Quantifying deformation processes in the SE Pyrenees using U–Pb dating of fracture-filling calcites

It is difficult to quantify the timing of the deformation processes in brittle fold–thrust belts because minerals suitable for dating and well-preserved growth strata sediments are scarce or absent. Here, we quantify the duration of thrust sheet emplacement and shortening rates in the SE Pyrenean th...

ver descrição completa

Detalhes bibliográficos
Autores: Cruset, David, Vergés Masip, Jaume, Albert, Richard, Gerdes, A., Benedicto, Antonio, Cantarero, Irene, Travé, A.
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/223722
Acesso em linha:http://hdl.handle.net/10261/223722
Access Level:acceso abierto
Palavra-chave:SE Pyrenean fold and thrust belt
Deformation
U-Pb calcite geochronology
id ES_e2fccfdea94d9b5ad9c86d0ec6c5c760
oai_identifier_str oai:digital.csic.es:10261/223722
network_acronym_str ES
network_name_str España
repository_id_str
spelling Quantifying deformation processes in the SE Pyrenees using U–Pb dating of fracture-filling calcitesCruset, DavidVergés Masip, JaumeAlbert, RichardGerdes, A.Benedicto, AntonioCantarero, IreneTravé, A.SE Pyrenean fold and thrust beltDeformationU-Pb calcite geochronologyIt is difficult to quantify the timing of the deformation processes in brittle fold–thrust belts because minerals suitable for dating and well-preserved growth strata sediments are scarce or absent. Here, we quantify the duration of thrust sheet emplacement and shortening rates in the SE Pyrenean thrust sequence using U–Pb dating of fracture-filling calcites. The obtained U–Pb dates reveal a minimum duration for the emplacement of each thrust unit (18.7 Ma for the Bóixols–Upper Pedraforca, 11.6 Ma for the Lower Pedraforca and 14.3 Ma for the Cadí thrust sheets) and show that piggy-back thrusting was accompanied by post-emplacement deformation of the upper thrust sheets above the lower sheets during their south-directed tectonic transport. We calculated shortening rates of 0.6, 3.1 and 1.1 mm a−1 from the older to younger emplaced thrust sheets. Our results also reveal the formation of local normal faults during the late Oligocene as a result of the late stages of compression and exhumation in the SE Pyrenees. We observed that temperatures >110 °C could be a limiting factor when applying the U–Pb dating method.This is FIERCE contribution No. 48. We thank Nick Roberts, Guilhem Hoareau and Editor Randall Parrish for their constructive comments, which improved the quality of this paper. We thank Katherine Mottram, Elena Druget and Chris Clark for geological discussions of a previous version of the paper.Peer reviewedGeological Society of LondonVergés, Jaume [0000-0002-4467-5291]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/223722reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1144/jgs2020-014Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2237222026-05-22T06:33:51Z
dc.title.none.fl_str_mv Quantifying deformation processes in the SE Pyrenees using U–Pb dating of fracture-filling calcites
title Quantifying deformation processes in the SE Pyrenees using U–Pb dating of fracture-filling calcites
spellingShingle Quantifying deformation processes in the SE Pyrenees using U–Pb dating of fracture-filling calcites
Cruset, David
SE Pyrenean fold and thrust belt
Deformation
U-Pb calcite geochronology
title_short Quantifying deformation processes in the SE Pyrenees using U–Pb dating of fracture-filling calcites
title_full Quantifying deformation processes in the SE Pyrenees using U–Pb dating of fracture-filling calcites
title_fullStr Quantifying deformation processes in the SE Pyrenees using U–Pb dating of fracture-filling calcites
title_full_unstemmed Quantifying deformation processes in the SE Pyrenees using U–Pb dating of fracture-filling calcites
title_sort Quantifying deformation processes in the SE Pyrenees using U–Pb dating of fracture-filling calcites
dc.creator.none.fl_str_mv Cruset, David
Vergés Masip, Jaume
Albert, Richard
Gerdes, A.
Benedicto, Antonio
Cantarero, Irene
Travé, A.
author Cruset, David
author_facet Cruset, David
Vergés Masip, Jaume
Albert, Richard
Gerdes, A.
Benedicto, Antonio
Cantarero, Irene
Travé, A.
author_role author
author2 Vergés Masip, Jaume
Albert, Richard
Gerdes, A.
Benedicto, Antonio
Cantarero, Irene
Travé, A.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Vergés, Jaume [0000-0002-4467-5291]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv SE Pyrenean fold and thrust belt
Deformation
U-Pb calcite geochronology
topic SE Pyrenean fold and thrust belt
Deformation
U-Pb calcite geochronology
description It is difficult to quantify the timing of the deformation processes in brittle fold–thrust belts because minerals suitable for dating and well-preserved growth strata sediments are scarce or absent. Here, we quantify the duration of thrust sheet emplacement and shortening rates in the SE Pyrenean thrust sequence using U–Pb dating of fracture-filling calcites. The obtained U–Pb dates reveal a minimum duration for the emplacement of each thrust unit (18.7 Ma for the Bóixols–Upper Pedraforca, 11.6 Ma for the Lower Pedraforca and 14.3 Ma for the Cadí thrust sheets) and show that piggy-back thrusting was accompanied by post-emplacement deformation of the upper thrust sheets above the lower sheets during their south-directed tectonic transport. We calculated shortening rates of 0.6, 3.1 and 1.1 mm a−1 from the older to younger emplaced thrust sheets. Our results also reveal the formation of local normal faults during the late Oligocene as a result of the late stages of compression and exhumation in the SE Pyrenees. We observed that temperatures >110 °C could be a limiting factor when applying the U–Pb dating method.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/223722
url http://hdl.handle.net/10261/223722
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1144/jgs2020-014
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Geological Society of London
publisher.none.fl_str_mv Geological Society of London
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869422460568338432
score 15,812455

Registos relacionados