Tectonic evolution of the Andean Fold and thrust belt of the southern Neuquén Basin, Argentina

The Andean Fold and Thrust belt between 36° and 39°S can be divided in two sectors. The Eastern Sector corresponds to the Agrio Fold and Thrust Belt (FTB) characterized by a major exhumation during the Late Cretaceous, and minor deformation during the late Eocene and Late Miocene. The Western Sector...

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Detalles Bibliográficos
Publicado: 2005
Materias:
basin evolution
fold and thrust belt
tectonic evolution
Argentina
Neuquen Basin
South America
Cura
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v252_n_p37_Zapata
http://hdl.handle.net/20.500.12110/paper_03058719_v252_n_p37_Zapata
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03058719_v252_n_p37_Zapata
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spelling paper:paper_03058719_v252_n_p37_Zapata2023-06-08T15:30:55Z Tectonic evolution of the Andean Fold and thrust belt of the southern Neuquén Basin, Argentina basin evolution fold and thrust belt tectonic evolution Argentina Neuquen Basin South America Cura Cura The Andean Fold and Thrust belt between 36° and 39°S can be divided in two sectors. The Eastern Sector corresponds to the Agrio Fold and Thrust Belt (FTB) characterized by a major exhumation during the Late Cretaceous, and minor deformation during the late Eocene and Late Miocene. The Western Sector corresponds to the main cordillera and is characterized by a complex evolution that involves periods of out-of-sequence thrusting with respect to the previously deformed outer sector, and pulses of relaxation of the compressive structure. Cretaceous uplift constituted an orogenic wedge that extended to the inner sectors of the Agrio FTB. Eocene compression was mainly concentrated within the Western Sector but may have reactivated the pre-existing structures of the Agrio FTB, such as the Cordillera del Viento. Late Miocene minor compressional deformation occurred in the retro-arc area and extended into the foreland area. This deformation event produced the closure of a short-lived intra-arc basin (Cura Mallín Basin, 25-15 Ma) at the innermost sector of the FTB. The Pliocene and Quaternary, between 37°30′ and 39°S, have been periods of relaxation of the inner part of the FTB and fossilization of the Agrio Fold and Thrust Belt. Localization of episodic late Oligocene-Ear ly Miocene and Pliocene to the present extensional structures in the intra- and inner retro-arc is controlled by pre-existing Jurassic half-grabens related to the formation of the Neuquén Basin. The Jurassic rift seems to be controlled by deep crustal-lithospheric discontinuities derived from a Proterozoic-Palaeozoic history of amalgamation in the area, now deeply buried under multiple episodes of Mesozoic-Tertiary synorogenic and synextensional sedimentation. © The Geological Society of London 2005. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v252_n_p37_Zapata http://hdl.handle.net/20.500.12110/paper_03058719_v252_n_p37_Zapata
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic basin evolution
fold and thrust belt
tectonic evolution
Argentina
Neuquen Basin
South America
Cura
Cura
spellingShingle basin evolution
fold and thrust belt
tectonic evolution
Argentina
Neuquen Basin
South America
Cura
Cura
Tectonic evolution of the Andean Fold and thrust belt of the southern Neuquén Basin, Argentina
topic_facet basin evolution
fold and thrust belt
tectonic evolution
Argentina
Neuquen Basin
South America
Cura
Cura
description The Andean Fold and Thrust belt between 36° and 39°S can be divided in two sectors. The Eastern Sector corresponds to the Agrio Fold and Thrust Belt (FTB) characterized by a major exhumation during the Late Cretaceous, and minor deformation during the late Eocene and Late Miocene. The Western Sector corresponds to the main cordillera and is characterized by a complex evolution that involves periods of out-of-sequence thrusting with respect to the previously deformed outer sector, and pulses of relaxation of the compressive structure. Cretaceous uplift constituted an orogenic wedge that extended to the inner sectors of the Agrio FTB. Eocene compression was mainly concentrated within the Western Sector but may have reactivated the pre-existing structures of the Agrio FTB, such as the Cordillera del Viento. Late Miocene minor compressional deformation occurred in the retro-arc area and extended into the foreland area. This deformation event produced the closure of a short-lived intra-arc basin (Cura Mallín Basin, 25-15 Ma) at the innermost sector of the FTB. The Pliocene and Quaternary, between 37°30′ and 39°S, have been periods of relaxation of the inner part of the FTB and fossilization of the Agrio Fold and Thrust Belt. Localization of episodic late Oligocene-Ear ly Miocene and Pliocene to the present extensional structures in the intra- and inner retro-arc is controlled by pre-existing Jurassic half-grabens related to the formation of the Neuquén Basin. The Jurassic rift seems to be controlled by deep crustal-lithospheric discontinuities derived from a Proterozoic-Palaeozoic history of amalgamation in the area, now deeply buried under multiple episodes of Mesozoic-Tertiary synorogenic and synextensional sedimentation. © The Geological Society of London 2005.
title Tectonic evolution of the Andean Fold and thrust belt of the southern Neuquén Basin, Argentina
title_short Tectonic evolution of the Andean Fold and thrust belt of the southern Neuquén Basin, Argentina
title_full Tectonic evolution of the Andean Fold and thrust belt of the southern Neuquén Basin, Argentina
title_fullStr Tectonic evolution of the Andean Fold and thrust belt of the southern Neuquén Basin, Argentina
title_full_unstemmed Tectonic evolution of the Andean Fold and thrust belt of the southern Neuquén Basin, Argentina
title_sort tectonic evolution of the andean fold and thrust belt of the southern neuquén basin, argentina
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v252_n_p37_Zapata
http://hdl.handle.net/20.500.12110/paper_03058719_v252_n_p37_Zapata
_version_ 1768546541376634880

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