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dc.contributor.authorGonzález, Pablo D.-
dc.contributor.authorSato, Ana M.-
dc.contributor.authorLlambias, Eduardo J.-
dc.contributor.authorPetronilho, Liliane A.-
dc.date.accessioned2019-08-21T14:04:55Z-
dc.date.available2019-08-21T14:04:55Z-
dc.date.issued2009-08-
dc.identifier.citationGonzalez, 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; 89-112es_ES
dc.identifier.issn0895-9811es_ES
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S089598110900039X-
dc.identifier.urihttp://hdl.handle.net/11336/74325-
dc.identifier.urihttps://rid.unrn.edu.ar/jspui/handle/20.500.12049/2923-
dc.format.extentp. 89-112es_ES
dc.format.mediumimpresoes_ES
dc.format.mediumdigitales_ES
dc.language.isoenges_ES
dc.titlePetrology 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.es_ES
dc.typeArticuloes_ES
dc.rights.licensehttps://creativecommons.org/licenses/by-nc-sa/4.0/es_ES
dc.description.filiationFil: Gonzalez, Pablo D. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentinaes_ES
dc.description.filiationFil: Gonzalez, Pablo D. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentinaes_ES
dc.description.filiationFil: Sato, Ana M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentinaes_ES
dc.description.filiationFil: Sato, Ana M. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentinaes_ES
dc.description.filiationFil: Llambias, Eduardo J. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentinaes_ES
dc.description.filiationFil: Llambias, Eduardo J. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentinaes_ES
dc.description.filiationFil: Petronilho, Liliane A.. Instituto de Geociências, Universidade de São Paulo, Rua do Lago 562, CEP-05508-900, São Paulo; Brasiles_ES
dc.subject.keywordAlgoma Typees_ES
dc.subject.keywordBanded Iron Formationes_ES
dc.subject.keywordSierras de San Luises_ES
dc.type.versioninfo:eu-repo/semantics/acceptedVersiones_ES
dc.subject.materiaIngeniería, Ciencia y Tecnologíaes_ES
dc.origin.lugarDesarrolloPergamon-Elsevier Science Ltdes_ES
dc.relation.journalissue28es_ES
dc.description.reviewtruees_ES
dc.description.resumenThe 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.es_ES
dc.identifier.doihttp://dx.doi.org/10.1016/j.jsames.2009.03.005-
dc.relation.journalTitleJournal of South American Earth Scienceses_ES
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