Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting

Autores
Coira, Beatriz Lidia Luisa; Koukharsky, Magdalena Maria L.; Rivero Guevara, S.; Cisterna, Clara Eugenia
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Geochemical characteristics of Ordovician basic volcanic rocks help to define the evolving tectonic setting of the Argentine Puna and northern Chile. Four spatially distinct magmatic groups are defined on geological, petrographical, geochemical and isotopic bases, each associated with particular geodynamic environments. The Tremadoc western group of subalkaline low K tholeiites with arc and modified MORB like signatures represent early stages of a back-arc basin, where spreading was incipient. The Arenig western group, medium K calc-alkaline basalts to andesites have volcanic arc in transition to back-arc signatures. The Tremadoc subalkaline basalts of the eastern group have REE patterns similar to E-MORB and at the same time weak subduction characteristics suggesting a rather mature supra-subduction zone (SSZ) basin. In contrast, the Late Tremadocian-Arenig basalts of the same group have intra-plate signatures, interpreted as magmas that ascended along pull apart regions associated with a transtensional regime. The geochemical patterns were applied to correlate basic sequences of doubtful geological setting. So, basalts from Chile were related to the Tremadocian western group, where they represent a slightly more mature stage of spreading of the basin. Basic rocks from Pocitos and part of Calalaste represent pre-Ordovician records of a back-arc system similar to that of the Tremadoc western group. Clearly similar arc patterns to those of the Arenig western group allow extending the arc environment to the southern Puna. The Tremadocian basalts from the eastern group were related to metabasites from the southern Puna, as part of a back-arc environment at that time.
Fil: Coira, Beatriz Lidia Luisa. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jujuy; Argentina
Fil: Koukharsky, Magdalena Maria L.. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
Fil: Rivero Guevara, S.. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Cisterna, Clara Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina
Materia
Argentina
Basic Magmatism
Northern Chile
Ordovician
Puna
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/78067
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/78067
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic settingCoira, Beatriz Lidia LuisaKoukharsky, Magdalena Maria L.Rivero Guevara, S.Cisterna, Clara EugeniaArgentinaBasic MagmatismNorthern ChileOrdovicianPunahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Geochemical characteristics of Ordovician basic volcanic rocks help to define the evolving tectonic setting of the Argentine Puna and northern Chile. Four spatially distinct magmatic groups are defined on geological, petrographical, geochemical and isotopic bases, each associated with particular geodynamic environments. The Tremadoc western group of subalkaline low K tholeiites with arc and modified MORB like signatures represent early stages of a back-arc basin, where spreading was incipient. The Arenig western group, medium K calc-alkaline basalts to andesites have volcanic arc in transition to back-arc signatures. The Tremadoc subalkaline basalts of the eastern group have REE patterns similar to E-MORB and at the same time weak subduction characteristics suggesting a rather mature supra-subduction zone (SSZ) basin. In contrast, the Late Tremadocian-Arenig basalts of the same group have intra-plate signatures, interpreted as magmas that ascended along pull apart regions associated with a transtensional regime. The geochemical patterns were applied to correlate basic sequences of doubtful geological setting. So, basalts from Chile were related to the Tremadocian western group, where they represent a slightly more mature stage of spreading of the basin. Basic rocks from Pocitos and part of Calalaste represent pre-Ordovician records of a back-arc system similar to that of the Tremadoc western group. Clearly similar arc patterns to those of the Arenig western group allow extending the arc environment to the southern Puna. The Tremadocian basalts from the eastern group were related to metabasites from the southern Puna, as part of a back-arc environment at that time.Fil: Coira, Beatriz Lidia Luisa. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jujuy; ArgentinaFil: Koukharsky, Magdalena Maria L.. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; ArgentinaFil: Rivero Guevara, S.. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Cisterna, Clara Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; ArgentinaPergamon-Elsevier Science Ltd2009-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/78067Coira, Beatriz Lidia Luisa; Koukharsky, Magdalena Maria L.; Rivero Guevara, S.; Cisterna, Clara Eugenia; Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 27; 1; 2-2009; 24-350895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981108000965info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2008.10.002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:36:13Zoai:ri.conicet.gov.ar:11336/78067instacron: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:34982025-09-29 09:36:13.302CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting
title Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting
spellingShingle Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting
Coira, Beatriz Lidia Luisa
Argentina
Basic Magmatism
Northern Chile
Ordovician
Puna
title_short Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting
title_full Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting
title_fullStr Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting
title_full_unstemmed Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting
title_sort Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting
dc.creator.none.fl_str_mv Coira, Beatriz Lidia Luisa
Koukharsky, Magdalena Maria L.
