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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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v42_n1_p20_Oriolo http://hdl.handle.net/20.500.12110/paper_07187092_v42_n1_p20_Oriolo |
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paper:paper_07187092_v42_n1_p20_Oriolo2023-06-08T15:43:18Z Neogene structure of the andean precordillera, Argentina: Insights from analogue models 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. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v42_n1_p20_Oriolo 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 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. |
| 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 |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v42_n1_p20_Oriolo http://hdl.handle.net/20.500.12110/paper_07187092_v42_n1_p20_Oriolo |
| _version_ |
1768545377660698624 |