The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina

Autores
Bellos, Laura Iudith; Boffadossi, María Alejandra; Demartis, Manuel; Acosta Nagle, Ana Eugenia; D'eramo, Fernando Javier; Pinotti, Lucio Pedro; Lopez, Jose Pablo; Muratori, María Eugenia; Coniglio, Jorge Enrique; Díaz Alvarado, Juan
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Twoconsecutive orogenies, named Pampean and Famatinian, delineated most of themetamorphic and igneous rocks that are currently exposed in the SierrasPampeanas. During the Cambrian and early Ordovician periods development of aclassic magmatic arc and another magmatic/migmatitic belt took place, thelatter nowadays located in the easternmost sector of the Eastern Sierras Pampeanas.TheSierra Norte-Ambargasta batholith is considered the Pampean magmatic arc and showsa calc-alkaline trend, similar to those defined by magmas associated withandesitic sources. The continuation to the north of this Cambrian magmatism isrepresented by smaller plutons located in the Cumbres Calchaquíes, Guasayán andCordillera Oriental ranges, emplaced in areas of medium-upper crust, mostly inschists, phyllites and slates of low- and medium metamorphic grade. Theassimilation of metasedimentary material from the host rocks by magmas similarto those described in the Sierra Norte-Ambargasta would have been the processthat gave rise to the geochemical characteristics of these granitoids. On thecontrary, the southernmost Sierras de Córdoba exposes a deep crustal sectiondominated by migmatites and high-grade metamorphic rocks with a diverse varietyof protoliths such as pelites-30 greywackes and amphibolites, and minormarbles, calc-silicate and ultramafic rocks. In this context, the diversity ofmagmatic rocks is due to the variety of protoliths involved in the region oforigin, which gave rise to granitic and trondhjemitic melts related toleucocratic bodies formed during partial melting. On the other hand, the early Ordovicianback-arc magmatism exposed in the Eastern Sierras Pampeanas is more homogeneousin the northern part compared to the southern one. It is represented by Pl-richtonalites and granodiorites with high Na2O, CaO, Al2O3 and Sr contents, whichdefine calcic to calc-alkaline, slight to highly peraluminous and magnesian toferroan series. The petrogenesis of these rocks would be related to acombination of plagioclase fractionation from tonalitic-trondhjemitic primary meltsand hybridization processes between two end-members (monzogranitic andtonalitic trondhjemitic melts), which gave rise to an intermediate magmatism ofhybrid composition. The sourcearea for this Famatinian magmatism could have its origin within the same domainwhere the Cambrian hot orogen developed along the Pampean convergent margin.Small amounts of Grt-bearing leucogranites and pegmatitic dykes could have beengenerated in response to the emplacement of intermediate magmas in middle-crustlevels producing the partial melting of metasediments from Puncoviscana Fm. TheFamatinian back-arc was associated with a generalized extension, marinesediment deposition and anatexis in the lower crust, causing differentiationand crustal recycling in the high-grade Pampean metamorphic basement.
