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dc.contributor.author
Falco, Juan Ignacio  
dc.contributor.author
Hauser, Natalia  
dc.contributor.author
Scivetti, Nicolás  
dc.contributor.author
Reimold, Wolf Uwe  
dc.contributor.author
Schmitt, Ralf Thomas  
dc.contributor.author
Folguera Telichevsky, Andres  
dc.date.available
2022-01-17T14:25:53Z  
dc.date.issued
2021-11  
dc.identifier.citation
Falco, Juan Ignacio; Hauser, Natalia; Scivetti, Nicolás; Reimold, Wolf Uwe; Schmitt, Ralf Thomas; et al.; Upper Triassic to Middle Jurassic magmatic evolution of northern Patagonia: Insights from the tectonic and crustal evolution of the Los Menucos area, North Patagonian Massif, Argentina; Elsevier Ltd.; Journal of South American Earth Sciences; 113; 11-2021; 1-15  
dc.identifier.issn
0895-9811  
dc.identifier.uri
http://hdl.handle.net/11336/150160  
dc.description.abstract
The Upper Triassic magmatic and tectonic evolution of the central North Patagonian Massif is evaluated on the basis of the zircon U–Pb-Hf record and whole-rock geochemistry for volcanic rocks of the Los Menucos area. The sample analyzed in this study yields a 210 ± 3 Ma U–Pb zircon age, and the geochemical data for the Upper Triassic rocks are indicative of a high-K calk-alkaline arc-type magmatism, which also has adakitic signature related to melting of the subducted oceanic slab. The Hf isotope data for zircon from this sample, with ƐHf(T) values between – 6.1 and – 8.7, support a mixed source that may have involved melted slab and crustal reworking. A comprehensive evaluation of the Upper Triassic – Lower Jurassic magmatic and tectonic evolution of northern Patagonia is in agreement with the hypothesis of an Upper Triassic South Gondwanian flat-slab, which shifted the magmatic arc towards the continental interior at a time of crustal shortening and with arctype adakitic magmatism. The Lower Jurassic magmatic record is consistent with slab detachment and later roll-back, which would have promoted crustal extension and intraplate magmatism, and also shifted the arc magmatism to the paleo-trench. As a consequence of this stage, the Subcordilleran and North Patagonian batholiths were emplaced. The progressively – with time - less negative Hf isotope signatures for magmatic zircon are consistent with less evolved magmas generated throughout the Jurassic. The Upper Triassic-Middle Jurassic magmatism in northern Patagonia was part of a complex tectonic evolution, which involved crustal shortening and extension during plate reorganization during the critical period of Gondwana supercontinent break-up.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Ltd.  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
U-PB/HF ISOTOPES ON ZIRCON  
dc.subject
UPPER TRIASSIC FLAT-SLAB  
dc.subject
JURASSIC MAGMATISM  
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PRE-CUYANO  
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LOS MENUCOS  
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PATAGONIA  
dc.subject.classification
Geología  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Upper Triassic to Middle Jurassic magmatic evolution of northern Patagonia: Insights from the tectonic and crustal evolution of the Los Menucos area, North Patagonian Massif, 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
2021-12-03T19:22:28Z  
dc.journal.volume
113  
dc.journal.pagination
1-15  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Falco, Juan Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio. Universidad Nacional de Río Negro. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio; Argentina  
dc.description.fil
Fil: Hauser, Natalia. Universidad de Brasilia; Brasil  
dc.description.fil
Fil: Scivetti, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; Argentina  
dc.description.fil
Fil: Reimold, Wolf Uwe. Universidad de Brasilia; Brasil  
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Fil: Schmitt, Ralf Thomas. Museum Für Naturkunde. Leibniz-Institut Für Evolutions; Alemania  
dc.description.fil
Fil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina  
dc.journal.title
Journal of South American Earth Sciences  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://doi.org/10.1016/j.jsames.2021.103631  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981121004764?via%3Dihub