Quaternary tectonics along oblique deformation zones in the Central Andean retro-wedge between 31°30'S and 35°S

The distribution of the Quaternary deformation in the outer retro-wedge of the Andes (31°30'-35°S) is controlled by the subduction geometry, the position of the structural front, and the location of oblique pre-Cenozoic mechanical anisotropies. In the Southern Precordillera, Quaternary structur...

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Autores principales: Cortés, J.M., Terrizzano, C.M., Pasini, M.M., Yamin, M.G., Casa, A.L.
Formato: SER
Materias:
Cenozoic
deformation
intermontane basin
radiocarbon dating
subduction
subsidence
tectonic evolution
tectonic setting
uplift
Argentina
Cuyo Basin
Precordillera
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p267_Cortes
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03058719_v399_n_p267_Cortes
record_format dspace
spelling todo:paper_03058719_v399_n_p267_Cortes2023-10-03T15:22:05Z Quaternary tectonics along oblique deformation zones in the Central Andean retro-wedge between 31°30'S and 35°S Cortés, J.M. Terrizzano, C.M. Pasini, M.M. Yamin, M.G. Casa, A.L. Cenozoic deformation intermontane basin radiocarbon dating subduction subsidence tectonic evolution tectonic setting uplift Argentina Cuyo Basin Precordillera The distribution of the Quaternary deformation in the outer retro-wedge of the Andes (31°30'-35°S) is controlled by the subduction geometry, the position of the structural front, and the location of oblique pre-Cenozoic mechanical anisotropies. In the Southern Precordillera, Quaternary structures tend to group along the Barreal-Las Peñas deformation zone with a NW to NNW trend. This Cenozoic belt (31°30'-32°40'S) developed on the northern segment of the Triassic Cuyo Basin and broadened laterally during the Quaternary. New radiocarbon ages on dam deposits confirm Holocene tectonic activity on the northwestern edge. The oldest ages of dam deposits are 5810±90 a BP (Cabeceras Creek) and 810±50 a BP (Dolores Creek). Palaeoseismological and seismic data suggest active tectonic growth on the NW and SE extremes. Quaternary tectonics has contributed to modifying the relief along this oblique belt. This contribution is evident from the tectonic uplift of blocks (minimum 90-120 m in the Barreal block), the initial development of intermontane basins (Pampa de los Burros Basin), the Quaternary rejuvenation of tectonic depressions (at least 32-37 m of tectonic subsidence in the Vizcacheras half-graben) and the incipient development of low-relief morphotectonic units by soft-linkage of Quaternary structures. © 2015 The Geological Society of London. Fil:Cortés, J.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Terrizzano, C.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pasini, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Yamin, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Casa, A.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. SER info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p267_Cortes
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cenozoic
deformation
intermontane basin
radiocarbon dating
subduction
subsidence
tectonic evolution
tectonic setting
uplift
Argentina
Cuyo Basin
Precordillera
spellingShingle Cenozoic
deformation
intermontane basin
radiocarbon dating
subduction
subsidence
tectonic evolution
tectonic setting
uplift
Argentina
Cuyo Basin
Precordillera
Cortés, J.M.
Terrizzano, C.M.
Pasini, M.M.
Yamin, M.G.
Casa, A.L.
Quaternary tectonics along oblique deformation zones in the Central Andean retro-wedge between 31°30'S and 35°S
topic_facet Cenozoic
deformation
intermontane basin
radiocarbon dating
subduction
subsidence
tectonic evolution
tectonic setting
uplift
Argentina
Cuyo Basin
Precordillera
description The distribution of the Quaternary deformation in the outer retro-wedge of the Andes (31°30'-35°S) is controlled by the subduction geometry, the position of the structural front, and the location of oblique pre-Cenozoic mechanical anisotropies. In the Southern Precordillera, Quaternary structures tend to group along the Barreal-Las Peñas deformation zone with a NW to NNW trend. This Cenozoic belt (31°30'-32°40'S) developed on the northern segment of the Triassic Cuyo Basin and broadened laterally during the Quaternary. New radiocarbon ages on dam deposits confirm Holocene tectonic activity on the northwestern edge. The oldest ages of dam deposits are 5810±90 a BP (Cabeceras Creek) and 810±50 a BP (Dolores Creek). Palaeoseismological and seismic data suggest active tectonic growth on the NW and SE extremes. Quaternary tectonics has contributed to modifying the relief along this oblique belt. This contribution is evident from the tectonic uplift of blocks (minimum 90-120 m in the Barreal block), the initial development of intermontane basins (Pampa de los Burros Basin), the Quaternary rejuvenation of tectonic depressions (at least 32-37 m of tectonic subsidence in the Vizcacheras half-graben) and the incipient development of low-relief morphotectonic units by soft-linkage of Quaternary structures. © 2015 The Geological Society of London.
format SER
author Cortés, J.M.
Terrizzano, C.M.
Pasini, M.M.
Yamin, M.G.
Casa, A.L.
author_facet Cortés, J.M.
Terrizzano, C.M.
Pasini, M.M.
Yamin, M.G.
Casa, A.L.
author_sort Cortés, J.M.
title Quaternary tectonics along oblique deformation zones in the Central Andean retro-wedge between 31°30'S and 35°S
title_short Quaternary tectonics along oblique deformation zones in the Central Andean retro-wedge between 31°30'S and 35°S
title_full Quaternary tectonics along oblique deformation zones in the Central Andean retro-wedge between 31°30'S and 35°S
title_fullStr Quaternary tectonics along oblique deformation zones in the Central Andean retro-wedge between 31°30'S and 35°S
title_full_unstemmed Quaternary tectonics along oblique deformation zones in the Central Andean retro-wedge between 31°30'S and 35°S
title_sort quaternary tectonics along oblique deformation zones in the central andean retro-wedge between 31°30's and 35°s
url http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p267_Cortes
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AT pasinimm quaternarytectonicsalongobliquedeformationzonesinthecentralandeanretrowedgebetween3130sand35s
AT yaminmg quaternarytectonicsalongobliquedeformationzonesinthecentralandeanretrowedgebetween3130sand35s
AT casaal quaternarytectonicsalongobliquedeformationzonesinthecentralandeanretrowedgebetween3130sand35s
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