Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina)

The eastern Andean orogenic front at 36°S shows unique attributes when compared to neighbor segments, from an anomalous eastward development of the orogenic front area due to the uplift of a zone of reduced topography in the foothills constituting a pre-Andean belt, to the occurrence of great Late O...

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Autores principales:	Álvarez Cerimedo, J., Orts, D., Rojas Vera, E., Folguera, A., Bottesi, G., Ramos, V.A.
Formato:	JOUR
Materias:	Brittle-ductile transitions Foreland basin Malargüe fold and thrust belt Orogenic front Southern central Andes Tectonic inversion brittle deformation ductile deformation exhumation extensional tectonics fold and thrust belt foreland basin Miocene normal fault Oligocene orogenic belt orogeny tectonic evolution Andes Argentina Malargue Mendoza
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_07187092_v40_n3_p504_AlvarezCerimedo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_07187092_v40_n3_p504_AlvarezCerimedo
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spelling	todo:paper_07187092_v40_n3_p504_AlvarezCerimedo2023-10-03T15:36:41Z Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina) Álvarez Cerimedo, J. Orts, D. Rojas Vera, E. Folguera, A. Bottesi, G. Ramos, V.A. Brittle-ductile transitions Foreland basin Malargüe fold and thrust belt Orogenic front Southern central Andes Tectonic inversion brittle deformation ductile deformation exhumation extensional tectonics fold and thrust belt foreland basin Miocene normal fault Oligocene orogenic belt orogeny tectonic evolution Andes Argentina Malargue Mendoza The eastern Andean orogenic front at 36°S shows unique attributes when compared to neighbor segments, from an anomalous eastward development of the orogenic front area due to the uplift of a zone of reduced topography in the foothills constituting a pre-Andean belt, to the occurrence of great Late Oligocene to Early Miocene within-plate series. The study of this eastern pre-Andean belt from extensive field mapping and analysis of seismic lines reveals a complex evolution that encompasses a pre-Late Oligocene stage of exhumation prior to the Late Oligocene-Miocene within-plate volcanic products which are coetaneous with an extensional relaxation phase, and one last period of contractional deformation that uplifted the pre-Andean sector in Miocene times. This last stage of orogenic construction is associated with synorogenic strata that show coarsening up sedimentary cycles with an eastward provenance. Contractional mechanisms involved deep ramps rooted into the basement, some of which are linked to inverted Late Oligocene-Miocene normal faults, to shallower detachments located in the Upper Cretaceous and Miocene incompetent layers. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07187092_v40_n3_p504_AlvarezCerimedo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Brittle-ductile transitions Foreland basin Malargüe fold and thrust belt Orogenic front Southern central Andes Tectonic inversion brittle deformation ductile deformation exhumation extensional tectonics fold and thrust belt foreland basin Miocene normal fault Oligocene orogenic belt orogeny tectonic evolution Andes Argentina Malargue Mendoza
spellingShingle	Brittle-ductile transitions Foreland basin Malargüe fold and thrust belt Orogenic front Southern central Andes Tectonic inversion brittle deformation ductile deformation exhumation extensional tectonics fold and thrust belt foreland basin Miocene normal fault Oligocene orogenic belt orogeny tectonic evolution Andes Argentina Malargue Mendoza Álvarez Cerimedo, J. Orts, D. Rojas Vera, E. Folguera, A. Bottesi, G. Ramos, V.A. Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina)
topic_facet	Brittle-ductile transitions Foreland basin Malargüe fold and thrust belt Orogenic front Southern central Andes Tectonic inversion brittle deformation ductile deformation exhumation extensional tectonics fold and thrust belt foreland basin Miocene normal fault Oligocene orogenic belt orogeny tectonic evolution Andes Argentina Malargue Mendoza
description	The eastern Andean orogenic front at 36°S shows unique attributes when compared to neighbor segments, from an anomalous eastward development of the orogenic front area due to the uplift of a zone of reduced topography in the foothills constituting a pre-Andean belt, to the occurrence of great Late Oligocene to Early Miocene within-plate series. The study of this eastern pre-Andean belt from extensive field mapping and analysis of seismic lines reveals a complex evolution that encompasses a pre-Late Oligocene stage of exhumation prior to the Late Oligocene-Miocene within-plate volcanic products which are coetaneous with an extensional relaxation phase, and one last period of contractional deformation that uplifted the pre-Andean sector in Miocene times. This last stage of orogenic construction is associated with synorogenic strata that show coarsening up sedimentary cycles with an eastward provenance. Contractional mechanisms involved deep ramps rooted into the basement, some of which are linked to inverted Late Oligocene-Miocene normal faults, to shallower detachments located in the Upper Cretaceous and Miocene incompetent layers.
format	JOUR
author	Álvarez Cerimedo, J. Orts, D. Rojas Vera, E. Folguera, A. Bottesi, G. Ramos, V.A.
author_facet	Álvarez Cerimedo, J. Orts, D. Rojas Vera, E. Folguera, A. Bottesi, G. Ramos, V.A.
author_sort	Álvarez Cerimedo, J.
title	Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina)
title_short	Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina)
title_full	Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina)
title_fullStr	Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina)
title_full_unstemmed	Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina)
title_sort	mechanisms and deformational stages at the eastern andean front (36°s, argentina)
url	http://hdl.handle.net/20.500.12110/paper_07187092_v40_n3_p504_AlvarezCerimedo
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Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina)

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