Andean evolution of the Aluminé fold and thrust belt, Northern Patagonian Andes (38°30'-40°30'S)

The Aluminé fold and thrust belt between 38°30' and 40°30'S is the result of two periods of progression of deformation toward the foreland. The chronology of deformation and its relationship with magmatism through time show spatially and temporally separated magmatic events closely linked...

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Autores principales: García Morabito, E., Ramos, V.A.
Formato: JOUR
Materias:
Collón Cura basin
Mountain uplift
Patagonian Andes
Southern Neuquén Precordillera
accumulation rate
Cretaceous
deformation mechanism
extensional tectonics
fold and thrust belt
foreland basin
geochronology
Miocene
mountain region
orogeny
Pliocene
tectonic evolution
tectonostratigraphy
uplift
volcaniclastic deposit
Argentina
Neuquen
Patagonia
Cura
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08959811_v38_n_p13_GarciaMorabito
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_08959811_v38_n_p13_GarciaMorabito
record_format dspace
spelling todo:paper_08959811_v38_n_p13_GarciaMorabito2023-10-03T15:43:04Z Andean evolution of the Aluminé fold and thrust belt, Northern Patagonian Andes (38°30'-40°30'S) García Morabito, E. Ramos, V.A. Collón Cura basin Mountain uplift Patagonian Andes Southern Neuquén Precordillera accumulation rate Cretaceous deformation mechanism extensional tectonics fold and thrust belt foreland basin geochronology Miocene mountain region orogeny Pliocene tectonic evolution tectonostratigraphy uplift volcaniclastic deposit Argentina Neuquen Patagonia Cura The Aluminé fold and thrust belt between 38°30' and 40°30'S is the result of two periods of progression of deformation toward the foreland. The chronology of deformation and its relationship with magmatism through time show spatially and temporally separated magmatic events closely linked to distinct deformational stages. Data presented here confirms a Late Cretaceous mountain-building phase that coexisted in space and time with an eastward arc-migration. During this stage, a belt of deformation expanded through the foreland where it produced the Southern Neuquen Precordillera. This eastern independent mountain grew separately from the main Andean axis through a combination of inversion of the old rift systems and interaction with a pre-Andean belt which acted as a foreland obstacle. On the basis of tectonostratigraphic controls we define the last Andean contractional phase between the Late Miocene and the Pliocene. This event induced the reactivation of both sectors of the fold and thrust belt with minor propagation toward the foreland, leading to the uplift of the Patagonian Andes and reshaping the Southern Neuquén Precordillera. Both intervals of shortening are separated by a period of localized extension that resulted in the development of the Collón Cura basin within this Andean segment. Here, large thicknesses of volcanosedimentary sequences accumulated contemporaneously with the extensional activity between the earliest Oligocene and the Early Miocene. © 2012 Elsevier Ltd. Fil:García Morabito, E. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08959811_v38_n_p13_GarciaMorabito
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Collón Cura basin
Mountain uplift
Patagonian Andes
Southern Neuquén Precordillera
accumulation rate
Cretaceous
deformation mechanism
extensional tectonics
fold and thrust belt
foreland basin
geochronology
Miocene
mountain region
orogeny
Pliocene
tectonic evolution
tectonostratigraphy
uplift
volcaniclastic deposit
Argentina
Neuquen
Patagonia
Cura
spellingShingle Collón Cura basin
Mountain uplift
Patagonian Andes
Southern Neuquén Precordillera
accumulation rate
Cretaceous
deformation mechanism
extensional tectonics
fold and thrust belt
foreland basin
geochronology
Miocene
mountain region
orogeny
Pliocene
tectonic evolution
tectonostratigraphy
uplift
volcaniclastic deposit
Argentina
Neuquen
Patagonia
Cura
García Morabito, E.
Ramos, V.A.
Andean evolution of the Aluminé fold and thrust belt, Northern Patagonian Andes (38°30'-40°30'S)
topic_facet Collón Cura basin
Mountain uplift
Patagonian Andes
Southern Neuquén Precordillera
accumulation rate
Cretaceous
deformation mechanism
extensional tectonics
fold and thrust belt
foreland basin
geochronology
Miocene
mountain region
orogeny
Pliocene
tectonic evolution
tectonostratigraphy
uplift
volcaniclastic deposit
Argentina
Neuquen
Patagonia
Cura
description The Aluminé fold and thrust belt between 38°30' and 40°30'S is the result of two periods of progression of deformation toward the foreland. The chronology of deformation and its relationship with magmatism through time show spatially and temporally separated magmatic events closely linked to distinct deformational stages. Data presented here confirms a Late Cretaceous mountain-building phase that coexisted in space and time with an eastward arc-migration. During this stage, a belt of deformation expanded through the foreland where it produced the Southern Neuquen Precordillera. This eastern independent mountain grew separately from the main Andean axis through a combination of inversion of the old rift systems and interaction with a pre-Andean belt which acted as a foreland obstacle. On the basis of tectonostratigraphic controls we define the last Andean contractional phase between the Late Miocene and the Pliocene. This event induced the reactivation of both sectors of the fold and thrust belt with minor propagation toward the foreland, leading to the uplift of the Patagonian Andes and reshaping the Southern Neuquén Precordillera. Both intervals of shortening are separated by a period of localized extension that resulted in the development of the Collón Cura basin within this Andean segment. Here, large thicknesses of volcanosedimentary sequences accumulated contemporaneously with the extensional activity between the earliest Oligocene and the Early Miocene. © 2012 Elsevier Ltd.
format JOUR
author García Morabito, E.
Ramos, V.A.
author_facet García Morabito, E.
Ramos, V.A.
author_sort García Morabito, E.
title Andean evolution of the Aluminé fold and thrust belt, Northern Patagonian Andes (38°30'-40°30'S)
title_short Andean evolution of the Aluminé fold and thrust belt, Northern Patagonian Andes (38°30'-40°30'S)
title_full Andean evolution of the Aluminé fold and thrust belt, Northern Patagonian Andes (38°30'-40°30'S)
title_fullStr Andean evolution of the Aluminé fold and thrust belt, Northern Patagonian Andes (38°30'-40°30'S)
title_full_unstemmed Andean evolution of the Aluminé fold and thrust belt, Northern Patagonian Andes (38°30'-40°30'S)
title_sort andean evolution of the aluminé fold and thrust belt, northern patagonian andes (38°30'-40°30's)
url http://hdl.handle.net/20.500.12110/paper_08959811_v38_n_p13_GarciaMorabito
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AT ramosva andeanevolutionofthealuminefoldandthrustbeltnorthernpatagonianandes38304030s
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