Aptian to recent compressional deformation, foothills of the Neuquén Basin, Argentina

The Neuquén Basin lies in north-western Patagonia, on the eastern foreland of the Andes. It formed as a rift basin in the early Mesozoic and contains some 5000 m of Triassic to Aptian sediment, mainly marine. As a result of Andean orogeny, the western edge of the basin now forms part of the foothill...

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Autores principales: Cobbold, P.R., Rossello, E.A.
Formato: JOUR
Materias:
Andean deformation
Aptian to recent
Foothills
Neuquén Basin
Deformation
Earthquakes
Sediments
Rift transfer zone
Petroleum geology
basin evolution
basin fill
Cenozoic
compression
hydrocarbon reservoir
structural geology
tectonic setting
Argentina
Neuquen Basin
Patagonia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02648172_v20_n5_p429_Cobbold
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02648172_v20_n5_p429_Cobbold
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spelling todo:paper_02648172_v20_n5_p429_Cobbold2023-10-03T15:13:04Z Aptian to recent compressional deformation, foothills of the Neuquén Basin, Argentina Cobbold, P.R. Rossello, E.A. Andean deformation Aptian to recent Foothills Neuquén Basin Deformation Earthquakes Sediments Rift transfer zone Petroleum geology basin evolution basin fill Cenozoic compression hydrocarbon reservoir structural geology tectonic setting Argentina Neuquen Basin Patagonia The Neuquén Basin lies in north-western Patagonia, on the eastern foreland of the Andes. It formed as a rift basin in the early Mesozoic and contains some 5000 m of Triassic to Aptian sediment, mainly marine. As a result of Andean orogeny, the western edge of the basin now forms part of the foothills. We describe some of the main compressional structures, drawing on surface and sub-surface data. We argue that regional eastward dips are due to west-verging thrust displacements on the Andacollo-Loncopué fault system. During a Late Cretaceous Peruvian phase (Aptian to Campanian), continental sediment accumulated in a retro-arc foreland basin, which was mainly of flexural origin. Nevertheless, more than 1500 m of Late Cretaceous sediment accumulated in the footwall of the east-verging Agua Amarga thrust. The Peruvian phase was responsible also for transpressional reactivation of a rift transfer zone, the Huincul Arch. The Incaic phase (Eocene) was responsible for north-westerly trending folds and thrusts, reactivation of Cretaceous thrusts, abundant andesitic lavas and high-level intrusions, and a swarm of north-easterly trending bitumen dykes. The Quechua phase (Miocene to Recent) produced northerly trending folds and thrusts and a Miocene foreland basin, containing some 1000 m of basalt lava flows. Structures that formed during the Incaic and Quechua phases are broadly compatible with the history of convergence at the Pacific margin of South America, as deduced from plate reconstructions. © 2003 Elsevier 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_02648172_v20_n5_p429_Cobbold
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 deformation
Aptian to recent
Foothills
Neuquén Basin
Deformation
Earthquakes
Sediments
Rift transfer zone
Petroleum geology
basin evolution
basin fill
Cenozoic
compression
hydrocarbon reservoir
structural geology
tectonic setting
Argentina
Neuquen Basin
Patagonia
spellingShingle Andean deformation
Aptian to recent
Foothills
Neuquén Basin
Deformation
Earthquakes
Sediments
Rift transfer zone
Petroleum geology
basin evolution
basin fill
Cenozoic
compression
hydrocarbon reservoir
structural geology
tectonic setting
Argentina
Neuquen Basin
Patagonia
Cobbold, P.R.
Rossello, E.A.
Aptian to recent compressional deformation, foothills of the Neuquén Basin, Argentina
topic_facet Andean deformation
Aptian to recent
Foothills
Neuquén Basin
Deformation
Earthquakes
Sediments
Rift transfer zone
Petroleum geology
basin evolution
basin fill
Cenozoic
compression
hydrocarbon reservoir
structural geology
tectonic setting
Argentina
Neuquen Basin
Patagonia
description The Neuquén Basin lies in north-western Patagonia, on the eastern foreland of the Andes. It formed as a rift basin in the early Mesozoic and contains some 5000 m of Triassic to Aptian sediment, mainly marine. As a result of Andean orogeny, the western edge of the basin now forms part of the foothills. We describe some of the main compressional structures, drawing on surface and sub-surface data. We argue that regional eastward dips are due to west-verging thrust displacements on the Andacollo-Loncopué fault system. During a Late Cretaceous Peruvian phase (Aptian to Campanian), continental sediment accumulated in a retro-arc foreland basin, which was mainly of flexural origin. Nevertheless, more than 1500 m of Late Cretaceous sediment accumulated in the footwall of the east-verging Agua Amarga thrust. The Peruvian phase was responsible also for transpressional reactivation of a rift transfer zone, the Huincul Arch. The Incaic phase (Eocene) was responsible for north-westerly trending folds and thrusts, reactivation of Cretaceous thrusts, abundant andesitic lavas and high-level intrusions, and a swarm of north-easterly trending bitumen dykes. The Quechua phase (Miocene to Recent) produced northerly trending folds and thrusts and a Miocene foreland basin, containing some 1000 m of basalt lava flows. Structures that formed during the Incaic and Quechua phases are broadly compatible with the history of convergence at the Pacific margin of South America, as deduced from plate reconstructions. © 2003 Elsevier Ltd. All rights reserved.
format JOUR
author Cobbold, P.R.
Rossello, E.A.
author_facet Cobbold, P.R.
Rossello, E.A.
author_sort Cobbold, P.R.
title Aptian to recent compressional deformation, foothills of the Neuquén Basin, Argentina
title_short Aptian to recent compressional deformation, foothills of the Neuquén Basin, Argentina
title_full Aptian to recent compressional deformation, foothills of the Neuquén Basin, Argentina
title_fullStr Aptian to recent compressional deformation, foothills of the Neuquén Basin, Argentina
title_full_unstemmed Aptian to recent compressional deformation, foothills of the Neuquén Basin, Argentina
title_sort aptian to recent compressional deformation, foothills of the neuquén basin, argentina
url http://hdl.handle.net/20.500.12110/paper_02648172_v20_n5_p429_Cobbold
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AT rosselloea aptiantorecentcompressionaldeformationfoothillsoftheneuquenbasinargentina
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