Hybridization between I-type and S-type granites in the Ordovician Famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina

In the Tafí del Valle region, in northwestern Argentina, several intrusive bodies of lower Paleozoic age are emplaced in a low to medium metamorphic grade basement, owing to the Sierras Pampeanas. The plutonic complexes called El Infiernillo, La Ovejería, Loma Pelada and Los Cuartos have been previo...

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Detalles Bibliográficos
Autores: López, J. P., Bellos, L. I., Díaz Alvarado, Juan, Castro Dorado, Antonio
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:español
OAI Identifier:oai:ariasmontano.uhu.es:10272/14848
Acceso en línea:http://hdl.handle.net/10272/14848
Access Level:acceso abierto
Palabra clave:Hybridization
Lower Paleozoic
Sierras Pampeanas
Tafí del Valle
La Ovejería pluton
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spelling Hybridization between I-type and S-type granites in the Ordovician Famatinian magmatic arc, Tafí del Valle, Tucumán, NW ArgentinaLópez, J. P.Bellos, L. I.Díaz Alvarado, JuanCastro Dorado, AntonioHybridizationLower PaleozoicSierras PampeanasTafí del ValleLa Ovejería plutonIn the Tafí del Valle region, in northwestern Argentina, several intrusive bodies of lower Paleozoic age are emplaced in a low to medium metamorphic grade basement, owing to the Sierras Pampeanas. The plutonic complexes called El Infiernillo, La Ovejería, Loma Pelada and Los Cuartos have been previously included in regional descriptive compilations. In this study, new trace element analyses of these intrusive granitoids are presented and added to the geochemical background in order to constrain the main petrological and geochemical characteristics of the lower Paleozoic magmatism in the Tafí del Valle region.Most of the studied intrusive granitoids show calc-alkaline geochemical signatures and are moderately to strongly peraluminous. They can be grouped into three main groups: 1) La Ovejería and El Infiernillo samples present cotectic evolutions that match those trends traced for Cpx + Pl fractionation and similar to the regional calc-alkaline systems used for comparison, at least in the less evolved tonalites and granodiorites. 2) A second group is composed of some granitoids from Loma Pelada and Los Cuartos plutons, which present very evolved compositions with low percentage of CaO and MgO. These granitoids are placed in the compositional range of S type magmas described in the region, trending to the location of the host rocks with increasing peraluminosity. 3) The third group is comprised by the samples of Loma Pelada and Los Cuartos intrusive units that show intermediate geochemical characteristics between the granitoids from El Infiernillo and La Ovejería and the regional metasedimentary rocks. These could be explained by mingling or mixing of magmas with different geochemical signatures, or by an assimilation process that involves a large contribution of metasedimentary material to the calc-alkaline intrusive magmas.Institut de Ciències de la Terra "Jaume Almera"20182018-01-0120182018-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10272/14848reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Españolspaopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/148482026-06-02T14:58:11Z
dc.title.none.fl_str_mv Hybridization between I-type and S-type granites in the Ordovician Famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina
title Hybridization between I-type and S-type granites in the Ordovician Famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina
spellingShingle Hybridization between I-type and S-type granites in the Ordovician Famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina
López, J. P.
Hybridization
Lower Paleozoic
Sierras Pampeanas
Tafí del Valle
La Ovejería pluton
title_short Hybridization between I-type and S-type granites in the Ordovician Famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina
title_full Hybridization between I-type and S-type granites in the Ordovician Famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina
title_fullStr Hybridization between I-type and S-type granites in the Ordovician Famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina
title_full_unstemmed Hybridization between I-type and S-type granites in the Ordovician Famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina
title_sort Hybridization between I-type and S-type granites in the Ordovician Famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina
dc.creator.none.fl_str_mv López, J. P.
Bellos, L. I.
Díaz Alvarado, Juan
Castro Dorado, Antonio
author López, J. P.
author_facet López, J. P.
Bellos, L. I.
Díaz Alvarado, Juan
Castro Dorado, Antonio
author_role author
author2 Bellos, L. I.
Díaz Alvarado, Juan
Castro Dorado, Antonio
author2_role author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Hybridization
Lower Paleozoic
Sierras Pampeanas
Tafí del Valle
La Ovejería pluton
topic Hybridization
Lower Paleozoic
Sierras Pampeanas
Tafí del Valle
La Ovejería pluton
description In the Tafí del Valle region, in northwestern Argentina, several intrusive bodies of lower Paleozoic age are emplaced in a low to medium metamorphic grade basement, owing to the Sierras Pampeanas. The plutonic complexes called El Infiernillo, La Ovejería, Loma Pelada and Los Cuartos have been previously included in regional descriptive compilations. In this study, new trace element analyses of these intrusive granitoids are presented and added to the geochemical background in order to constrain the main petrological and geochemical characteristics of the lower Paleozoic magmatism in the Tafí del Valle region.Most of the studied intrusive granitoids show calc-alkaline geochemical signatures and are moderately to strongly peraluminous. They can be grouped into three main groups: 1) La Ovejería and El Infiernillo samples present cotectic evolutions that match those trends traced for Cpx + Pl fractionation and similar to the regional calc-alkaline systems used for comparison, at least in the less evolved tonalites and granodiorites. 2) A second group is composed of some granitoids from Loma Pelada and Los Cuartos plutons, which present very evolved compositions with low percentage of CaO and MgO. These granitoids are placed in the compositional range of S type magmas described in the region, trending to the location of the host rocks with increasing peraluminosity. 3) The third group is comprised by the samples of Loma Pelada and Los Cuartos intrusive units that show intermediate geochemical characteristics between the granitoids from El Infiernillo and La Ovejería and the regional metasedimentary rocks. These could be explained by mingling or mixing of magmas with different geochemical signatures, or by an assimilation process that involves a large contribution of metasedimentary material to the calc-alkaline intrusive magmas.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-01-01
2018
2018-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10272/14848
url http://hdl.handle.net/10272/14848
dc.language.none.fl_str_mv Español
spa
language_invalid_str_mv Español
language spa
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Institut de Ciències de la Terra "Jaume Almera"
publisher.none.fl_str_mv Institut de Ciències de la Terra "Jaume Almera"
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
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