Tectonic development of the North Patagonian Andes and their related Miocene foreland basin (41°30'-43°S)

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The Northern Patagonian Andes have been constructed through multiple mechanisms that range from tectonic inversion of extensional structures of Early to Middle Jurassic age in the Main Andes to Oligocene in the Precordilleran region. These have acted during two distinctive orogenic stages, first in...

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Autores principales: Orts, Dario Leandro, Folguera, Andrés, Ramos, Miguel Esteban, Tobal, Jonathan Elías, Ramos, Victor Alberto
Publicado: 2012
Materias:
Early Cretaceous
Foreland basin
Frontal zones
Growth strata
Late Miocene
Late Oligocene
Marine transgression
Middle Jurassic
Miocene
Oligocene
Orogenic wedge
Pliocene
Tectonic development
Tectonics
extensional tectonics
foreland basin
graben
granite
Jurassic
orogeny
tectonic setting
transgression
volcanic rock
Andes
Patagonia
Precordillera
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02787407_v31_n3_p_Orts
http://hdl.handle.net/20.500.12110/paper_02787407_v31_n3_p_Orts
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_02787407_v31_n3_p_Orts2023-06-08T15:26:53Z Tectonic development of the North Patagonian Andes and their related Miocene foreland basin (41°30'-43°S) Orts, Dario Leandro Folguera, Andrés Ramos, Miguel Esteban Tobal, Jonathan Elías Ramos, Victor Alberto Early Cretaceous Foreland basin Frontal zones Growth strata Late Miocene Late Oligocene Marine transgression Middle Jurassic Miocene Oligocene Orogenic wedge Pliocene Tectonic development Tectonics extensional tectonics foreland basin graben granite Jurassic Miocene Oligocene orogeny tectonic setting transgression volcanic rock Andes Patagonia Precordillera The Northern Patagonian Andes have been constructed through multiple mechanisms that range from tectonic inversion of extensional structures of Early to Middle Jurassic age in the Main Andes to Oligocene in the Precordilleran region. These have acted during two distinctive orogenic stages, first in late Early Cretaceous and later in Miocene times Late Oligocene extension separates these two contractional periods and is recorded by half-grabens developed in the retroarc region. The last contractional stage coexists with an eastward foreland expansion of the late Miocene arc whose roots are presently exposed as minor granitic stocks and volcanic piles subordinately in the Main Andes, east of the present arc. As a consequence of this orogenic stage a foreland basin has developed, having progressed from 18 Ma in the main North Patagonian Andes, where the mountain front was flooded by a marine transgression corresponding to the base of the irihuau Formation, to 11 Ma in the foreland area. Cannibalization of this foreland basin occurred initially in the hinterland and then progressed to the foreland zone. Blind structures formed a broken foreland at the frontal zone inferred from growth strata geometries. During Pliocene to Quaternary times most of the contractional deformation was dissipated in the orogenic wedge at the time when the arc front retracted to its present position. Copyright 2012 by the American Geophysical Union. Fil:Orts, D.L. 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, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tobal, J. 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. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02787407_v31_n3_p_Orts http://hdl.handle.net/20.500.12110/paper_02787407_v31_n3_p_Orts
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Early Cretaceous
Foreland basin
Frontal zones
Growth strata
Late Miocene
Late Oligocene
Marine transgression
Middle Jurassic
Miocene
Oligocene
Orogenic wedge
Pliocene
Tectonic development
Tectonics
extensional tectonics
foreland basin
graben
granite
Jurassic
Miocene
Oligocene
orogeny
tectonic setting
transgression
volcanic rock
Andes
Patagonia
Precordillera
spellingShingle Early Cretaceous
Foreland basin
Frontal zones
Growth strata
Late Miocene
Late Oligocene
Marine transgression
Middle Jurassic
Miocene
Oligocene
Orogenic wedge
Pliocene
Tectonic development
Tectonics
extensional tectonics
foreland basin
graben
granite
Jurassic
Miocene
Oligocene
orogeny
tectonic setting
transgression
volcanic rock
Andes
Patagonia
Precordillera
Orts, Dario Leandro
Folguera, Andrés
Ramos, Miguel Esteban
Tobal, Jonathan Elías
Ramos, Victor Alberto
Tectonic development of the North Patagonian Andes and their related Miocene foreland basin (41°30'-43°S)
topic_facet Early Cretaceous
Foreland basin
Frontal zones
Growth strata
Late Miocene
Late Oligocene
Marine transgression
Middle Jurassic
Miocene
Oligocene
Orogenic wedge
Pliocene
Tectonic development
Tectonics
extensional tectonics
foreland basin
graben
granite
Jurassic
Miocene
Oligocene
orogeny
tectonic setting
transgression
volcanic rock
Andes
Patagonia
Precordillera
description The Northern Patagonian Andes have been constructed through multiple mechanisms that range from tectonic inversion of extensional structures of Early to Middle Jurassic age in the Main Andes to Oligocene in the Precordilleran region. These have acted during two distinctive orogenic stages, first in late Early Cretaceous and later in Miocene times Late Oligocene extension separates these two contractional periods and is recorded by half-grabens developed in the retroarc region. The last contractional stage coexists with an eastward foreland expansion of the late Miocene arc whose roots are presently exposed as minor granitic stocks and volcanic piles subordinately in the Main Andes, east of the present arc. As a consequence of this orogenic stage a foreland basin has developed, having progressed from 18 Ma in the main North Patagonian Andes, where the mountain front was flooded by a marine transgression corresponding to the base of the irihuau Formation, to 11 Ma in the foreland area. Cannibalization of this foreland basin occurred initially in the hinterland and then progressed to the foreland zone. Blind structures formed a broken foreland at the frontal zone inferred from growth strata geometries. During Pliocene to Quaternary times most of the contractional deformation was dissipated in the orogenic wedge at the time when the arc front retracted to its present position. Copyright 2012 by the American Geophysical Union.
author Orts, Dario Leandro
Folguera, Andrés
Ramos, Miguel Esteban
Tobal, Jonathan Elías
Ramos, Victor Alberto
author_facet Orts, Dario Leandro
Folguera, Andrés
Ramos, Miguel Esteban
Tobal, Jonathan Elías
Ramos, Victor Alberto
author_sort Orts, Dario Leandro
title Tectonic development of the North Patagonian Andes and their related Miocene foreland basin (41°30'-43°S)
title_short Tectonic development of the North Patagonian Andes and their related Miocene foreland basin (41°30'-43°S)
title_full Tectonic development of the North Patagonian Andes and their related Miocene foreland basin (41°30'-43°S)
title_fullStr Tectonic development of the North Patagonian Andes and their related Miocene foreland basin (41°30'-43°S)
title_full_unstemmed Tectonic development of the North Patagonian Andes and their related Miocene foreland basin (41°30'-43°S)
title_sort tectonic development of the north patagonian andes and their related miocene foreland basin (41°30'-43°s)
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02787407_v31_n3_p_Orts
http://hdl.handle.net/20.500.12110/paper_02787407_v31_n3_p_Orts
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