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dc.contributor.author
Martina, Federico  
dc.contributor.author
Viramonte, Jose Maria  
dc.contributor.author
Astini, Ricardo Alfredo  
dc.contributor.author
Martins Pimentel, Márcio  
dc.contributor.author
Dantas, Elton Luiz  
dc.date.available
2018-07-31T13:37:02Z  
dc.date.issued
2011-03  
dc.identifier.citation
Martina, Federico; Viramonte, Jose Maria; Astini, Ricardo Alfredo; Martins Pimentel, Márcio; Dantas, Elton Luiz; Mississippian volcanism in the south-central Andes: New U-Pb SHRIMP zircon geochronology and whole-rock geochemistry; Elsevier Science; Gondwana Research; 19; 2; 3-2011; 524-534  
dc.identifier.issn
1342-937X  
dc.identifier.uri
http://hdl.handle.net/11336/53567  
dc.description.abstract
In the northern extension of the Famatina and the southern Puna (NW Argentina) prominent rhyolitic volcanic rocks traditionally referred to as Ordovician are exposed, resting on metamorphic basement and covered by thick Late Paleozoic siliciclastic successions. We report new U-Pb SHRIMP ages from these rhyolites that show them to be of Mississippian (348-342Ma) age, thus identifying a previously unknown volcanic event in this portion of western Gondwana. Whole-rock geochemistry and Sr-Nd isotopic analyses suggest a crustal source for these rocks but with a juvenile input (εNd(t) between -2.91 and -0.3, and TDM values between 1.09 and 1.1Ga). This is different from the Early Paleozoic magmatism of western Argentina where crustal recycling took place without any involvement of mantle material. The Carboniferous magmatism is compatible with an extensional environment developed along the Terra Australis accretionary orogen as a result of tectonic switching processes. These rhyolites may be related to the coeval Mississippian A-type granites exposed to the east, in the Sierras Pampeanas, confirming the regional character of this magmatism.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Mississippian Rhyolites  
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Tectonic Switching  
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U-Pb Shrimp Zircon Geochronology  
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Western Gondwana Margin  
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Whole-Rock Geochemistry  
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Meteorología y Ciencias Atmosféricas  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Mississippian volcanism in the south-central Andes: New U-Pb SHRIMP zircon geochronology and whole-rock geochemistry  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-07-23T17:28:23Z  
dc.journal.volume
19  
dc.journal.number
2  
dc.journal.pagination
524-534  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Martina, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina  
dc.description.fil
Fil: Viramonte, Jose Maria. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Instituto Geonorte; Argentina  
dc.description.fil
Fil: Astini, Ricardo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina  
dc.description.fil
Fil: Martins Pimentel, Márcio. Universidade do Brasília; Brasil  
dc.description.fil
Fil: Dantas, Elton Luiz. Universidade do Brasília; Brasil  
dc.journal.title
Gondwana Research  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1342937X10001413  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.gr.2010.07.004