Influence of Syntectonic sedimentation and décollement rheology on the geometry and evolution of orogenic wedges: analog modelling of the Kuqa Fold-and-thrust belt (NW China)

Contractional deformation in the outer parts of fold‐and‐thrust belts is in part controlled by the presence of syntectonic sediments and multiple décollements (e.g., the Apennines, the Appalachians, the Pyrenees, the Zagros, or the Sub‐Andean and Kuqa fold‐and‐thrust belts). To better understand the...

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Autores: Pla de Casacuberta, Oriol, Roca i Abella, Eduard, Xie, Huiwen, Izquierdo-Llavall, Esther, Muñoz, Josep Anton, Rowan, Mark G., Ferrer García, J. Oriol (José Oriol), Gratacós Torrà, Òscar, Yuan, Neng, Huang, Shaoying
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/161267
Acceso en línea:https://hdl.handle.net/2445/161267
Access Level:acceso abierto
Palabra clave:Sedimentació
Tectònica
Sedimentation and deposition
Tectonics
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spelling Influence of Syntectonic sedimentation and décollement rheology on the geometry and evolution of orogenic wedges: analog modelling of the Kuqa Fold-and-thrust belt (NW China)Pla de Casacuberta, OriolRoca i Abella, EduardXie, HuiwenIzquierdo-Llavall, EstherMuñoz, Josep AntonRowan, Mark G.Ferrer García, J. Oriol (José Oriol)Gratacós Torrà, ÒscarYuan, NengHuang, ShaoyingSedimentacióTectònicaSedimentation and depositionTectonicsContractional deformation in the outer parts of fold‐and‐thrust belts is in part controlled by the presence of syntectonic sediments and multiple décollements (e.g., the Apennines, the Appalachians, the Pyrenees, the Zagros, or the Sub‐Andean and Kuqa fold‐and‐thrust belts). To better understand the influence of these parameters in the kinematic evolution of fold‐and‐thrust systems, we carried out an experimental study including four 3‐D sandbox models inspired by one of the previously mentioned prototypes, the Kuqa fold‐and‐thrust belt. This belt contains two décollements: a weak synorogenic salt layer and a deeper, preorogenic, and frictionless décollement (i.e., organic‐rich shales) showing along strike variations of rheology. The experimental results show that increasing synkinematic sedimentation rate (i) generates a progressive change from distributed to localized deformation and (ii) delays the development of frontal contractional structures detached on the salt, favoring the formation and reactivation of more hinterland thrusts and backthrusts. With respect to the rheology, our study reveals that as the viscosity of the prekinematic décollement increases, (i) the deformation propagates more slowly toward the foreland, and (ii) the underlying thrust stack becomes broader and lower and has a gentler thrust taper angle. The rheology of the prekinematic décollement defines the distribution and geometry of the structures detached on it that in turn influence the development of overlying, salt‐detached structures. Subsalt structures can (i) determine the areal extent of the salt and therefore of any fold‐and‐thrust system detached on it and (ii) hamper or even prevent the progressive foreland propagation of deformation above the salt.Wiley2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/161267Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1029/2018TC005386Tectonics, 2019, vol. 38, num. 8, p. 2727-2755https://doi.org/10.1029/2018TC005386(c) American Geophysical Union (AGU), 2019info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1612672026-05-27T06:46:51Z
dc.title.none.fl_str_mv Influence of Syntectonic sedimentation and décollement rheology on the geometry and evolution of orogenic wedges: analog modelling of the Kuqa Fold-and-thrust belt (NW China)
title Influence of Syntectonic sedimentation and décollement rheology on the geometry and evolution of orogenic wedges: analog modelling of the Kuqa Fold-and-thrust belt (NW China)
spellingShingle Influence of Syntectonic sedimentation and décollement rheology on the geometry and evolution of orogenic wedges: analog modelling of the Kuqa Fold-and-thrust belt (NW China)
Pla de Casacuberta, Oriol
Sedimentació
Tectònica
Sedimentation and deposition
Tectonics
title_short Influence of Syntectonic sedimentation and décollement rheology on the geometry and evolution of orogenic wedges: analog modelling of the Kuqa Fold-and-thrust belt (NW China)
title_full Influence of Syntectonic sedimentation and décollement rheology on the geometry and evolution of orogenic wedges: analog modelling of the Kuqa Fold-and-thrust belt (NW China)
title_fullStr Influence of Syntectonic sedimentation and décollement rheology on the geometry and evolution of orogenic wedges: analog modelling of the Kuqa Fold-and-thrust belt (NW China)
title_full_unstemmed Influence of Syntectonic sedimentation and décollement rheology on the geometry and evolution of orogenic wedges: analog modelling of the Kuqa Fold-and-thrust belt (NW China)
title_sort Influence of Syntectonic sedimentation and décollement rheology on the geometry and evolution of orogenic wedges: analog modelling of the Kuqa Fold-and-thrust belt (NW China)
dc.creator.none.fl_str_mv Pla de Casacuberta, Oriol
Roca i Abella, Eduard
Xie, Huiwen
Izquierdo-Llavall, Esther
Muñoz, Josep Anton
Rowan, Mark G.
