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:	Cortes, Jose Maria, Terrizzano, Carla Marina, Pasini, María Mercedes, Yamin, Marcela G., Casa, Analía Laura
Publicado:	2015
Materias:	Cenozoic deformation intermontane basin radiocarbon dating subduction subsidence tectonic evolution tectonic setting uplift Argentina Cuyo Basin Precordillera
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p267_Cortes 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	paper:paper_03058719_v399_n_p267_Cortes
record_format	dspace
spelling	paper:paper_03058719_v399_n_p267_Cortes2023-06-08T15:31:00Z Quaternary tectonics along oblique deformation zones in the Central Andean retro-wedge between 31°30'S and 35°S Cortes, Jose Maria Terrizzano, Carla Marina Pasini, María Mercedes Yamin, Marcela G. Casa, Analía Laura 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. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p267_Cortes 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 Cortes, Jose Maria Terrizzano, Carla Marina Pasini, María Mercedes Yamin, Marcela G. Casa, Analía Laura 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.
author	Cortes, Jose Maria Terrizzano, Carla Marina Pasini, María Mercedes Yamin, Marcela G. Casa, Analía Laura
author_facet	Cortes, Jose Maria Terrizzano, Carla Marina Pasini, María Mercedes Yamin, Marcela G. Casa, Analía Laura
author_sort	Cortes, Jose Maria
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
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p267_Cortes http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p267_Cortes
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_version_	1768544550554435584

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

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