Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc

Autores
Coira, Beatriz Lidia Luisa; Kirschbaum, Alicia Matilde; Hongn, Fernando Daniel; Pérez, Belén; Menegatti, Nilda Dina
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Two main groups of basic rocks, representative of the bimodal Ordovician magmatism of the northeastern Puna (22-24°S, 66°30'-65°40'W) were revisited on the basis of new geological, petrographic and geochemical data. One of them shows geochemical characteristics intermediate between those of MORB and arc-type basalts common in back-arc basins. The other group is represented by low and high Ti basalts and gabbros with an OIB-type signature. Basalts of the first group (Tremadocian-early Arenigian) along with minor dacites are found within a sedimentary-volcanic sequence that hosts the Cobres and the Tanque granitic plutons (475-480 Ma). This group of basic rocks is also coeval with Cobres Granite, whereas magmas with OIB-type signature were contemporary with the emplacement of Tanque Granite. During the early to middle Arenigian, dacites and minor amounts of basalts with OIB-type signatures erupted in the Escaya-Huancar ranges and were intruded as dikes in Cobres and Tanque ranges. Two main stages are recorded in the tectono-magmatic evolution of the region. The first stage was dominated by extension (Tremadocian-early Arenigian), and the second (until the late Arenigian) during which extensional and contractional conditions occurred diachronously along the basin. The geochemical characteristics of the basic magmas are attributed to a combination of factors such as variably depleted mantle sources, continental crustal contamination and addition of subduction components, as well as variations in the degree of melting in the sources. These factors probably were controlled by episodical changes both in time and space in the extensional conditions. These characteristics altogether indicate a back-arc setting for the northeastern Puna during Early and Middle Ordovician, in which contractional episodes took place.
Fil: Coira, Beatriz Lidia Luisa. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jujuy; Argentina
Fil: Kirschbaum, Alicia Matilde. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina
Fil: Hongn, Fernando Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina
Fil: Pérez, Belén. Universidad Nacional de Jujuy; Argentina
Fil: Menegatti, Nilda Dina. Universidad Nacional de Salta; Argentina
Materia
ARGENTINA
BACK-ARC MAGMATISM
EXTENSIONAL-CONTRACTIONAL EPISODES
NORTHEASTERN PUNA
ORDOVICIAN
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:11336/53851
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/53851
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arcCoira, Beatriz Lidia LuisaKirschbaum, Alicia MatildeHongn, Fernando DanielPérez, BelénMenegatti, Nilda DinaARGENTINABACK-ARC MAGMATISMEXTENSIONAL-CONTRACTIONAL EPISODESNORTHEASTERN PUNAORDOVICIANhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Two main groups of basic rocks, representative of the bimodal Ordovician magmatism of the northeastern Puna (22-24°S, 66°30'-65°40'W) were revisited on the basis of new geological, petrographic and geochemical data. One of them shows geochemical characteristics intermediate between those of MORB and arc-type basalts common in back-arc basins. The other group is represented by low and high Ti basalts and gabbros with an OIB-type signature. Basalts of the first group (Tremadocian-early Arenigian) along with minor dacites are found within a sedimentary-volcanic sequence that hosts the Cobres and the Tanque granitic plutons (475-480 Ma). This group of basic rocks is also coeval with Cobres Granite, whereas magmas with OIB-type signature were contemporary with the emplacement of Tanque Granite. During the early to middle Arenigian, dacites and minor amounts of basalts with OIB-type signatures erupted in the Escaya-Huancar ranges and were intruded as dikes in Cobres and Tanque ranges. Two main stages are recorded in the tectono-magmatic evolution of the region. The first stage was dominated by extension (Tremadocian-early Arenigian), and the second (until the late Arenigian) during which extensional and contractional conditions occurred diachronously along the basin. The geochemical characteristics of the basic magmas are attributed to a combination of factors such as variably depleted mantle sources, continental crustal contamination and addition of subduction components, as well as variations in the degree of melting in the sources. These factors probably were controlled by episodical changes both in time and space in the extensional conditions. These characteristics altogether indicate a back-arc setting for the northeastern Puna during Early and Middle Ordovician, in which contractional episodes took place.Fil: Coira, Beatriz Lidia Luisa. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jujuy; ArgentinaFil: Kirschbaum, Alicia Matilde. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; ArgentinaFil: Hongn, Fernando Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; ArgentinaFil: Pérez, Belén. Universidad Nacional de Jujuy; ArgentinaFil: Menegatti, Nilda Dina. Universidad Nacional de Salta; ArgentinaPergamon-Elsevier Science Ltd2009-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/53851Coira, Beatriz Lidia Luisa; Kirschbaum, Alicia Matilde; Hongn, Fernando Daniel; Pérez, Belén; Menegatti, Nilda Dina; Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 28; 4; 12-2009; 374-3820895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2009.04.007info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981109000650info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:40:38Zoai:ri.conicet.gov.ar:11336/53851instacron: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 09:40:39.091CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc
title Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc
spellingShingle Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc
Coira, Beatriz Lidia Luisa
ARGENTINA
BACK-ARC MAGMATISM
EXTENSIONAL-CONTRACTIONAL EPISODES
NORTHEASTERN PUNA
ORDOVICIAN
title_short Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc
