Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex.

Autores: González, Pablo D.; Sato, Ana M.; Llambias, Eduardo J.; Petronilho, Liliane A.
Año de publicación: 2009
Idioma: español castellano
Tipo de recurso: artículo
Estado: versión aceptada
Descripción: Fil: Gonzalez, Pablo D. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Gonzalez, Pablo D. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Sato, Ana M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Sato, Ana M. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Llambias, Eduardo J. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Llambias, Eduardo J. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Petronilho, Liliane A.. Instituto de Geociências, Universidade de São Paulo, Rua do Lago 562, CEP-05508-900, São Paulo; Brasil
The metamorphosed banded iron formation from the Nogolí Metamorphic Complex of western Sierra de San Luis, Eastern Sierras Pampeanas of Argentina (Nogolí area, 32°55'S-66°15'W) is classified as an oxide facies iron formation of Algoma Type, with a tectonic setting possibly associated with an island arc or back arc, on the basis of field mapping, mineral and textural arrangements and whole rock geochemical features. The origin of banded iron formation is mainly related to chemical precipitation of hydrogenous sediments from seawater in oceanic environments. The primary chemical precipitate is a result of solutions that represent mixtures of seawater and hydrothermal fluids, with significant dilution by mafic-ultramafic volcanic and siliciclastic materials. Multi-stage TDM model ages of 1670, 1854 and 1939 Ma and positive, mantle-like ξ Nd(1502) values of +3.8, +1.5 and +0.5 from the banded iron formation are around the range of those mafic to ultramafic meta-volcanic rocks of Nogolí Metamorphic Complex, which are between 1679 and 1765 Ma and +2.64 and +3.68, respectively. This Sm and Nd isotopic connection suggests a close genetic relationship between ferruginous and mafic-ultramafic meta-volcanic rocks, as part of the same island arc or back arc setting. A previous Sm-Nd whole rock isochron of ∼1.5 Ga performed on mafic-ultramafic meta-volcanic rocks led to the interpretation that chemical sedimentation as old as Mesoproterozoic is possible for the banded iron formation. A clockwise P-T path can be inferred for the regional metamorphic evolution of the banded iron formation, with three distinctive trajectories: (1) Relict prograde M1-M3 segment with gradual P and T increase from greenschist facies at M1 to amphibolite facies at M3. (2) Peak P-T conditions at high amphibolite-low granulite facies during M4. (3) Retrograde counterpart of M4, that returns from amphibolite facies and stabilizes at greenschist facies during M5. Each trajectory may be regarded as produced by different tectonic events related to the Pampean? (1) and the Famatinian (2 and 3) orogenies, during the Early to Middle Paleozoic. The Nogolí Metamorphic Complex is interpreted as part of a greenstone belt within the large Meso- to Neoproterozoic Pampean Terrane of the Eastern Sierras Pampeanas of Argentina. © 2009 Elsevier Ltd. All rights reserved.
