Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean front

Dating the sedimentary infill of the northern margin of the Ebro foreland basin informs about the orogen-basin evolution. A magnetostratigraphic section of ~5 km-thick combines new magnetostratigraphic results from the syntectonic alluvial Uncastillo Fm (Upper Oligocene-Lower Miocene, 1 km-thick, th...

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Autores: Oliva-Urcia, B., Beamud, E., Arenas, C., Pueyo, E.L., Garcés, M., Soto, R., Valero, L., Pérez-Rivarés, F.J.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:118051
Acceso en línea:http://zaguan.unizar.es/record/118051
Access Level:acceso abierto
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spelling Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean frontOliva-Urcia, B.Beamud, E.Arenas, C.Pueyo, E.L.Garcés, M.Soto, R.Valero, L.Pérez-Rivarés, F.J.Dating the sedimentary infill of the northern margin of the Ebro foreland basin informs about the orogen-basin evolution. A magnetostratigraphic section of ~5 km-thick combines new magnetostratigraphic results from the syntectonic alluvial Uncastillo Fm (Upper Oligocene-Lower Miocene, 1 km-thick, the Fuencalderas section) with previous (3.3 km-thick) and new (0.7 km-thick) magnetostratigraphic data from the underlying fluvial Campodarbe Fm (Luesia and San Marzal sections, Eocene-Oligocene). This composite section allows dating the entire basin infill in this sector, therefore bracketing the timing of the deformation in the southern margin of the Pyrenees after considering previous kinematic studies. Deformation recorded by the continental deposits spans from syn-Gavarnie nappe activity (Broto and Fiscal basement thrust sheets) from 31.3 to 24.55 Ma, Rupelian-Chattian (Oligocene) to the syn-Guarga thrust activity, from 24.55 to 21.2 Ma Chattian-Aquitanian (Oligocene-Miocene). The Accumulation rates vary from ca. 22 to ca. 39 cm/kyr between the genetic stratigraphic units in the Uncastillo Fm through the section. These rates are close to those of the underlying deposits of the Campodarbe Fm (average of ca. 36 cm/kyr). Deformation for the latest Pyrenean front (syn-Guarga thrust) is younger than previously assigned in ~5.4. ~1.5 and ~1.1 Myr of the beginning of the Punta Común thrust sheet (from 29.4 Ma to 24 Ma), Lower Riglos thrust sheet system (from 24 to 22.5 Ma) and the Upper Riglos thrust system (22.5 to 21.4 Ma) respectively. Other significant changes in accumulation rate and its derivative also indicate variations in the tectonic activity ca. 33 and 28 Ma. © 2019 Elsevier B.V.2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://zaguan.unizar.es/record/118051reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/DGA/E32-17Rinfo:eu-repo/grantAgreement/ES/MINECO/CGL2014-54118-C2-2-Rinfo:eu-repo/grantAgreement/ES/MINECO/CGL2014-55900-Pinfo:eu-repo/semantics/openAccessoai:zaguan.unizar.es:1180512026-05-29T13:59:51Z
dc.title.none.fl_str_mv Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean front
title Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean front
spellingShingle Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean front
Oliva-Urcia, B.
title_short Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean front
title_full Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean front
title_fullStr Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean front
title_full_unstemmed Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean front
title_sort Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean front
dc.creator.none.fl_str_mv Oliva-Urcia, B.
Beamud, E.
Arenas, C.
Pueyo, E.L.
Garcés, M.
Soto, R.
Valero, L.
Pérez-Rivarés, F.J.
author Oliva-Urcia, B.
author_facet Oliva-Urcia, B.
Beamud, E.
Arenas, C.
Pueyo, E.L.
Garcés, M.
Soto, R.
Valero, L.
Pérez-Rivarés, F.J.
author_role author
author2 Beamud, E.
Arenas, C.
Pueyo, E.L.
Garcés, M.
Soto, R.
Valero, L.
Pérez-Rivarés, F.J.
author2_role author
author
author
author
author
author
author
description Dating the sedimentary infill of the northern margin of the Ebro foreland basin informs about the orogen-basin evolution. A magnetostratigraphic section of ~5 km-thick combines new magnetostratigraphic results from the syntectonic alluvial Uncastillo Fm (Upper Oligocene-Lower Miocene, 1 km-thick, the Fuencalderas section) with previous (3.3 km-thick) and new (0.7 km-thick) magnetostratigraphic data from the underlying fluvial Campodarbe Fm (Luesia and San Marzal sections, Eocene-Oligocene). This composite section allows dating the entire basin infill in this sector, therefore bracketing the timing of the deformation in the southern margin of the Pyrenees after considering previous kinematic studies. Deformation recorded by the continental deposits spans from syn-Gavarnie nappe activity (Broto and Fiscal basement thrust sheets) from 31.3 to 24.55 Ma, Rupelian-Chattian (Oligocene) to the syn-Guarga thrust activity, from 24.55 to 21.2 Ma Chattian-Aquitanian (Oligocene-Miocene). The Accumulation rates vary from ca. 22 to ca. 39 cm/kyr between the genetic stratigraphic units in the Uncastillo Fm through the section. These rates are close to those of the underlying deposits of the Campodarbe Fm (average of ca. 36 cm/kyr). Deformation for the latest Pyrenean front (syn-Guarga thrust) is younger than previously assigned in ~5.4. ~1.5 and ~1.1 Myr of the beginning of the Punta Común thrust sheet (from 29.4 Ma to 24 Ma), Lower Riglos thrust sheet system (from 24 to 22.5 Ma) and the Upper Riglos thrust system (22.5 to 21.4 Ma) respectively. Other significant changes in accumulation rate and its derivative also indicate variations in the tectonic activity ca. 33 and 28 Ma. © 2019 Elsevier B.V.
publishDate 2019
dc.date.none.fl_str_mv 2019
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dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/118051
url http://zaguan.unizar.es/record/118051
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/DGA/E32-17R
info:eu-repo/grantAgreement/ES/MINECO/CGL2014-54118-C2-2-R
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dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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