Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province

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The Atuel depocentre corresponds to a Late Triassic - Early Jurassic NNW-trending subbasin, located in the northern sector of the Neuquén basin. Based on pre-existing stratigraphical data and present structural analysis we propose that the Atuel depocentre is bounded by the presence of two NNW-trend...

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Autores principales: Giambiagi, L., Bechis, F., Lanés, S., Tunik, M., García, V., Suriano, J., Mescua, J.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2008
Materias:
Extension
Main Cordillera
Neuquén Basin
Rift
Triassic-Jurassic
depocenter
displacement
extensional tectonics
fault zone
formation mechanism
graben
Jurassic
rifting
structural geology
tectonic evolution
tectonic setting
trend analysis
Triassic
Argentina
Mendoza
Neuquen Basin
South America
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v63_n4_p520_Giambiagi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paperaa:paper_00044822_v63_n4_p520_Giambiagi2023-06-12T16:40:17Z Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province Rev. Asoc. Geol. Argent. 2008;63(4):520-533 Giambiagi, L. Bechis, F. Lanés, S. Tunik, M. García, V. Suriano, J. Mescua, J. Extension Main Cordillera Neuquén Basin Rift Triassic-Jurassic depocenter displacement extensional tectonics fault zone formation mechanism graben Jurassic rifting structural geology tectonic evolution tectonic setting trend analysis Triassic Argentina Mendoza Neuquen Basin South America The Atuel depocentre corresponds to a Late Triassic - Early Jurassic NNW-trending subbasin, located in the northern sector of the Neuquén basin. Based on pre-existing stratigraphical data and present structural analysis we propose that the Atuel depocentre is bounded by the presence of two NNW-trending major normal faults, named Alumbre and La Manga. These faults are inferred to have controlled the development of two west-facing half-grabens: the Río Blanco, a completely emerged half-graben, and the western Arroyo Malo, a completely submerged half-graben. The structural model presented here is based on the assumption that both, the basement structural grain and the regional extension direction, exerted a first-order control in the development and evolution of the Atuel depocentre. During the early stage of rifting (pre-Rhaetian - Middle Hettangian) the pre-Triassic Alumbre and La Manga faults reactivated in an oblique mode. During the second episode of rifting, both Alumbre and La Manga faults continued to play, while WNW-trending normal fault developed in order to accommodate the strain inside both half-grabens. The third extensional event began with an abrupt marine rise inside the Arroyo Malo half-graben during late Middle Hettangian, as a result of the last displacement of the Alumbre fault, and finished with an abrupt marine drop associated with the desactivation of the La Manga fault. Fil:Giambiagi, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bechis, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lanés, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tunik, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:García, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Suriano, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mescua, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v63_n4_p520_Giambiagi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Extension
Main Cordillera
Neuquén Basin
Rift
Triassic-Jurassic
depocenter
displacement
extensional tectonics
fault zone
formation mechanism
graben
Jurassic
rifting
structural geology
tectonic evolution
tectonic setting
trend analysis
Triassic
Argentina
Mendoza
Neuquen Basin
South America
spellingShingle Extension
Main Cordillera
Neuquén Basin
Rift
Triassic-Jurassic
depocenter
displacement
extensional tectonics
fault zone
formation mechanism
graben
Jurassic
rifting
structural geology
tectonic evolution
tectonic setting
trend analysis
Triassic
Argentina
Mendoza
Neuquen Basin
South America
Giambiagi, L.
Bechis, F.
Lanés, S.
Tunik, M.
García, V.
Suriano, J.
Mescua, J.
Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province
topic_facet Extension
Main Cordillera
Neuquén Basin
Rift
Triassic-Jurassic
depocenter
displacement
extensional tectonics
fault zone
formation mechanism
graben
Jurassic
rifting
structural geology
tectonic evolution
tectonic setting
trend analysis
Triassic
Argentina
Mendoza
Neuquen Basin
South America
description The Atuel depocentre corresponds to a Late Triassic - Early Jurassic NNW-trending subbasin, located in the northern sector of the Neuquén basin. Based on pre-existing stratigraphical data and present structural analysis we propose that the Atuel depocentre is bounded by the presence of two NNW-trending major normal faults, named Alumbre and La Manga. These faults are inferred to have controlled the development of two west-facing half-grabens: the Río Blanco, a completely emerged half-graben, and the western Arroyo Malo, a completely submerged half-graben. The structural model presented here is based on the assumption that both, the basement structural grain and the regional extension direction, exerted a first-order control in the development and evolution of the Atuel depocentre. During the early stage of rifting (pre-Rhaetian - Middle Hettangian) the pre-Triassic Alumbre and La Manga faults reactivated in an oblique mode. During the second episode of rifting, both Alumbre and La Manga faults continued to play, while WNW-trending normal fault developed in order to accommodate the strain inside both half-grabens. The third extensional event began with an abrupt marine rise inside the Arroyo Malo half-graben during late Middle Hettangian, as a result of the last displacement of the Alumbre fault, and finished with an abrupt marine drop associated with the desactivation of the La Manga fault.
format Artículo
Artículo
publishedVersion
author Giambiagi, L.
Bechis, F.
Lanés, S.
Tunik, M.
García, V.
Suriano, J.
Mescua, J.
author_facet Giambiagi, L.
Bechis, F.
Lanés, S.
Tunik, M.
García, V.
Suriano, J.
Mescua, J.
author_sort Giambiagi, L.
title Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province
title_short Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province
title_full Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province
title_fullStr Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province
title_full_unstemmed Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province
title_sort triassic-jurassic development and evolution of the atuel depocentre, neuquén basin, mendoza province
publishDate 2008
url http://hdl.handle.net/20.500.12110/paper_00044822_v63_n4_p520_Giambiagi
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