Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications

Autores
Acocella, V.; Vezzoli, L.; Omarini, Ricardo Hector; Matteini, M.; Mazzuoli, R.
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Eastern Cordillera (Central Andes, ∼ 24°S) consists of a basement-involved thrust system, resulting from Miocene-Quaternary eastward migrating compression, separating the Puna plateau from the Santa Barbara System foreland. The inferred Tertiary strains arising from shortening in the Eastern Cordillera and Santa Barbara System are similar, higher than in the Puna. Slip data collected on the major ∼ N-S trending faults of Eastern Cordillera show a westward progression from dip-slip (contraction) to dextral and sinistral motions. This, consistently with established tectonic models, may result from partitioning due to the oblique Mio-Quaternary underthrusting of the Brazilian Shield north of 24°S. This strain partitioning has three main implications. (1) As the dextral and sinistral shear in the Eastern Cordillera are ∼ 62% and 29% of the compressive strain respectively, the Eastern Cordillera results more strained than Santa Barbara System foreland, contrary to previous estimates. (2) The partitioning in the Eastern Cordillera may find its counterpart in that to the west of the Central Andes, giving a possible structural symmetry to the Central Andes. (3) The easternmost N-S strike-slip structures in the Eastern Cordillera coincide with the easternmost Mio-Pliocene magmatic centres in the Central Andes, at ∼ 24°S. Provided that, further to the east, the crust is partially molten, the absence of magmatic centres may be explained by the presence of pure compressive structures in this portion of the Eastern Cordillera.
Fil: Acocella, V.. Università Roma Tre; Italia
Fil: Vezzoli, L.. Università degli studi dell'Insubria; Italia
Fil: Omarini, Ricardo Hector. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Matteini, M.. Universidade do Brasília; Brasil
Fil: Mazzuoli, R.. Università degli Studi di Pisa; Italia
Materia
Central Andes
Compressional Tectonics
Eastern Cordillera
Strain Partitioning
Strike-Slip Faulting
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/78825
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implicationsAcocella, V.Vezzoli, L.Omarini, Ricardo HectorMatteini, M.Mazzuoli, R.Central AndesCompressional TectonicsEastern CordilleraStrain PartitioningStrike-Slip Faultinghttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Eastern Cordillera (Central Andes, ∼ 24°S) consists of a basement-involved thrust system, resulting from Miocene-Quaternary eastward migrating compression, separating the Puna plateau from the Santa Barbara System foreland. The inferred Tertiary strains arising from shortening in the Eastern Cordillera and Santa Barbara System are similar, higher than in the Puna. Slip data collected on the major ∼ N-S trending faults of Eastern Cordillera show a westward progression from dip-slip (contraction) to dextral and sinistral motions. This, consistently with established tectonic models, may result from partitioning due to the oblique Mio-Quaternary underthrusting of the Brazilian Shield north of 24°S. This strain partitioning has three main implications. (1) As the dextral and sinistral shear in the Eastern Cordillera are ∼ 62% and 29% of the compressive strain respectively, the Eastern Cordillera results more strained than Santa Barbara System foreland, contrary to previous estimates. (2) The partitioning in the Eastern Cordillera may find its counterpart in that to the west of the Central Andes, giving a possible structural symmetry to the Central Andes. (3) The easternmost N-S strike-slip structures in the Eastern Cordillera coincide with the easternmost Mio-Pliocene magmatic centres in the Central Andes, at ∼ 24°S. Provided that, further to the east, the crust is partially molten, the absence of magmatic centres may be explained by the presence of pure compressive structures in this portion of the Eastern Cordillera.Fil: Acocella, V.. Università Roma Tre; ItaliaFil: Vezzoli, L.. Università degli studi dell'Insubria; ItaliaFil: Omarini, Ricardo Hector. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Matteini, M.. Universidade do Brasília; BrasilFil: Mazzuoli, R.. Università degli Studi di Pisa; ItaliaElsevier Science2007-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/78825Acocella, V.; Vezzoli, L.; Omarini, Ricardo Hector; Matteini, M.; Mazzuoli, R.; Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications; Elsevier Science; Tectonophysics; 434; 1-4; 4-2007; 81-920040-1951CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2007.02.001info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0040195107000522?via%3Dihubinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:49:07Zoai:ri.conicet.gov.ar:11336/78825instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:49:08.164CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications
title Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications
spellingShingle Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications
Acocella, V.
Central Andes
Compressional Tectonics
Eastern Cordillera
Strain Partitioning
Strike-Slip Faulting
title_short Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications
title_full Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications
title_fullStr Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications
title_full_unstemmed Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications
title_sort Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications
dc.creator.none.fl_str_mv Acocella, V.