Materia: Ingeniería, Ciencia y Tecnología
Algoma Type
Banded Iron Formation
Sierras de San Luis
Ingeniería, Ciencia y Tecnología
Nivel de accesibilidad: acceso abierto
Condiciones de uso: https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
Institución: Universidad Nacional de Río Negro
OAI Identificador: oai:rid.unrn.edu.ar:20.500.12049/2923

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repository_id_str	4369
network_name_str	RID-UNRN (UNRN)
spelling	Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex.González, Pablo D.Sato, Ana M.Llambias, Eduardo J.Petronilho, Liliane A.Ingeniería, Ciencia y TecnologíaAlgoma TypeBanded Iron FormationSierras de San LuisIngeniería, Ciencia y TecnologíaFil: Gonzalez, Pablo D. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Gonzalez, Pablo D. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Sato, Ana M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Sato, Ana M. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Llambias, Eduardo J. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Llambias, Eduardo J. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Petronilho, Liliane A.. Instituto de Geociências, Universidade de São Paulo, Rua do Lago 562, CEP-05508-900, São Paulo; BrasilThe metamorphosed banded iron formation from the Nogolí Metamorphic Complex of western Sierra de San Luis, Eastern Sierras Pampeanas of Argentina (Nogolí area, 32°55'S-66°15'W) is classified as an oxide facies iron formation of Algoma Type, with a tectonic setting possibly associated with an island arc or back arc, on the basis of field mapping, mineral and textural arrangements and whole rock geochemical features. The origin of banded iron formation is mainly related to chemical precipitation of hydrogenous sediments from seawater in oceanic environments. The primary chemical precipitate is a result of solutions that represent mixtures of seawater and hydrothermal fluids, with significant dilution by mafic-ultramafic volcanic and siliciclastic materials. Multi-stage TDM model ages of 1670, 1854 and 1939 Ma and positive, mantle-like ξ Nd(1502) values of +3.8, +1.5 and +0.5 from the banded iron formation are around the range of those mafic to ultramafic meta-volcanic rocks of Nogolí Metamorphic Complex, which are between 1679 and 1765 Ma and +2.64 and +3.68, respectively. This Sm and Nd isotopic connection suggests a close genetic relationship between ferruginous and mafic-ultramafic meta-volcanic rocks, as part of the same island arc or back arc setting. A previous Sm-Nd whole rock isochron of ∼1.5 Ga performed on mafic-ultramafic meta-volcanic rocks led to the interpretation that chemical sedimentation as old as Mesoproterozoic is possible for the banded iron formation. A clockwise P-T path can be inferred for the regional metamorphic evolution of the banded iron formation, with three distinctive trajectories: (1) Relict prograde M1-M3 segment with gradual P and T increase from greenschist facies at M1 to amphibolite facies at M3. (2) Peak P-T conditions at high amphibolite-low granulite facies during M4. (3) Retrograde counterpart of M4, that returns from amphibolite facies and stabilizes at greenschist facies during M5. Each trajectory may be regarded as produced by different tectonic events related to the Pampean? (1) and the Famatinian (2 and 3) orogenies, during the Early to Middle Paleozoic. The Nogolí Metamorphic Complex is interpreted as part of a greenstone belt within the large Meso- to Neoproterozoic Pampean Terrane of the Eastern Sierras Pampeanas of Argentina. © 2009 Elsevier Ltd. All rights reserved.2009-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfGonzalez, Pablo D., Sato, Ana M., Llambias, Eduardo J. & Petronilho, Liliane A. (2009). Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex. Pergamon-Elsevier Science Ltd. Journal of South American Earth Sciences; 28; 2; 89-1120895-9811https://www.sciencedirect.com/science/article/pii/S089598110900039Xhttp://hdl.handle.net/11336/74325https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2923http://dx.doi.org/10.1016/j.jsames.2009.03.005spa28Journal of South American Earth Sciencesinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2026-09-24T12:43:30Zoai:rid.unrn.edu.ar:20.500.12049/2923instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692026-09-24 12:43:32.996RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse
dc.title.none.fl_str_mv	Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex.
title	Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex.
spellingShingle	Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex. González, Pablo D. Ingeniería, Ciencia y Tecnología Algoma Type Banded Iron Formation Sierras de San Luis Ingeniería, Ciencia y Tecnología
title_short	Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex.
title_full	Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex.
title_fullStr	Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex.
title_full_unstemmed	Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex.
title_sort	Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex.
dc.creator.none.fl_str_mv	González, Pablo D. Sato, Ana M. Llambias, Eduardo J. Petronilho, Liliane A.
author	González, Pablo D.
author_facet	González, Pablo D. Sato, Ana M. Llambias, Eduardo J. Petronilho, Liliane A.
author_role	author
author2	Sato, Ana M. Llambias, Eduardo J. Petronilho, Liliane A.
