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dc.contributor.author
Permuy Vidal, Conrado
dc.contributor.author
Moreira, Pilar
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Guido, Diego Martin
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Fanning, C.M.
dc.date.available
2018-01-09T19:46:36Z
dc.date.issued
2014-06
dc.identifier.citation
Fanning, C.M.; Guido, Diego Martin; Moreira, Pilar; Permuy Vidal, Conrado; Linkages between the southern Patagonia Pre-Permian basements: new insights from detrital zircons U-Pb SHRIMP ages from the Cerro Negro District; Universidad de Barcelona; Geologica Acta; 12; 2; 6-2014; 137-150
dc.identifier.issn
1695-6133
dc.identifier.uri
http://hdl.handle.net/11336/32718
dc.description.abstract
The Patagonian basement rocks are dominated by Precambrian to Early Paleozoic metamorphic rocks intruded by Paleozoic granitoids. Recently discovered basement rocks in the Cerro Negro District are characterized mainly by quartz-muscovite-chlorite schists; the metamorphic grade reaches greenschist facies (biotite-garnet grade) with a regional S1 schistosity subparallel to the original sedimentary structure S0 and a secondary non-penetrative S2 foliation. New detrital zircon U-Pb geochronology shows that maximum depositional ages for detrital zircons are Devonian, ages of 379 ± 4Ma. These results suggest that the Cerro Negro basement rocks are the youngest basement in the Deseado Massif, overlapping some detrital zircon ages in the eastern Andean Metamorphic Complex in the Andean region. Most of detrital zircons are igneous in origin with a major peak around ~396Ma, probably sourced from the Devonian granitoids of the Río Deseado Complex (El Laurel and Bahía Laura granites) and equivalent northern Patagonia granitoids (e.g. Colan Conhué and Lago Lolog granites). Secondary peaks correspond to Ordovician to Silurian ages, being the Río Deseado Complex and La Modesta Formation (and their igneous contributors) the possible sources of the zircons. The minor oldest peaks yield Cambrian-Neoproterozoic; Mesoproterozoic and Paleoproterozoic-Archean ages, evidencing a common source from the interior of Gondwana. The results provide new insights about the relationships between the pre-Permian metasedimentary rocks of the extra-Andean and Andean region during Mid-Paleozoic age
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Universidad de Barcelona
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Patagonia
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Deseado Massif
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Basement
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U-Pb Shrimp
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Cerro Negro
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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
Linkages between the southern Patagonia Pre-Permian basements: new insights from detrital zircons U-Pb SHRIMP ages from the Cerro Negro District
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-01-08T18:41:57Z
dc.journal.volume
12
dc.journal.number
2
dc.journal.pagination
137-150
dc.journal.pais
España
dc.journal.ciudad
Barcelona
dc.description.fil
Fil: Permuy Vidal, Conrado. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Instituto de Recursos Minerales. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto de Recursos Minerales; Argentina
dc.description.fil
Fil: Moreira, Pilar. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Instituto de Recursos Minerales. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto de Recursos Minerales; Argentina
dc.description.fil
Fil: Guido, Diego Martin. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Instituto de Recursos Minerales. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto de Recursos Minerales; Argentina
dc.description.fil
Fil: Fanning, C.M.. The Australian National University. Camberra; Australia
dc.journal.title
Geologica Acta
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://revistes.ub.edu/index.php/GEOACTA/article/view/105.000002082
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info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1344/105.000002082
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