Evolution of the Chos Malal and Agrio fold and thrust belts, Andes of Neuquén: Insights from structural analysis and apatite fission track dating

The Chos Malal and Agrio fold and thrust belts are located in the western part of the Neuquén basin, an Andean retroarc basin of central-western Argentina. Both belts show evidence of tectonic inversion at the western part during Late Cretaceous times. The eastern part is dominated by late Miocene d...

Descripción completa

Detalles Bibliográficos
Publicado: 2015
Materias:
Andean uplift
Exhumation
Foreland basin
Synorogenic deposits
Tectonic inversion
Thick-skinned belt
Thin-skinned belt
apatite
Cretaceous
exhumation
fission track dating
fold and thrust belt
foreland basin
Paleocene
structural geology
tectonic evolution
tectonic setting
Andes
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v64_n_p418_RojasVera
http://hdl.handle.net/20.500.12110/paper_08959811_v64_n_p418_RojasVera
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_08959811_v64_n_p418_RojasVera
record_format dspace
spelling paper:paper_08959811_v64_n_p418_RojasVera2023-06-08T15:48:50Z Evolution of the Chos Malal and Agrio fold and thrust belts, Andes of Neuquén: Insights from structural analysis and apatite fission track dating Andean uplift Exhumation Foreland basin Synorogenic deposits Tectonic inversion Thick-skinned belt Thin-skinned belt apatite Cretaceous exhumation fission track dating fold and thrust belt foreland basin Paleocene structural geology tectonic evolution tectonic setting Andes The Chos Malal and Agrio fold and thrust belts are located in the western part of the Neuquén basin, an Andean retroarc basin of central-western Argentina. Both belts show evidence of tectonic inversion at the western part during Late Cretaceous times. The eastern part is dominated by late Miocene deformation which also partially reactivated the western structures. This work focuses on the study of the regional structure and the deformational event that shaped the relief of this part of the Andes. Based on new field work and structural data and previously published works a detailed map of the central part of the Neuquén basin is presented. Three regional structural cross sections were surveyed and balanced using the 2d Move™ software. In order to define a more accurate uplift history, new apatite fission track analyses were carried on selected structures. These data was used for new thermal history modeling of the inner part of the Agrio and Chos Malal fold and thrust belts. The results of the fission track analyses improve the knowledge of how these fold and thrust belts have grown trough time. Two main deformational events are defined in Late Cretaceous to Paleocene and Late Miocene times. Based on this regional structural analysis and the fission track data the precise location of the orogenic front for the Late Cretaceous-Paleocene times is reconstructed and it is proposed a structural evolution of this segment of the Andes. This new exhumation data show how the Late Cretaceous to Paleocene event was a continuous and uninterrupted deformational event. © 2015 Elsevier Ltd. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v64_n_p418_RojasVera http://hdl.handle.net/20.500.12110/paper_08959811_v64_n_p418_RojasVera
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 uplift
Exhumation
Foreland basin
Synorogenic deposits
Tectonic inversion
Thick-skinned belt
Thin-skinned belt
apatite
Cretaceous
exhumation
fission track dating
fold and thrust belt
foreland basin
Paleocene
structural geology
tectonic evolution
tectonic setting
Andes
spellingShingle Andean uplift
Exhumation
Foreland basin
Synorogenic deposits
Tectonic inversion
Thick-skinned belt
Thin-skinned belt
apatite
Cretaceous
exhumation
fission track dating
fold and thrust belt
foreland basin
Paleocene
structural geology
tectonic evolution
tectonic setting
Andes
Evolution of the Chos Malal and Agrio fold and thrust belts, Andes of Neuquén: Insights from structural analysis and apatite fission track dating
topic_facet Andean uplift
Exhumation
Foreland basin
Synorogenic deposits
Tectonic inversion
Thick-skinned belt
Thin-skinned belt
apatite
Cretaceous
exhumation
fission track dating
fold and thrust belt
foreland basin
Paleocene
structural geology
tectonic evolution
tectonic setting
Andes
description The Chos Malal and Agrio fold and thrust belts are located in the western part of the Neuquén basin, an Andean retroarc basin of central-western Argentina. Both belts show evidence of tectonic inversion at the western part during Late Cretaceous times. The eastern part is dominated by late Miocene deformation which also partially reactivated the western structures. This work focuses on the study of the regional structure and the deformational event that shaped the relief of this part of the Andes. Based on new field work and structural data and previously published works a detailed map of the central part of the Neuquén basin is presented. Three regional structural cross sections were surveyed and balanced using the 2d Move™ software. In order to define a more accurate uplift history, new apatite fission track analyses were carried on selected structures. These data was used for new thermal history modeling of the inner part of the Agrio and Chos Malal fold and thrust belts. The results of the fission track analyses improve the knowledge of how these fold and thrust belts have grown trough time. Two main deformational events are defined in Late Cretaceous to Paleocene and Late Miocene times. Based on this regional structural analysis and the fission track data the precise location of the orogenic front for the Late Cretaceous-Paleocene times is reconstructed and it is proposed a structural evolution of this segment of the Andes. This new exhumation data show how the Late Cretaceous to Paleocene event was a continuous and uninterrupted deformational event. © 2015 Elsevier Ltd.
title Evolution of the Chos Malal and Agrio fold and thrust belts, Andes of Neuquén: Insights from structural analysis and apatite fission track dating
title_short Evolution of the Chos Malal and Agrio fold and thrust belts, Andes of Neuquén: Insights from structural analysis and apatite fission track dating
title_full Evolution of the Chos Malal and Agrio fold and thrust belts, Andes of Neuquén: Insights from structural analysis and apatite fission track dating
title_fullStr Evolution of the Chos Malal and Agrio fold and thrust belts, Andes of Neuquén: Insights from structural analysis and apatite fission track dating
title_full_unstemmed Evolution of the Chos Malal and Agrio fold and thrust belts, Andes of Neuquén: Insights from structural analysis and apatite fission track dating
title_sort evolution of the chos malal and agrio fold and thrust belts, andes of neuquén: insights from structural analysis and apatite fission track dating
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v64_n_p418_RojasVera
http://hdl.handle.net/20.500.12110/paper_08959811_v64_n_p418_RojasVera
_version_ 1768543854091304960

Ejemplares similares