Ferrer García, J. Oriol (José Oriol)
Gratacós Torrà, Òscar
Yuan, Neng
Huang, Shaoying
author Pla de Casacuberta, Oriol
author_facet Pla de Casacuberta, Oriol
Roca i Abella, Eduard
Xie, Huiwen
Izquierdo-Llavall, Esther
Muñoz, Josep Anton
Rowan, Mark G.
Ferrer García, J. Oriol (José Oriol)
Gratacós Torrà, Òscar
Yuan, Neng
Huang, Shaoying
author_role author
author2 Roca i Abella, Eduard
Xie, Huiwen
Izquierdo-Llavall, Esther
Muñoz, Josep Anton
Rowan, Mark G.
Ferrer García, J. Oriol (José Oriol)
Gratacós Torrà, Òscar
Yuan, Neng
Huang, Shaoying
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Sedimentació
Tectònica
Sedimentation and deposition
Tectonics
topic Sedimentació
Tectònica
Sedimentation and deposition
Tectonics
description Contractional deformation in the outer parts of fold‐and‐thrust belts is in part controlled by the presence of syntectonic sediments and multiple décollements (e.g., the Apennines, the Appalachians, the Pyrenees, the Zagros, or the Sub‐Andean and Kuqa fold‐and‐thrust belts). To better understand the influence of these parameters in the kinematic evolution of fold‐and‐thrust systems, we carried out an experimental study including four 3‐D sandbox models inspired by one of the previously mentioned prototypes, the Kuqa fold‐and‐thrust belt. This belt contains two décollements: a weak synorogenic salt layer and a deeper, preorogenic, and frictionless décollement (i.e., organic‐rich shales) showing along strike variations of rheology. The experimental results show that increasing synkinematic sedimentation rate (i) generates a progressive change from distributed to localized deformation and (ii) delays the development of frontal contractional structures detached on the salt, favoring the formation and reactivation of more hinterland thrusts and backthrusts. With respect to the rheology, our study reveals that as the viscosity of the prekinematic décollement increases, (i) the deformation propagates more slowly toward the foreland, and (ii) the underlying thrust stack becomes broader and lower and has a gentler thrust taper angle. The rheology of the prekinematic décollement defines the distribution and geometry of the structures detached on it that in turn influence the development of overlying, salt‐detached structures. Subsalt structures can (i) determine the areal extent of the salt and therefore of any fold‐and‐thrust system detached on it and (ii) hamper or even prevent the progressive foreland propagation of deformation above the salt.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/161267
url https://hdl.handle.net/2445/161267
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1029/2018TC005386
Tectonics, 2019, vol. 38, num. 8, p. 2727-2755
https://doi.org/10.1029/2018TC005386
dc.rights.none.fl_str_mv (c) American Geophysical Union (AGU), 2019
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Geophysical Union (AGU), 2019
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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