title_full Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc
title_fullStr Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc
title_full_unstemmed Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc
title_sort Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc
dc.creator.none.fl_str_mv Coira, Beatriz Lidia Luisa
Kirschbaum, Alicia Matilde
Hongn, Fernando Daniel
Pérez, Belén
Menegatti, Nilda Dina
author Coira, Beatriz Lidia Luisa
author_facet Coira, Beatriz Lidia Luisa
Kirschbaum, Alicia Matilde
Hongn, Fernando Daniel
Pérez, Belén
Menegatti, Nilda Dina
author_role author
author2 Kirschbaum, Alicia Matilde
Hongn, Fernando Daniel
Pérez, Belén
Menegatti, Nilda Dina
author2_role author
author
author
author
dc.subject.none.fl_str_mv ARGENTINA
BACK-ARC MAGMATISM
EXTENSIONAL-CONTRACTIONAL EPISODES
NORTHEASTERN PUNA
ORDOVICIAN
topic ARGENTINA
BACK-ARC MAGMATISM
EXTENSIONAL-CONTRACTIONAL EPISODES
NORTHEASTERN PUNA
ORDOVICIAN
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Two main groups of basic rocks, representative of the bimodal Ordovician magmatism of the northeastern Puna (22-24°S, 66°30'-65°40'W) were revisited on the basis of new geological, petrographic and geochemical data. One of them shows geochemical characteristics intermediate between those of MORB and arc-type basalts common in back-arc basins. The other group is represented by low and high Ti basalts and gabbros with an OIB-type signature. Basalts of the first group (Tremadocian-early Arenigian) along with minor dacites are found within a sedimentary-volcanic sequence that hosts the Cobres and the Tanque granitic plutons (475-480 Ma). This group of basic rocks is also coeval with Cobres Granite, whereas magmas with OIB-type signature were contemporary with the emplacement of Tanque Granite. During the early to middle Arenigian, dacites and minor amounts of basalts with OIB-type signatures erupted in the Escaya-Huancar ranges and were intruded as dikes in Cobres and Tanque ranges. Two main stages are recorded in the tectono-magmatic evolution of the region. The first stage was dominated by extension (Tremadocian-early Arenigian), and the second (until the late Arenigian) during which extensional and contractional conditions occurred diachronously along the basin. The geochemical characteristics of the basic magmas are attributed to a combination of factors such as variably depleted mantle sources, continental crustal contamination and addition of subduction components, as well as variations in the degree of melting in the sources. These factors probably were controlled by episodical changes both in time and space in the extensional conditions. These characteristics altogether indicate a back-arc setting for the northeastern Puna during Early and Middle Ordovician, in which contractional episodes took place.
Fil: Coira, Beatriz Lidia Luisa. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Jujuy; Argentina
Fil: Kirschbaum, Alicia Matilde. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina
Fil: Hongn, Fernando Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina
Fil: Pérez, Belén. Universidad Nacional de Jujuy; Argentina
Fil: Menegatti, Nilda Dina. Universidad Nacional de Salta; Argentina
description Two main groups of basic rocks, representative of the bimodal Ordovician magmatism of the northeastern Puna (22-24°S, 66°30'-65°40'W) were revisited on the basis of new geological, petrographic and geochemical data. One of them shows geochemical characteristics intermediate between those of MORB and arc-type basalts common in back-arc basins. The other group is represented by low and high Ti basalts and gabbros with an OIB-type signature. Basalts of the first group (Tremadocian-early Arenigian) along with minor dacites are found within a sedimentary-volcanic sequence that hosts the Cobres and the Tanque granitic plutons (475-480 Ma). This group of basic rocks is also coeval with Cobres Granite, whereas magmas with OIB-type signature were contemporary with the emplacement of Tanque Granite. During the early to middle Arenigian, dacites and minor amounts of basalts with OIB-type signatures erupted in the Escaya-Huancar ranges and were intruded as dikes in Cobres and Tanque ranges. Two main stages are recorded in the tectono-magmatic evolution of the region. The first stage was dominated by extension (Tremadocian-early Arenigian), and the second (until the late Arenigian) during which extensional and contractional conditions occurred diachronously along the basin. The geochemical characteristics of the basic magmas are attributed to a combination of factors such as variably depleted mantle sources, continental crustal contamination and addition of subduction components, as well as variations in the degree of melting in the sources. These factors probably were controlled by episodical changes both in time and space in the extensional conditions. These characteristics altogether indicate a back-arc setting for the northeastern Puna during Early and Middle Ordovician, in which contractional episodes took place.
publishDate 2009
dc.date.none.fl_str_mv 2009-12
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/11336/53851
Coira, Beatriz Lidia Luisa; Kirschbaum, Alicia Matilde; Hongn, Fernando Daniel; Pérez, Belén; Menegatti, Nilda Dina; Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 28; 4; 12-2009; 374-382
0895-9811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/53851
identifier_str_mv Coira, Beatriz Lidia Luisa; Kirschbaum, Alicia Matilde; Hongn, Fernando Daniel; Pérez, Belén; Menegatti, Nilda Dina; Basic magmatism in northeastern Puna, Argentina: Chemical composition and tectonic setting in the Ordovician back-arc; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 28; 4; 12-2009; 374-382
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/doi/10.1016/j.jsames.2009.04.007
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981109000650
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
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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score 13.070432

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