author2_role	author author author
dc.subject.none.fl_str_mv	Ingeniería, Ciencia y Tecnología Algoma Type Banded Iron Formation Sierras de San Luis Ingeniería, Ciencia y Tecnología
topic	Ingeniería, Ciencia y Tecnología Algoma Type Banded Iron Formation Sierras de San Luis Ingeniería, Ciencia y Tecnología
dc.description.none.fl_txt_mv	Fil: Gonzalez, Pablo D. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Gonzalez, Pablo D. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina Fil: Sato, Ana M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Sato, Ana M. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina Fil: Llambias, Eduardo J. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Llambias, Eduardo J. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina Fil: Petronilho, Liliane A.. Instituto de Geociências, Universidade de São Paulo, Rua do Lago 562, CEP-05508-900, São Paulo; Brasil The metamorphosed banded iron formation from the Nogolí Metamorphic Complex of western Sierra de San Luis, Eastern Sierras Pampeanas of Argentina (Nogolí area, 32°55'S-66°15'W) is classified as an oxide facies iron formation of Algoma Type, with a tectonic setting possibly associated with an island arc or back arc, on the basis of field mapping, mineral and textural arrangements and whole rock geochemical features. The origin of banded iron formation is mainly related to chemical precipitation of hydrogenous sediments from seawater in oceanic environments. The primary chemical precipitate is a result of solutions that represent mixtures of seawater and hydrothermal fluids, with significant dilution by mafic-ultramafic volcanic and siliciclastic materials. Multi-stage TDM model ages of 1670, 1854 and 1939 Ma and positive, mantle-like ξ Nd(1502) values of +3.8, +1.5 and +0.5 from the banded iron formation are around the range of those mafic to ultramafic meta-volcanic rocks of Nogolí Metamorphic Complex, which are between 1679 and 1765 Ma and +2.64 and +3.68, respectively. This Sm and Nd isotopic connection suggests a close genetic relationship between ferruginous and mafic-ultramafic meta-volcanic rocks, as part of the same island arc or back arc setting. A previous Sm-Nd whole rock isochron of ∼1.5 Ga performed on mafic-ultramafic meta-volcanic rocks led to the interpretation that chemical sedimentation as old as Mesoproterozoic is possible for the banded iron formation. A clockwise P-T path can be inferred for the regional metamorphic evolution of the banded iron formation, with three distinctive trajectories: (1) Relict prograde M1-M3 segment with gradual P and T increase from greenschist facies at M1 to amphibolite facies at M3. (2) Peak P-T conditions at high amphibolite-low granulite facies during M4. (3) Retrograde counterpart of M4, that returns from amphibolite facies and stabilizes at greenschist facies during M5. Each trajectory may be regarded as produced by different tectonic events related to the Pampean? (1) and the Famatinian (2 and 3) orogenies, during the Early to Middle Paleozoic. The Nogolí Metamorphic Complex is interpreted as part of a greenstone belt within the large Meso- to Neoproterozoic Pampean Terrane of the Eastern Sierras Pampeanas of Argentina. © 2009 Elsevier Ltd. All rights reserved.
description	Fil: Gonzalez, Pablo D. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
publishDate	2009
dc.date.none.fl_str_mv	2009-08
dc.type.none.fl_str_mv	info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo
format	article
status_str	acceptedVersion
dc.identifier.none.fl_str_mv	Gonzalez, Pablo D., Sato, Ana M., Llambias, Eduardo J. & Petronilho, Liliane A. (2009). Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex. Pergamon-Elsevier Science Ltd. Journal of South American Earth Sciences; 28; 2; 89-112 0895-9811 https://www.sciencedirect.com/science/article/pii/S089598110900039X http://hdl.handle.net/11336/74325 https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2923 http://dx.doi.org/10.1016/j.jsames.2009.03.005
identifier_str_mv	Gonzalez, Pablo D., Sato, Ana M., Llambias, Eduardo J. & Petronilho, Liliane A. (2009). Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex. Pergamon-Elsevier Science Ltd. Journal of South American Earth Sciences; 28; 2; 89-112 0895-9811
url	https://www.sciencedirect.com/science/article/pii/S089598110900039X http://hdl.handle.net/11336/74325 https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2923 http://dx.doi.org/10.1016/j.jsames.2009.03.005
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dc.relation.none.fl_str_mv	28 Journal of South American Earth Sciences
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Petrology and geochemistry of the banded iron formation in the Eastern Sierras Pampeanas of San Luis (Argentina): Implications for the evolution of the Nogolí Metamorphic Complex.

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