Neogene structure of the andean precordillera, Argentina: Insights from analogue models

Analogue models combining different sets of preexisting structural weaknesses were developed to under- stand their evolution during regional ~ENE shortening. Strain analysis of simulations was performed with the GEODEF 1.1 software, a tool that allows to quantify deformation in plan view on the basi...

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Autores principales:	Oriolo, S., Cristallini, E.O., Japas, M.S., Yagupsky, D.L.
Formato:	JOUR
Materias:	Cross-strike structures Flat-slab subduction GEODEF software Inherited crustal fabrics Strain partitioning Transpression Andean orogeny deformation displacement Neogene reverse fault slip software strain analysis strain partitioning strike-slip fault subduction zone transpression Argentina
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_07187092_v42_n1_p20_Oriolo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_07187092_v42_n1_p20_Oriolo
record_format	dspace
spelling	todo:paper_07187092_v42_n1_p20_Oriolo2023-10-03T15:36:44Z Neogene structure of the andean precordillera, Argentina: Insights from analogue models Oriolo, S. Cristallini, E.O. Japas, M.S. Yagupsky, D.L. Cross-strike structures Flat-slab subduction GEODEF software Inherited crustal fabrics Strain partitioning Transpression Andean orogeny deformation displacement Neogene reverse fault slip software strain analysis strain partitioning strike-slip fault subduction zone transpression Argentina Analogue models combining different sets of preexisting structural weaknesses were developed to under- stand their evolution during regional ~ENE shortening. Strain analysis of simulations was performed with the GEODEF 1.1 software, a tool that allows to quantify deformation in plan view on the basis of displacement fields. Results showed up that regional NNE heterogeneities are reactivated as dextral reverse-slip structures, though NNE neoformed thrusts are also present. Likewise, dominant sinistral strike-slip motions have been obtained for reactivated second-order WNW structures whereas sinistral reverse-slip has been recorded for NW ones. Comparison of these results with structural, kinematic and paleomagnetic data supports partitioned dextral transpression for the northern Andean Precordillera since the Miocene. Moreover, models not only confirm sinistral strike-slip motions for WNW structures of the Precordillera but also suggest that they would represent preexisting crustal fabrics that were reactivated during the Andean orogeny. These cross-strike structures have played a significant role in the construction and evolution of the fold and thrust belt as they segmentate the activity of orogen-parallel structures. © 2015, Servicio Nacional de Geologia y Mineria. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07187092_v42_n1_p20_Oriolo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cross-strike structures Flat-slab subduction GEODEF software Inherited crustal fabrics Strain partitioning Transpression Andean orogeny deformation displacement Neogene reverse fault slip software strain analysis strain partitioning strike-slip fault subduction zone transpression Argentina
spellingShingle	Cross-strike structures Flat-slab subduction GEODEF software Inherited crustal fabrics Strain partitioning Transpression Andean orogeny deformation displacement Neogene reverse fault slip software strain analysis strain partitioning strike-slip fault subduction zone transpression Argentina Oriolo, S. Cristallini, E.O. Japas, M.S. Yagupsky, D.L. Neogene structure of the andean precordillera, Argentina: Insights from analogue models
topic_facet	Cross-strike structures Flat-slab subduction GEODEF software Inherited crustal fabrics Strain partitioning Transpression Andean orogeny deformation displacement Neogene reverse fault slip software strain analysis strain partitioning strike-slip fault subduction zone transpression Argentina
description	Analogue models combining different sets of preexisting structural weaknesses were developed to under- stand their evolution during regional ~ENE shortening. Strain analysis of simulations was performed with the GEODEF 1.1 software, a tool that allows to quantify deformation in plan view on the basis of displacement fields. Results showed up that regional NNE heterogeneities are reactivated as dextral reverse-slip structures, though NNE neoformed thrusts are also present. Likewise, dominant sinistral strike-slip motions have been obtained for reactivated second-order WNW structures whereas sinistral reverse-slip has been recorded for NW ones. Comparison of these results with structural, kinematic and paleomagnetic data supports partitioned dextral transpression for the northern Andean Precordillera since the Miocene. Moreover, models not only confirm sinistral strike-slip motions for WNW structures of the Precordillera but also suggest that they would represent preexisting crustal fabrics that were reactivated during the Andean orogeny. These cross-strike structures have played a significant role in the construction and evolution of the fold and thrust belt as they segmentate the activity of orogen-parallel structures. © 2015, Servicio Nacional de Geologia y Mineria. All rights reserved.
format	JOUR
author	Oriolo, S. Cristallini, E.O. Japas, M.S. Yagupsky, D.L.
author_facet	Oriolo, S. Cristallini, E.O. Japas, M.S. Yagupsky, D.L.
author_sort	Oriolo, S.
title	Neogene structure of the andean precordillera, Argentina: Insights from analogue models
title_short	Neogene structure of the andean precordillera, Argentina: Insights from analogue models
title_full	Neogene structure of the andean precordillera, Argentina: Insights from analogue models
title_fullStr	Neogene structure of the andean precordillera, Argentina: Insights from analogue models
title_full_unstemmed	Neogene structure of the andean precordillera, Argentina: Insights from analogue models
title_sort	neogene structure of the andean precordillera, argentina: insights from analogue models
url	http://hdl.handle.net/20.500.12110/paper_07187092_v42_n1_p20_Oriolo
work_keys_str_mv	AT oriolos neogenestructureoftheandeanprecordilleraargentinainsightsfromanaloguemodels AT cristallinieo neogenestructureoftheandeanprecordilleraargentinainsightsfromanaloguemodels AT japasms neogenestructureoftheandeanprecordilleraargentinainsightsfromanaloguemodels AT yagupskydl neogenestructureoftheandeanprecordilleraargentinainsightsfromanaloguemodels
_version_	1807315877639487488

Neogene structure of the andean precordillera, Argentina: Insights from analogue models

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