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dc.contributor.author
Boffadossi, María Alejandra
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dc.contributor.author
Díaz Alvarado, Juan
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dc.contributor.author
Pinotti, Lucio Pedro
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dc.contributor.author
Jung, Stefan
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dc.contributor.author
D'eramo, Fernando Javier
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dc.contributor.author
Pedrera, Antonio
dc.contributor.author
Millán Martinez, María
dc.contributor.author
Demartis, Manuel
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dc.contributor.author
Azor, Antonio
dc.contributor.author
Muratori, María Eugenia
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dc.date.available
2023-12-01T14:40:43Z
dc.date.issued
2023-09
dc.identifier.citation
Boffadossi, María Alejandra; Díaz Alvarado, Juan; Pinotti, Lucio Pedro; Jung, Stefan; D'eramo, Fernando Javier; et al.; A bimodal source for the generation of tonalitic to granitic magmas in a non-subduction-related magmatic belt: An example from the Sierra Chica of Córdoba, Argentina; Elsevier Science; Lithos; 452-453; 9-2023; 1-24
dc.identifier.issn
0024-4937
dc.identifier.uri
http://hdl.handle.net/11336/218991
dc.description.abstract
A notable consensus prevails about the hybrid nature of intermediate calc-alkaline magmatism. Accordingly, petrogenetic models envisage the addition of young mantle material and cortical recycling in those geological settings where intermediate magmas are dominant. Most exhaustively studied examples are: 1) magmatic arcs associated with subduction zone settings where oceanic crust and sediments are introduced into the mantle wedge, and 2) deep crustal sections are pervaded by hot, H2O-rich mantle-derived liquids. Nevertheless, back-arc or foreland terranes of several hundred kilometers in width, frequently characterized by high heat flux, crustal melting, recycling and melt fractionation, are crucial areas to evaluate the generation of intermediate magmatism. The Sierra Chica of Córdoba (Argentina) provides an excellent example to study these processes. The high-grade crustal segment shows metamorphosed pelitic and basaltic protoliths that were part of an old sedimentary succession. We evaluate the evolution of this bimodal source during two consecutive early Paleozoic orogenic periods when it was established as the source area of intermediate to silicic magmatism far from the contemporary magmatic arcs. Field relations and new geochemical and geochronological data revealed the occurrence of two magmatic events during Cambrian and early Ordovician periods. Cambrian migmatization and partial melting (∼528 to 505 Ma) is represented by irregular-shaped monzogranites and tonalites, while early Ordovician magmatism (∼480 Ma) is characterized by dyke-shaped pegmatites and tonalite-trondhjemites. The preservation of two contrasting igneous lineages suggests a genetic linkage between metapelitic and amphibolitic migmatites and between granitic and tonalitic-trondhjemitic partial melts. Coeval with this magmatism, Famatinian tonalitic-trondhjemitic to monzogranitic magmas intruded upper crustal levels in Sierra Chica and other parts of Sierras of Córdoba. Geochemical signatures point to a bimodal (mafic/felsic) source for this intermediate to silica-rich magmatism. The evolution of partial melts studied in the Sierra Chica is depicted on the basis of geochemical projections with fractionation and hybridization models, in order to establish the primary liquids of this Famatinian magmatic belt. Trends defined by Famatinian tonalites, trondhjemites and granodiorites suggest that primary Ca-rich melts (tonalites and trondhjemites of this study) evolved through fractionation of plagioclase (30–50 vol%) compatible with the preservation of inferred co-magmatic Pl-cumulates within these plutonic bodies. Peraluminous granites and monzogranites can be explained by a simple restite unmixing process involving alkali-rich liquids generated in the metapelitic part of the source. The addition (hybridization) of up to 30 vol% of granitic melts to the tonalite-trondhjemite end-member may account for the composition of other Famatinian granodioritic to monzogranitic intrusive rocks from the plutonic belt. The crustal segments of the Sierra Chica have undergone metamorphism and partial melting in out-of-arc settings: the Cambrian fore-arc and the early Ordovician back-arc. The voluminous magmatic belt rooted in the paired metapelitic-amphibolic source area is involved in the origin of intermediate to silicic Famatinian magmatism without significant mass transfer from the mantle and crustal growth, instead it is dominated by crustal melting, recycling and fractionation.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
BIMODAL SOURCE
dc.subject
MONZOGRANITES
dc.subject
OUT-OF-ARC DOMAINS
dc.subject
PEGMATITES
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PELITIC-AMPHIBOLITIC MIGMATITES
dc.subject
TONALITE-TRONDHJEMITES
dc.subject.classification
Geología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
A bimodal source for the generation of tonalitic to granitic magmas in a non-subduction-related magmatic belt: An example from the Sierra Chica of Córdoba, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-11-28T14:56:47Z
dc.journal.volume
452-453
dc.journal.pagination
1-24
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
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
dc.description.fil
Fil: Díaz Alvarado, Juan. Universidad Rey Juan Carlos. Departamento de Biología y Geología; España
dc.description.fil
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
dc.description.fil
Fil: Jung, Stefan. Universitat Hamburg. Fakutat Fur Mathematik, Informak Und Naturwissenschaften. Fachbereich Geowissenchatten. Mineralogisch - Petrographisches Institut.; . Universit¨at Hamburg. Mineralogisch - Petrographisches Institut; Alemania
dc.description.fil
Fil: D'eramo, Fernando Javier. 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
dc.description.fil
Fil: Pedrera, Antonio. Instituto Geológico y Minero de España; España
dc.description.fil
Fil: Millán Martinez, María. Instituto Geológico y Minero de España; España
dc.description.fil
Fil: Demartis, Manuel. 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
dc.description.fil
Fil: Azor, Antonio. Universidad de Granada; España
dc.description.fil
Fil: Muratori, María Eugenia. 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
dc.journal.title
Lithos
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0024493723001913?via%3Dihub
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.lithos.2023.107207
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