Neogene structure of the Andean Precordillera, Argentina: insights from analogue models

Analogue models combining different sets of preexisting structural weaknesses were developed to understand 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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Oriolo,Sebastián, Cristallini,Ernesto O, Japas,María S, Yagupsky,Daniel L
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2015
Materias:	Transpression Cross-strike structures Strain partitioning Inherited crustal fabrics Flat-slab subduction OEODEF software
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062015000100002
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-71062015000100002
record_format	dspace
spelling	oai:scielo:S0718-710620150001000022015-03-12Neogene structure of the Andean Precordillera, Argentina: insights from analogue modelsOriolo,SebastiánCristallini,Ernesto OJapas,María SYagupsky,Daniel L Transpression Cross-strike structures Strain partitioning Inherited crustal fabrics Flat-slab subduction OEODEF software Analogue models combining different sets of preexisting structural weaknesses were developed to understand 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.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.42 n.1 20152015-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062015000100002en10.5027/andgeoV42n1-a02
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Transpression Cross-strike structures Strain partitioning Inherited crustal fabrics Flat-slab subduction OEODEF software
spellingShingle	Transpression Cross-strike structures Strain partitioning Inherited crustal fabrics Flat-slab subduction OEODEF software Oriolo,Sebastián Cristallini,Ernesto O Japas,María S Yagupsky,Daniel L Neogene structure of the Andean Precordillera, Argentina: insights from analogue models
description	Analogue models combining different sets of preexisting structural weaknesses were developed to understand 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.
author	Oriolo,Sebastián Cristallini,Ernesto O Japas,María S Yagupsky,Daniel L
author_facet	Oriolo,Sebastián Cristallini,Ernesto O Japas,María S Yagupsky,Daniel L
author_sort	Oriolo,Sebastián
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
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062015000100002
work_keys_str_mv	AT oriolosebastian neogenestructureoftheandeanprecordilleraargentinainsightsfromanaloguemodels AT cristalliniernestoo neogenestructureoftheandeanprecordilleraargentinainsightsfromanaloguemodels AT japasmarias neogenestructureoftheandeanprecordilleraargentinainsightsfromanaloguemodels AT yagupskydaniell neogenestructureoftheandeanprecordilleraargentinainsightsfromanaloguemodels
_version_	1714205847699062784

Neogene structure of the Andean Precordillera, Argentina: insights from analogue models

Ejemplares similares