Fil: Bellos, Laura Iudith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Fil: Boffadossi, María Alejandra. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina
Fil: Demartis, Manuel. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina
Fil: Acosta Nagle, Ana Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Fil: D'eramo, Fernando Javier. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina
Fil: Pinotti, Lucio Pedro. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina
Fil: Lopez, Jose Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Fil: Muratori, María Eugenia. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina
Fil: Coniglio, Jorge Enrique. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina
Fil: Díaz Alvarado, Juan. Universidad del Rey Juan Carlos. Departamento de Biologia y Geologia, Fisica y Quimica Organica.; España
Materia
Pampean orogeny
Famatinian orogeny
magmatic belts
migmatites
TTG
hybrid magmatism
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
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oai:ri.conicet.gov.ar:11336/261009
Acceder
id CONICETDig_ec60471acecb47a9893ebab0c38a0334
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, ArgentinaBellos, Laura IudithBoffadossi, María AlejandraDemartis, ManuelAcosta Nagle, Ana EugeniaD'eramo, Fernando JavierPinotti, Lucio PedroLopez, Jose PabloMuratori, María EugeniaConiglio, Jorge EnriqueDíaz Alvarado, JuanPampean orogenyFamatinian orogenymagmatic beltsmigmatitesTTGhybrid magmatismhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Twoconsecutive orogenies, named Pampean and Famatinian, delineated most of themetamorphic and igneous rocks that are currently exposed in the SierrasPampeanas. During the Cambrian and early Ordovician periods development of aclassic magmatic arc and another magmatic/migmatitic belt took place, thelatter nowadays located in the easternmost sector of the Eastern Sierras Pampeanas.TheSierra Norte-Ambargasta batholith is considered the Pampean magmatic arc and showsa calc-alkaline trend, similar to those defined by magmas associated withandesitic sources. The continuation to the north of this Cambrian magmatism isrepresented by smaller plutons located in the Cumbres Calchaquíes, Guasayán andCordillera Oriental ranges, emplaced in areas of medium-upper crust, mostly inschists, phyllites and slates of low- and medium metamorphic grade. Theassimilation of metasedimentary material from the host rocks by magmas similarto those described in the Sierra Norte-Ambargasta would have been the processthat gave rise to the geochemical characteristics of these granitoids. On thecontrary, the southernmost Sierras de Córdoba exposes a deep crustal sectiondominated by migmatites and high-grade metamorphic rocks with a diverse varietyof protoliths such as pelites-30 greywackes and amphibolites, and minormarbles, calc-silicate and ultramafic rocks. In this context, the diversity ofmagmatic rocks is due to the variety of protoliths involved in the region oforigin, which gave rise to granitic and trondhjemitic melts related toleucocratic bodies formed during partial melting. On the other hand, the early Ordovicianback-arc magmatism exposed in the Eastern Sierras Pampeanas is more homogeneousin the northern part compared to the southern one. It is represented by Pl-richtonalites and granodiorites with high Na2O, CaO, Al2O3 and Sr contents, whichdefine calcic to calc-alkaline, slight to highly peraluminous and magnesian toferroan series. The petrogenesis of these rocks would be related to acombination of plagioclase fractionation from tonalitic-trondhjemitic primary meltsand hybridization processes between two end-members (monzogranitic andtonalitic trondhjemitic melts), which gave rise to an intermediate magmatism ofhybrid composition. The sourcearea for this Famatinian magmatism could have its origin within the same domainwhere the Cambrian hot orogen developed along the Pampean convergent margin.Small amounts of Grt-bearing leucogranites and pegmatitic dykes could have beengenerated in response to the emplacement of intermediate magmas in middle-crustlevels producing the partial melting of metasediments from Puncoviscana Fm. TheFamatinian back-arc was associated with a generalized extension, marinesediment deposition and anatexis in the lower crust, causing differentiationand crustal recycling in the high-grade Pampean metamorphic basement.Fil: Bellos, Laura Iudith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; ArgentinaFil: Boffadossi, María Alejandra. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; ArgentinaFil: Demartis, Manuel. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; ArgentinaFil: Acosta Nagle, Ana Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; ArgentinaFil: D'eramo, Fernando Javier. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; ArgentinaFil: Pinotti, Lucio Pedro. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; ArgentinaFil: Lopez, Jose Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; ArgentinaFil: Muratori, María Eugenia. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; ArgentinaFil: Coniglio, Jorge Enrique. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; ArgentinaFil: Díaz Alvarado, Juan. Universidad del Rey Juan Carlos. Departamento de Biologia y Geologia, Fisica y Quimica Organica.; EspañaPergamon-Elsevier Science Ltd2024-07info: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/11336/261009Bellos, Laura Iudith; Boffadossi, María Alejandra; Demartis, Manuel; Acosta Nagle, Ana Eugenia; D'eramo, Fernando Javier; et al.; The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 144; 7-2024; 1-480895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0895981124002542info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2024.105032info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:08:48Zoai:ri.conicet.gov.ar:11336/261009instacron: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 10:08:48.413CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina
title The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina
spellingShingle The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina
Bellos, Laura Iudith
Pampean orogeny
Famatinian orogeny
magmatic belts
migmatites
TTG
hybrid magmatism
title_short The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina
title_full The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina
title_fullStr The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina
title_full_unstemmed The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina
title_sort The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina
dc.creator.none.fl_str_mv Bellos, Laura Iudith
Boffadossi, María Alejandra
Demartis, Manuel
Acosta Nagle, Ana Eugenia
D'eramo, Fernando Javier
Pinotti, Lucio Pedro
Lopez, Jose Pablo
Muratori, María Eugenia
Coniglio, Jorge Enrique
Díaz Alvarado, Juan
author Bellos, Laura Iudith
author_facet Bellos, Laura Iudith
Boffadossi, María Alejandra
Demartis, Manuel
Acosta Nagle, Ana Eugenia
D'eramo, Fernando Javier
Pinotti, Lucio Pedro
Lopez, Jose Pablo
Muratori, María Eugenia
Coniglio, Jorge Enrique
Díaz Alvarado, Juan
author_role author
author2 Boffadossi, María Alejandra
Demartis, Manuel
Acosta Nagle, Ana Eugenia
D'eramo, Fernando Javier
Pinotti, Lucio Pedro
Lopez, Jose Pablo
Muratori, María Eugenia
Coniglio, Jorge Enrique
Díaz Alvarado, Juan
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Pampean orogeny
Famatinian orogeny
magmatic belts
migmatites
TTG
hybrid magmatism
topic Pampean orogeny
Famatinian orogeny
magmatic belts
migmatites
TTG
hybrid magmatism
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Twoconsecutive orogenies, named Pampean and Famatinian, delineated most of themetamorphic and igneous rocks that are currently exposed in the SierrasPampeanas. During the Cambrian and early Ordovician periods development of aclassic magmatic arc and another magmatic/migmatitic belt took place, thelatter nowadays located in the easternmost sector of the Eastern Sierras Pampeanas.TheSierra Norte-Ambargasta batholith is considered the Pampean magmatic arc and showsa calc-alkaline trend, similar to those defined by magmas associated withandesitic sources. The continuation to the north of this Cambrian magmatism isrepresented by smaller plutons located in the Cumbres Calchaquíes, Guasayán andCordillera Oriental ranges, emplaced in areas of medium-upper crust, mostly inschists, phyllites and slates of low- and medium metamorphic grade. Theassimilation of metasedimentary material from the host rocks by magmas similarto those described in the Sierra Norte-Ambargasta would have been the processthat gave rise to the geochemical characteristics of these granitoids. On thecontrary, the southernmost Sierras de Córdoba exposes a deep crustal sectiondominated by migmatites and high-grade metamorphic rocks with a diverse varietyof protoliths such as pelites-30 greywackes and amphibolites, and minormarbles, calc-silicate and ultramafic rocks. In this context, the diversity ofmagmatic rocks is due to the variety of protoliths involved in the region oforigin, which gave rise to granitic and trondhjemitic melts related toleucocratic bodies formed during partial melting. On the other hand, the early Ordovicianback-arc magmatism exposed in the Eastern Sierras Pampeanas is more homogeneousin the northern part compared to the southern one. It is represented by Pl-richtonalites and granodiorites with high Na2O, CaO, Al2O3 and Sr contents, whichdefine calcic to calc-alkaline, slight to highly peraluminous and magnesian toferroan series. The petrogenesis of these rocks would be related to acombination of plagioclase fractionation from tonalitic-trondhjemitic primary meltsand hybridization processes between two end-members (monzogranitic andtonalitic trondhjemitic melts), which gave rise to an intermediate magmatism ofhybrid composition. The sourcearea for this Famatinian magmatism could have its origin within the same domainwhere the Cambrian hot orogen developed along the Pampean convergent margin.Small amounts of Grt-bearing leucogranites and pegmatitic dykes could have beengenerated in response to the emplacement of intermediate magmas in middle-crustlevels producing the partial melting of metasediments from Puncoviscana Fm. TheFamatinian back-arc was associated with a generalized extension, marinesediment deposition and anatexis in the lower crust, causing differentiationand crustal recycling in the high-grade Pampean metamorphic basement.