Rivero Guevara, S.
Cisterna, Clara Eugenia
author Coira, Beatriz Lidia Luisa
author_facet Coira, Beatriz Lidia Luisa
Koukharsky, Magdalena Maria L.
Rivero Guevara, S.
Cisterna, Clara Eugenia
author_role author
author2 Koukharsky, Magdalena Maria L.
Rivero Guevara, S.
Cisterna, Clara Eugenia
author2_role author
author
author
dc.subject.none.fl_str_mv Argentina
Basic Magmatism
Northern Chile
Ordovician
Puna
topic Argentina
Basic Magmatism
Northern Chile
Ordovician
Puna
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Geochemical characteristics of Ordovician basic volcanic rocks help to define the evolving tectonic setting of the Argentine Puna and northern Chile. Four spatially distinct magmatic groups are defined on geological, petrographical, geochemical and isotopic bases, each associated with particular geodynamic environments. The Tremadoc western group of subalkaline low K tholeiites with arc and modified MORB like signatures represent early stages of a back-arc basin, where spreading was incipient. The Arenig western group, medium K calc-alkaline basalts to andesites have volcanic arc in transition to back-arc signatures. The Tremadoc subalkaline basalts of the eastern group have REE patterns similar to E-MORB and at the same time weak subduction characteristics suggesting a rather mature supra-subduction zone (SSZ) basin. In contrast, the Late Tremadocian-Arenig basalts of the same group have intra-plate signatures, interpreted as magmas that ascended along pull apart regions associated with a transtensional regime. The geochemical patterns were applied to correlate basic sequences of doubtful geological setting. So, basalts from Chile were related to the Tremadocian western group, where they represent a slightly more mature stage of spreading of the basin. Basic rocks from Pocitos and part of Calalaste represent pre-Ordovician records of a back-arc system similar to that of the Tremadoc western group. Clearly similar arc patterns to those of the Arenig western group allow extending the arc environment to the southern Puna. The Tremadocian basalts from the eastern group were related to metabasites from the southern Puna, as part of a back-arc environment at that time.
Fil: Coira, Beatriz Lidia Luisa. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jujuy; Argentina
Fil: Koukharsky, Magdalena Maria L.. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
Fil: Rivero Guevara, S.. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Cisterna, Clara Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina
description Geochemical characteristics of Ordovician basic volcanic rocks help to define the evolving tectonic setting of the Argentine Puna and northern Chile. Four spatially distinct magmatic groups are defined on geological, petrographical, geochemical and isotopic bases, each associated with particular geodynamic environments. The Tremadoc western group of subalkaline low K tholeiites with arc and modified MORB like signatures represent early stages of a back-arc basin, where spreading was incipient. The Arenig western group, medium K calc-alkaline basalts to andesites have volcanic arc in transition to back-arc signatures. The Tremadoc subalkaline basalts of the eastern group have REE patterns similar to E-MORB and at the same time weak subduction characteristics suggesting a rather mature supra-subduction zone (SSZ) basin. In contrast, the Late Tremadocian-Arenig basalts of the same group have intra-plate signatures, interpreted as magmas that ascended along pull apart regions associated with a transtensional regime. The geochemical patterns were applied to correlate basic sequences of doubtful geological setting. So, basalts from Chile were related to the Tremadocian western group, where they represent a slightly more mature stage of spreading of the basin. Basic rocks from Pocitos and part of Calalaste represent pre-Ordovician records of a back-arc system similar to that of the Tremadoc western group. Clearly similar arc patterns to those of the Arenig western group allow extending the arc environment to the southern Puna. The Tremadocian basalts from the eastern group were related to metabasites from the southern Puna, as part of a back-arc environment at that time.
publishDate 2009
dc.date.none.fl_str_mv 2009-02
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/11336/78067
Coira, Beatriz Lidia Luisa; Koukharsky, Magdalena Maria L.; Rivero Guevara, S.; Cisterna, Clara Eugenia; Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 27; 1; 2-2009; 24-35
0895-9811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/78067
identifier_str_mv Coira, Beatriz Lidia Luisa; Koukharsky, Magdalena Maria L.; Rivero Guevara, S.; Cisterna, Clara Eugenia; Puna (Argentina) and northern Chile Ordovician basic magmatism: A contribution to the tectonic setting; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 27; 1; 2-2009; 24-35
0895-9811
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981108000965
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2008.10.002
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
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
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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