with previously published ages, the new ages are interpreted in terms of the advance of the thrust system responsible for the emplacement of exotic terranes upon the Iberian autochthon during the Variscan collision. Early Variscan zircon population ages indicate the exotic terranes as the source of synorogenic sediments, whereas their scarcity suggests derivation from the Iberian autochthon. One of the samples analysed lacks Variscan detrital zircons; this feature, together with the absence of an Early Palaeozoic zircon age population, puts into question its synorogenic character and suggests that the sample may be representative of the preorogenic parautochthon.Repositório do LNEGMartínez Catalán, José R.Fernández-Suárez, JavierPinto de Meireles, Carlos AugustoGonzález-Clavijo, Emilio J.Belousova, ElenaSaeed, Ayesha2009-11-13T17:55:16Z2008-01-01T00:00:00Z2008-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/390engMartínez Catalán, José R. [et al.]. U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics. Journal of the Geological Society, London, vol. 165, 2008.info: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:RCAAP2022-09-06T12:24:33Zoai:repositorio.lneg.pt:10400.9/390Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:33:21.093905Repositório 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 U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics
title U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics
spellingShingle U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics
Martínez Catalán, José R.
title_short U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics
title_full U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics
title_fullStr U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics
title_full_unstemmed U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics
title_sort U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics
author Martínez Catalán, José R.
author_facet Martínez Catalán, José R.
Fernández-Suárez, Javier
Pinto de Meireles, Carlos Augusto
González-Clavijo, Emilio J.
Belousova, Elena
Saeed, Ayesha
author_role author
author2 Fernández-Suárez, Javier
Pinto de Meireles, Carlos Augusto
González-Clavijo, Emilio J.
Belousova, Elena
Saeed, Ayesha
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório do LNEG
dc.contributor.author.fl_str_mv Martínez Catalán, José R.
Fernández-Suárez, Javier
Pinto de Meireles, Carlos Augusto
González-Clavijo, Emilio J.
Belousova, Elena
Saeed, Ayesha
description Detrital zircons from Devonian and Carboniferous synorogenic flysch deposits occurring in an imbricate stack have been dated by laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) to: (1) obtain a maximum depositional age to constrain the maximum age limit for thrusting of exotic terranes in the NW Iberian Massif; (2) correlate the zircon age populations with published ages in nearby units to establish their possible source areas. The maximum depositional ages are Late Devonian for rocks high in the structural nappe pile (Gimonde Formation), in accordance with palynomorph dating, and around the Devonian–Carboniferous boundary for structurally lower samples (San Vitero Formation). Used in conjunction with previously published ages, the new ages are interpreted in terms of the advance of the thrust system responsible for the emplacement of exotic terranes upon the Iberian autochthon during the Variscan collision. Early Variscan zircon population ages indicate the exotic terranes as the source of synorogenic sediments, whereas their scarcity suggests derivation from the Iberian autochthon. One of the samples analysed lacks Variscan detrital zircons; this feature, together with the absence of an Early Palaeozoic zircon age population, puts into question its synorogenic character and suggests that the sample may be representative of the preorogenic parautochthon.
publishDate 2008
dc.date.none.fl_str_mv 2008-01-01T00:00:00Z
2008-01-01T00:00:00Z
2009-11-13T17:55:16Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.9/390
url http://hdl.handle.net/10400.9/390
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Martínez Catalán, José R. [et al.]. U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif, Variscan belt : interplay of Devonian-arboniferous sedimentation and thrust tectonics. Journal of the Geological Society, London, vol. 165, 2008.
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.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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