Fil: Bellos, Laura Iudith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Fil: Boffadossi, María Alejandra. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina
Fil: Demartis, Manuel. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina
Fil: Acosta Nagle, Ana Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Fil: D'eramo, Fernando Javier. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina
Fil: Pinotti, Lucio Pedro. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina
Fil: Lopez, Jose Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
Fil: Muratori, María Eugenia. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina
Fil: Coniglio, Jorge Enrique. Universidad Nacional de Rio Cuarto. Facultad de Cs.exactas Fisicoquimicas y Naturales. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Cordoba. Instituto de Ciencias de la Tierra, Biodiversidad y Ambiente.; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Geología; Argentina
Fil: Díaz Alvarado, Juan. Universidad del Rey Juan Carlos. Departamento de Biologia y Geologia, Fisica y Quimica Organica.; España
description Twoconsecutive orogenies, named Pampean and Famatinian, delineated most of themetamorphic and igneous rocks that are currently exposed in the SierrasPampeanas. During the Cambrian and early Ordovician periods development of aclassic magmatic arc and another magmatic/migmatitic belt took place, thelatter nowadays located in the easternmost sector of the Eastern Sierras Pampeanas.TheSierra Norte-Ambargasta batholith is considered the Pampean magmatic arc and showsa calc-alkaline trend, similar to those defined by magmas associated withandesitic sources. The continuation to the north of this Cambrian magmatism isrepresented by smaller plutons located in the Cumbres Calchaquíes, Guasayán andCordillera Oriental ranges, emplaced in areas of medium-upper crust, mostly inschists, phyllites and slates of low- and medium metamorphic grade. Theassimilation of metasedimentary material from the host rocks by magmas similarto those described in the Sierra Norte-Ambargasta would have been the processthat gave rise to the geochemical characteristics of these granitoids. On thecontrary, the southernmost Sierras de Córdoba exposes a deep crustal sectiondominated by migmatites and high-grade metamorphic rocks with a diverse varietyof protoliths such as pelites-30 greywackes and amphibolites, and minormarbles, calc-silicate and ultramafic rocks. In this context, the diversity ofmagmatic rocks is due to the variety of protoliths involved in the region oforigin, which gave rise to granitic and trondhjemitic melts related toleucocratic bodies formed during partial melting. On the other hand, the early Ordovicianback-arc magmatism exposed in the Eastern Sierras Pampeanas is more homogeneousin the northern part compared to the southern one. It is represented by Pl-richtonalites and granodiorites with high Na2O, CaO, Al2O3 and Sr contents, whichdefine calcic to calc-alkaline, slight to highly peraluminous and magnesian toferroan series. The petrogenesis of these rocks would be related to acombination of plagioclase fractionation from tonalitic-trondhjemitic primary meltsand hybridization processes between two end-members (monzogranitic andtonalitic trondhjemitic melts), which gave rise to an intermediate magmatism ofhybrid composition. The sourcearea for this Famatinian magmatism could have its origin within the same domainwhere the Cambrian hot orogen developed along the Pampean convergent margin.Small amounts of Grt-bearing leucogranites and pegmatitic dykes could have beengenerated in response to the emplacement of intermediate magmas in middle-crustlevels producing the partial melting of metasediments from Puncoviscana Fm. TheFamatinian back-arc was associated with a generalized extension, marinesediment deposition and anatexis in the lower crust, causing differentiationand crustal recycling in the high-grade Pampean metamorphic basement.
publishDate 2024
dc.date.none.fl_str_mv 2024-07
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/11336/261009
Bellos, Laura Iudith; Boffadossi, María Alejandra; Demartis, Manuel; Acosta Nagle, Ana Eugenia; D'eramo, Fernando Javier; et al.; The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 144; 7-2024; 1-48
0895-9811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/261009
identifier_str_mv Bellos, Laura Iudith; Boffadossi, María Alejandra; Demartis, Manuel; Acosta Nagle, Ana Eugenia; D'eramo, Fernando Javier; et al.; The Cambrian (Pampean) and early Ordovician (Famatinian) magmatic/migmatitic belt in the Eastern Sierras Pampeanas, Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 144; 7-2024; 1-48
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://linkinghub.elsevier.com/retrieve/pii/S0895981124002542
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2024.105032
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
_version_ 1842270057938288640
score 13.13397

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