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Abstract:

New U-Pb and 40Ar/39Ar age data from deformed and undeformed granitoids of the North Patagonian Massif establish the presence of Early Cambrian and widespread Ordovician magmatism in northern Patagonia. These data suggest that the Pampean (Cambrian) and Famatinian (Ordovician) magmatic belts of the Sierras Pampeanas are continuous into Patagonia. SHRIMP U-Pb age spectra from detrital zircons of Cambro-Ordovician metasedimentary rocks show patterns very similar to those from equivalent units of the Pampia block, over 500 km farther north. These results suggest that the North Patagonian Massif was likely part of the South American margin of Gondwana in the early Palaeozoic and strongly argue in favour of an authochtonous or para-autochthonous origin for this block. © 2013 John Wiley & Sons Ltd.

Registro:

Documento: Artículo
Título:The South American ancestry of the North Patagonian Massif: Geochronological evidence for an autochthonous origin?
Autor:Rapalini, A.E.; de Luchi, M.L.; Tohver, E.; Cawood, P.A.
Filiación:Inst. de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires (IGEBA), Dept. Cs. Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires-CONICET, Pabellón 2, Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
Inst. de Geocronología y Geología Isotópica (INGEIS), Universidad de Buenos Aires-CONICET, Ciudad Universitaria, Buenos Aires, Argentina
School of Earth and Environment, University of Western Australia - M004, 35 Stirling Hwy, Crawley, WA 6009, Australia
Department of Earth Sciences, University of St. Andrews Fife, KY16 9AL, Scotland, United Kingdom
Palabras clave:ancestry; argon-argon dating; autochthon; Cambrian; geochronology; metasedimentary rock; Ordovician; SHRIMP dating; uranium-lead dating; zircon; Patagonia
Año:2013
Volumen:25
Número:4
Página de inicio:337
Página de fin:342
DOI: http://dx.doi.org/10.1111/ter.12043
Título revista:Terra Nova
Título revista abreviado:Terra Nova
ISSN:09544879
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09544879_v25_n4_p337_Rapalini

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Citas:

---------- APA ----------
Rapalini, A.E., de Luchi, M.L., Tohver, E. & Cawood, P.A. (2013) . The South American ancestry of the North Patagonian Massif: Geochronological evidence for an autochthonous origin?. Terra Nova, 25(4), 337-342.
http://dx.doi.org/10.1111/ter.12043
---------- CHICAGO ----------
Rapalini, A.E., de Luchi, M.L., Tohver, E., Cawood, P.A. "The South American ancestry of the North Patagonian Massif: Geochronological evidence for an autochthonous origin?" . Terra Nova 25, no. 4 (2013) : 337-342.
http://dx.doi.org/10.1111/ter.12043
---------- MLA ----------
Rapalini, A.E., de Luchi, M.L., Tohver, E., Cawood, P.A. "The South American ancestry of the North Patagonian Massif: Geochronological evidence for an autochthonous origin?" . Terra Nova, vol. 25, no. 4, 2013, pp. 337-342.
http://dx.doi.org/10.1111/ter.12043
---------- VANCOUVER ----------
Rapalini, A.E., de Luchi, M.L., Tohver, E., Cawood, P.A. The South American ancestry of the North Patagonian Massif: Geochronological evidence for an autochthonous origin?. Terra Nova. 2013;25(4):337-342.
http://dx.doi.org/10.1111/ter.12043