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dc.contributor.author
Castillo, Paula
dc.contributor.author
Mark Fanning, C.
dc.contributor.author
Pankhurst, Robert J.
dc.contributor.author
Hervé, Francisco
dc.contributor.author
Rapela, Carlos Washington
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dc.date.available
2018-06-19T14:54:02Z
dc.date.issued
2017-09
dc.identifier.citation
Castillo, Paula; Mark Fanning, C.; Pankhurst, Robert J.; Hervé, Francisco; Rapela, Carlos Washington; Zircon O- and Hf-isotope constraints on the genesis and tectonic significance of Permian magmatism in Patagonia
; Geological Soc Publ House; Journal of the Geological Society; 174; 5; 9-2017; 803-816
dc.identifier.issn
0016-7649
dc.identifier.uri
http://hdl.handle.net/11336/49238
dc.description.abstract
The genesis of Permian magmatism in southern South America is actively debated, particularly in relation to the origin of Patagonia. U-Pb zircon ages of c. 255 Ma for igneous rocks from the basement of Tierra del Fuego are the first evidence for southerly prolongation of this magmatism. Zircon in these rocks has εHft values <-1 and δ18O > 7.4‰, indicating recycling of Cambrian rocks. Permian granites in the north of the North Patagonian Massif record mantle-like δ18O magmatic input at c. 280 and 255 Ma, but reworking of upper crust between these two events, paralleling the recognized deformational history. In northwestern Patagonia, Early Permian granitic rocks have zircon with eHft values ranging from +0.1 to -7.2, and δ18O > 6.2‰, suggesting continuity of the Permian magmatic belt along the western margin of South America farther north. Comparison with a sample from the Sierra de la Ventana suggests melting of similar crust on both sides of the Patagonia-South American hypothetical suture. These features, together with other geological considerations, are consistent with an autochthonous or parautochthonous origin of northern Patagonia and connection between southern Patagonia and the Antarctic Peninsula in late Palaeozoic time.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geological Soc Publ House
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Permian Magmatism
dc.subject
Patagonia
dc.subject
Zircon O-Isotopes
dc.subject
Zircon Hf-Isotopes
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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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
Zircon O- and Hf-isotope constraints on the genesis and tectonic significance of Permian magmatism in Patagonia
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-06-18T21:36:53Z
dc.journal.volume
174
dc.journal.number
5
dc.journal.pagination
803-816
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Castillo, Paula. The Australian National University; Australia
dc.description.fil
Fil: Mark Fanning, C.. The Australian National University; Australia
dc.description.fil
Fil: Pankhurst, Robert J.. British Geological Survey; Qatar
dc.description.fil
Fil: Hervé, Francisco. Universidad Andrés Bello; Chile
dc.description.fil
Fil: Rapela, Carlos Washington. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.journal.title
Journal of the Geological Society
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1144/jgs2016-152
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://jgs.lyellcollection.org/content/174/5/803
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