Structure, stratigraphy and tectonic evolution of the Ñirihuau basin in the río Cushamen region, Chubut

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The southern part of the Ñirihuau basin at the valley of the Cushamen River region, is deformed and uplifted forming a prominent Precordillera Patagónica fold and thrust belt, east of the Patagonian Andes. The Ñirihuau Basin infill is represented by Oligocene to Miocene sedimentary to volcaniclastic...

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Autores principales: Ramos, Miguel Esteban, Orts, Dario Leandro, Pazos, Pablo Jose, Folguera, Andrés, Ramos, Victor Alberto
Publicado: 2011
Materias:
Ñirihuau basin
Patagonia
Progressive uncomformities
Synorogenic basins
basin evolution
deformation
fold and thrust belt
foreland basin
infill
lithotype
reactivation
sedimentation
stratigraphy
tectonic evolution
unconformity
uplift
Andes
Argentina
Chubut
Cushamen
Nirihuau Basin
Precordillera
Rio Negro [Argentina]
Cura
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v68_n2_p210_Ramos
http://hdl.handle.net/20.500.12110/paper_00044822_v68_n2_p210_Ramos
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00044822_v68_n2_p210_Ramos
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spelling paper:paper_00044822_v68_n2_p210_Ramos2023-06-08T14:26:33Z Structure, stratigraphy and tectonic evolution of the Ñirihuau basin in the río Cushamen region, Chubut Ramos, Miguel Esteban Orts, Dario Leandro Pazos, Pablo Jose Folguera, Andrés Ramos, Victor Alberto Ñirihuau basin Patagonia Progressive uncomformities Synorogenic basins basin evolution deformation fold and thrust belt foreland basin infill lithotype reactivation sedimentation stratigraphy tectonic evolution unconformity uplift Andes Argentina Chubut Cushamen Nirihuau Basin Patagonia Precordillera Rio Negro [Argentina] Cura The southern part of the Ñirihuau basin at the valley of the Cushamen River region, is deformed and uplifted forming a prominent Precordillera Patagónica fold and thrust belt, east of the Patagonian Andes. The Ñirihuau Basin infill is represented by Oligocene to Miocene sedimentary to volcaniclastic rocks gathered in eleven litho types belonging to four members. These foreland sequences are exposed by a combination of thin-skinned deformation whose shortening is transferred to the basement in the west beneath the Cordón del Maitén. The entire Ñirihuau section as well as the overlying Collón Cura Formation is characterized by the occurrence of progressive unconformities, fact that implies synorogenic sedimentation at the time of the Cordón del Maitén range uplift. This belt is formed by an east-verging basement wedge associated with a series of backthrusts. The reactivation of the deformation associated with growth strata, indicates that the basin has evolved in a wedge-top of a foreland system in different pulses of deformation. Fil:Ramos, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Orts, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pazos, P.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Folguera, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ramos, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v68_n2_p210_Ramos http://hdl.handle.net/20.500.12110/paper_00044822_v68_n2_p210_Ramos
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Ñirihuau basin
Patagonia
Progressive uncomformities
Synorogenic basins
basin evolution
deformation
fold and thrust belt
foreland basin
infill
lithotype
reactivation
sedimentation
stratigraphy
tectonic evolution
unconformity
uplift
Andes
Argentina
Chubut
Cushamen
Nirihuau Basin
Patagonia
Precordillera
Rio Negro [Argentina]
Cura
spellingShingle Ñirihuau basin
Patagonia
Progressive uncomformities
Synorogenic basins
basin evolution
deformation
fold and thrust belt
foreland basin
infill
lithotype
reactivation
sedimentation
stratigraphy
tectonic evolution
unconformity
uplift
Andes
Argentina
Chubut
Cushamen
Nirihuau Basin
Patagonia
Precordillera
Rio Negro [Argentina]
Cura
Ramos, Miguel Esteban
Orts, Dario Leandro
Pazos, Pablo Jose
Folguera, Andrés
Ramos, Victor Alberto
Structure, stratigraphy and tectonic evolution of the Ñirihuau basin in the río Cushamen region, Chubut
topic_facet Ñirihuau basin
Patagonia
Progressive uncomformities
Synorogenic basins
basin evolution
deformation
fold and thrust belt
foreland basin
infill
lithotype
reactivation
sedimentation
stratigraphy
tectonic evolution
unconformity
uplift
Andes
Argentina
Chubut
Cushamen
Nirihuau Basin
Patagonia
Precordillera
Rio Negro [Argentina]
Cura
description The southern part of the Ñirihuau basin at the valley of the Cushamen River region, is deformed and uplifted forming a prominent Precordillera Patagónica fold and thrust belt, east of the Patagonian Andes. The Ñirihuau Basin infill is represented by Oligocene to Miocene sedimentary to volcaniclastic rocks gathered in eleven litho types belonging to four members. These foreland sequences are exposed by a combination of thin-skinned deformation whose shortening is transferred to the basement in the west beneath the Cordón del Maitén. The entire Ñirihuau section as well as the overlying Collón Cura Formation is characterized by the occurrence of progressive unconformities, fact that implies synorogenic sedimentation at the time of the Cordón del Maitén range uplift. This belt is formed by an east-verging basement wedge associated with a series of backthrusts. The reactivation of the deformation associated with growth strata, indicates that the basin has evolved in a wedge-top of a foreland system in different pulses of deformation.
author Ramos, Miguel Esteban
Orts, Dario Leandro
Pazos, Pablo Jose
Folguera, Andrés
Ramos, Victor Alberto
author_facet Ramos, Miguel Esteban
Orts, Dario Leandro
Pazos, Pablo Jose
Folguera, Andrés
Ramos, Victor Alberto
author_sort Ramos, Miguel Esteban
title Structure, stratigraphy and tectonic evolution of the Ñirihuau basin in the río Cushamen region, Chubut
title_short Structure, stratigraphy and tectonic evolution of the Ñirihuau basin in the río Cushamen region, Chubut
title_full Structure, stratigraphy and tectonic evolution of the Ñirihuau basin in the río Cushamen region, Chubut
title_fullStr Structure, stratigraphy and tectonic evolution of the Ñirihuau basin in the río Cushamen region, Chubut
title_full_unstemmed Structure, stratigraphy and tectonic evolution of the Ñirihuau basin in the río Cushamen region, Chubut
title_sort structure, stratigraphy and tectonic evolution of the ñirihuau basin in the río cushamen region, chubut
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v68_n2_p210_Ramos
http://hdl.handle.net/20.500.12110/paper_00044822_v68_n2_p210_Ramos
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