Vezzoli, L.
Omarini, Ricardo Hector
Matteini, M.
Mazzuoli, R.
author Acocella, V.
author_facet Acocella, V.
Vezzoli, L.
Omarini, Ricardo Hector
Matteini, M.
Mazzuoli, R.
author_role author
author2 Vezzoli, L.
Omarini, Ricardo Hector
Matteini, M.
Mazzuoli, R.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Central Andes
Compressional Tectonics
Eastern Cordillera
Strain Partitioning
Strike-Slip Faulting
topic Central Andes
Compressional Tectonics
Eastern Cordillera
Strain Partitioning
Strike-Slip Faulting
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Eastern Cordillera (Central Andes, ∼ 24°S) consists of a basement-involved thrust system, resulting from Miocene-Quaternary eastward migrating compression, separating the Puna plateau from the Santa Barbara System foreland. The inferred Tertiary strains arising from shortening in the Eastern Cordillera and Santa Barbara System are similar, higher than in the Puna. Slip data collected on the major ∼ N-S trending faults of Eastern Cordillera show a westward progression from dip-slip (contraction) to dextral and sinistral motions. This, consistently with established tectonic models, may result from partitioning due to the oblique Mio-Quaternary underthrusting of the Brazilian Shield north of 24°S. This strain partitioning has three main implications. (1) As the dextral and sinistral shear in the Eastern Cordillera are ∼ 62% and 29% of the compressive strain respectively, the Eastern Cordillera results more strained than Santa Barbara System foreland, contrary to previous estimates. (2) The partitioning in the Eastern Cordillera may find its counterpart in that to the west of the Central Andes, giving a possible structural symmetry to the Central Andes. (3) The easternmost N-S strike-slip structures in the Eastern Cordillera coincide with the easternmost Mio-Pliocene magmatic centres in the Central Andes, at ∼ 24°S. Provided that, further to the east, the crust is partially molten, the absence of magmatic centres may be explained by the presence of pure compressive structures in this portion of the Eastern Cordillera.
Fil: Acocella, V.. Università Roma Tre; Italia
Fil: Vezzoli, L.. Università degli studi dell'Insubria; Italia
Fil: Omarini, Ricardo Hector. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Matteini, M.. Universidade do Brasília; Brasil
Fil: Mazzuoli, R.. Università degli Studi di Pisa; Italia
description The Eastern Cordillera (Central Andes, ∼ 24°S) consists of a basement-involved thrust system, resulting from Miocene-Quaternary eastward migrating compression, separating the Puna plateau from the Santa Barbara System foreland. The inferred Tertiary strains arising from shortening in the Eastern Cordillera and Santa Barbara System are similar, higher than in the Puna. Slip data collected on the major ∼ N-S trending faults of Eastern Cordillera show a westward progression from dip-slip (contraction) to dextral and sinistral motions. This, consistently with established tectonic models, may result from partitioning due to the oblique Mio-Quaternary underthrusting of the Brazilian Shield north of 24°S. This strain partitioning has three main implications. (1) As the dextral and sinistral shear in the Eastern Cordillera are ∼ 62% and 29% of the compressive strain respectively, the Eastern Cordillera results more strained than Santa Barbara System foreland, contrary to previous estimates. (2) The partitioning in the Eastern Cordillera may find its counterpart in that to the west of the Central Andes, giving a possible structural symmetry to the Central Andes. (3) The easternmost N-S strike-slip structures in the Eastern Cordillera coincide with the easternmost Mio-Pliocene magmatic centres in the Central Andes, at ∼ 24°S. Provided that, further to the east, the crust is partially molten, the absence of magmatic centres may be explained by the presence of pure compressive structures in this portion of the Eastern Cordillera.
publishDate 2007
dc.date.none.fl_str_mv 2007-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/78825
Acocella, V.; Vezzoli, L.; Omarini, Ricardo Hector; Matteini, M.; Mazzuoli, R.; Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications; Elsevier Science; Tectonophysics; 434; 1-4; 4-2007; 81-92
0040-1951
CONICET Digital
CONICET
url http://hdl.handle.net/11336/78825
identifier_str_mv Acocella, V.; Vezzoli, L.; Omarini, Ricardo Hector; Matteini, M.; Mazzuoli, R.; Kinematic variations across Eastern Cordillera at 24°S (Central Andes): tectonic and magmatic implications; Elsevier Science; Tectonophysics; 434; 1-4; 4-2007; 81-92
0040-1951
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2007.02.001
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0040195107000522?via%3Dihub
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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