Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?

Early Paleozoic paleomagnetic data from NW Argentina and Northern Chile have shown large systematic rotations within two domains: one composed of the Western Puna that yields very large (up to 80°) counter-clockwise rotations, and the other formed by the Famatina Ranges and the Eastern Puna that sho...

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Detalhes bibliográficos
Autores: Spagnuolo, Cecilia Mariel, Rapalini, Augusto Ernesto, Astini, Ricardo Alfredo
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/68805
Acesso em linha:http://hdl.handle.net/11336/68805
Access Level:acceso abierto
Palavra-chave:Block Rotations
Gondwana
Nw Argentina
Paleomagnetism
Paleozoic
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
id AR_b78025d3ccf9fff6a4e97198b5c373d0
oai_identifier_str oai:ri.conicet.gov.ar:11336/68805
network_acronym_str AR
network_name_str Argentina
repository_id_str
dc.title.none.fl_str_mv Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?
title Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?
spellingShingle Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?
Spagnuolo, Cecilia Mariel
Block Rotations
Gondwana
Nw Argentina
Paleomagnetism
Paleozoic
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?
title_full Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?
title_fullStr Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?
title_full_unstemmed Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?
title_sort Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?
dc.creator.none.fl_str_mv Spagnuolo, Cecilia Mariel
Rapalini, Augusto Ernesto
Astini, Ricardo Alfredo
author Spagnuolo, Cecilia Mariel
author_facet Spagnuolo, Cecilia Mariel
Rapalini, Augusto Ernesto
Astini, Ricardo Alfredo
author_role author
author2 Rapalini, Augusto Ernesto
Astini, Ricardo Alfredo
author2_role author
author
dc.subject.none.fl_str_mv Block Rotations
Gondwana
Nw Argentina
Paleomagnetism
Paleozoic
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic Block Rotations
Gondwana
Nw Argentina
Paleomagnetism
Paleozoic
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description Early Paleozoic paleomagnetic data from NW Argentina and Northern Chile have shown large systematic rotations within two domains: one composed of the Western Puna that yields very large (up to 80°) counter-clockwise rotations, and the other formed by the Famatina Ranges and the Eastern Puna that shows (~40°) clockwise rotations around vertical axes. In several locations, lack of significant rotations in younger rocks constrains this kinematic pattern to have occurred during the Paleozoic. Previous tectonic models have explained these rotations as indicative of rigid-body rotations of large para-autochthonous crustal blocks or terranes. A different but simple tectonic model that accounts for this pattern is presented in which rotations are associated to crustal shortening and tectonic escape due to the collision of the allochthonous terrane of Precordillera in the Late Ordovician. This collision should have generated dextral shear zones in the back arc region of the convergent SW Gondwana margin, where systematic domino-like clockwise rotations of small crustal blocks accommodate crustal shortening. The Western Puna block, bordering the Precordillera terrane to the north, might have rotated counterclockwise as an independent microplate due to tectonic escape processes, in a fashion similar to the present-day relationship between the Anatolia block and the Arabian microplate.
publishDate 2011
dc.date.none.fl_str_mv 2011-04
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/11336/68805
Spagnuolo, Cecilia Mariel; Rapalini, Augusto Ernesto; Astini, Ricardo Alfredo; Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?; Springer; International Journal of Earth Sciences; 100; 2; 4-2011; 603-618
1437-3254
CONICET Digital
CONICET
url http://hdl.handle.net/11336/68805
identifier_str_mv Spagnuolo, Cecilia Mariel; Rapalini, Augusto Ernesto; Astini, Ricardo Alfredo; Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?; Springer; International Journal of Earth Sciences; 100; 2; 4-2011; 603-618
1437-3254
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/s00531-010-0578-2
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs00531-010-0578-2
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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
_version_ 1799195561261268992
spelling Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?Spagnuolo, Cecilia MarielRapalini, Augusto ErnestoAstini, Ricardo AlfredoBlock RotationsGondwanaNw ArgentinaPaleomagnetismPaleozoichttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Early Paleozoic paleomagnetic data from NW Argentina and Northern Chile have shown large systematic rotations within two domains: one composed of the Western Puna that yields very large (up to 80°) counter-clockwise rotations, and the other formed by the Famatina Ranges and the Eastern Puna that shows (~40°) clockwise rotations around vertical axes. In several locations, lack of significant rotations in younger rocks constrains this kinematic pattern to have occurred during the Paleozoic. Previous tectonic models have explained these rotations as indicative of rigid-body rotations of large para-autochthonous crustal blocks or terranes. A different but simple tectonic model that accounts for this pattern is presented in which rotations are associated to crustal shortening and tectonic escape due to the collision of the allochthonous terrane of Precordillera in the Late Ordovician. This collision should have generated dextral shear zones in the back arc region of the convergent SW Gondwana margin, where systematic domino-like clockwise rotations of small crustal blocks accommodate crustal shortening. The Western Puna block, bordering the Precordillera terrane to the north, might have rotated counterclockwise as an independent microplate due to tectonic escape processes, in a fashion similar to the present-day relationship between the Anatolia block and the Arabian microplate.Fil: Spagnuolo, Cecilia Mariel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Miguel Lillo. Dirección de Geología. Instituto de Sedimentología; ArgentinaFil: Rapalini, Augusto Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; ArgentinaFil: Astini, Ricardo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología Básica y Aplicada. Laboratorio de Análisis de Cuencas; ArgentinaSpringer2011-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/68805Spagnuolo, Cecilia Mariel; Rapalini, Augusto Ernesto; Astini, Ricardo Alfredo; Reinterpretation of the Ordovician rotations in NW Argentina and Northern Chile: A consequence of the Precordillera collision?; Springer; International Journal of Earth Sciences; 100; 2; 4-2011; 603-6181437-3254CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s00531-010-0578-2info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs00531-010-0578-2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:56:20Zoai:ri.conicet.gov.ar:11336/68805instacron: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:34982024-05-08 13:56:20.663CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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