Cenozoic tectonic evolution of the Alto Tunuyán foreland basin above the transition zone between the flat and normal subduction segment (33°30′-34°S), western Argentina

The Alto Tunuyán basin is a Neogene foreland basin located between Cordillera Principal and Cordillera Frontal, from 33°30′ to 34°00′ south latitude. At this latitude, the feature that characterizes the subduction geometry beneath the Andean Cordillera is a transition in the slab dip from nearly hor...

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Autores principales: Giambiagi, L.B., Tunik, M.A., Ghiglione, M.
Formato: JOUR
Materias:
Andean evolution
Foreland basin system
Transition subduction segment
Andean orogeny
Cenozoic
foreland basin
Neogene
subduction
tectonic evolution
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08959811_v14_n7_p707_Giambiagi
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_08959811_v14_n7_p707_Giambiagi2023-10-03T15:42:31Z Cenozoic tectonic evolution of the Alto Tunuyán foreland basin above the transition zone between the flat and normal subduction segment (33°30′-34°S), western Argentina Giambiagi, L.B. Tunik, M.A. Ghiglione, M. Andean evolution Foreland basin system Transition subduction segment Andean orogeny Cenozoic foreland basin Neogene subduction tectonic evolution Argentina The Alto Tunuyán basin is a Neogene foreland basin located between Cordillera Principal and Cordillera Frontal, from 33°30′ to 34°00′ south latitude. At this latitude, the feature that characterizes the subduction geometry beneath the Andean Cordillera is a transition in the slab dip from nearly horizontal, north of 33°S, to normal dip, south of 34°S. This particular tectonic setting apparently controlled the Neogene tectonic history of the area. The Neogene sedimentary infill of the basin is represented by the Tunuyán Conglomerate and the Palomares, Butaló, and Papal formations. Thrusting and uplift of the Cordillera Principal began during the early Miocene. Deformation and uplift of the volcanic arc, located on the western part of the thrust belt, produced the sediment source for the lower 200 m of the Tunuyán Conglomerate. As deformation migrated progressively eastward during middle Miocene times, it involved the underlying Mesozoic sequences, the erosion of which provided the material accumulated in the rest of the Tunuyán Conglomerate. The Palomares Formation unconformably overlying the former unit reflects the uplift of Cordillera Frontal. Deposition of the Butaló and Papal formations over the partially deformed broken foreland basin reflects accumulation during a period of tectonic quiescence and low rate of erosion in the eastern part of Cordillera Principal and the western part of Cordillera Frontal. The basement uplift of Cordillera Frontal generated a sticking point that prevented the propagation of the thrust belt toward the foreland. Consequently, out-of-sequence thrusts developed in the Cordillera Principal and the basin was partially cannibalized. © 2001 Elsevier Science Ltd. 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_08959811_v14_n7_p707_Giambiagi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Andean evolution
Foreland basin system
Transition subduction segment
Andean orogeny
Cenozoic
foreland basin
Neogene
subduction
tectonic evolution
Argentina
spellingShingle Andean evolution
Foreland basin system
Transition subduction segment
Andean orogeny
Cenozoic
foreland basin
Neogene
subduction
tectonic evolution
Argentina
Giambiagi, L.B.
Tunik, M.A.
Ghiglione, M.
Cenozoic tectonic evolution of the Alto Tunuyán foreland basin above the transition zone between the flat and normal subduction segment (33°30′-34°S), western Argentina
topic_facet Andean evolution
Foreland basin system
Transition subduction segment
Andean orogeny
Cenozoic
foreland basin
Neogene
subduction
tectonic evolution
Argentina
description The Alto Tunuyán basin is a Neogene foreland basin located between Cordillera Principal and Cordillera Frontal, from 33°30′ to 34°00′ south latitude. At this latitude, the feature that characterizes the subduction geometry beneath the Andean Cordillera is a transition in the slab dip from nearly horizontal, north of 33°S, to normal dip, south of 34°S. This particular tectonic setting apparently controlled the Neogene tectonic history of the area. The Neogene sedimentary infill of the basin is represented by the Tunuyán Conglomerate and the Palomares, Butaló, and Papal formations. Thrusting and uplift of the Cordillera Principal began during the early Miocene. Deformation and uplift of the volcanic arc, located on the western part of the thrust belt, produced the sediment source for the lower 200 m of the Tunuyán Conglomerate. As deformation migrated progressively eastward during middle Miocene times, it involved the underlying Mesozoic sequences, the erosion of which provided the material accumulated in the rest of the Tunuyán Conglomerate. The Palomares Formation unconformably overlying the former unit reflects the uplift of Cordillera Frontal. Deposition of the Butaló and Papal formations over the partially deformed broken foreland basin reflects accumulation during a period of tectonic quiescence and low rate of erosion in the eastern part of Cordillera Principal and the western part of Cordillera Frontal. The basement uplift of Cordillera Frontal generated a sticking point that prevented the propagation of the thrust belt toward the foreland. Consequently, out-of-sequence thrusts developed in the Cordillera Principal and the basin was partially cannibalized. © 2001 Elsevier Science Ltd. All rights reserved.
format JOUR
author Giambiagi, L.B.
Tunik, M.A.
Ghiglione, M.
author_facet Giambiagi, L.B.
Tunik, M.A.
Ghiglione, M.
author_sort Giambiagi, L.B.
title Cenozoic tectonic evolution of the Alto Tunuyán foreland basin above the transition zone between the flat and normal subduction segment (33°30′-34°S), western Argentina
title_short Cenozoic tectonic evolution of the Alto Tunuyán foreland basin above the transition zone between the flat and normal subduction segment (33°30′-34°S), western Argentina
title_full Cenozoic tectonic evolution of the Alto Tunuyán foreland basin above the transition zone between the flat and normal subduction segment (33°30′-34°S), western Argentina
title_fullStr Cenozoic tectonic evolution of the Alto Tunuyán foreland basin above the transition zone between the flat and normal subduction segment (33°30′-34°S), western Argentina
title_full_unstemmed Cenozoic tectonic evolution of the Alto Tunuyán foreland basin above the transition zone between the flat and normal subduction segment (33°30′-34°S), western Argentina
title_sort cenozoic tectonic evolution of the alto tunuyán foreland basin above the transition zone between the flat and normal subduction segment (33°30′-34°s), western argentina
url http://hdl.handle.net/20.500.12110/paper_08959811_v14_n7_p707_Giambiagi
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AT tunikma cenozoictectonicevolutionofthealtotunuyanforelandbasinabovethetransitionzonebetweentheflatandnormalsubductionsegment333034swesternargentina
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