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Rapalini, A.E.; Peroni, J.; Luppo, T.; Tassone, A.; Cerredo, M.E.; Esteban, F.; Lippai, H.; Franciscovilas, J. "Palaeomagnetism of Mesozoic magmatic bodies of the Fuegian Cordillera: Implications for the formation of the Patagonian Orocline" (2016) Geological Society Special Publication. 425(1):65-80
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Abstract:

It is not known whether the Patagonian Orocline, the major bend of the southern Andes at the southern tip of South America, is a primary or secondary feature. Palaeomagnetic data along the Patagonian Orocline are still too scarce to provide a reliable and unambiguous answer to this question. New palaeomagnetic results on Late Jurassic-Late Cretaceous magmatic units along the central segment of the Fuegian Cordillera are reported. Data from four Late Cretaceous small intrusions and three sites on Late Jurassic-Early Cretaceous metabasalts and metagabbros showed anticlockwise declination deviations between 218 and 468 with respect to South America. From these and previous data, a picture of a nearly homogeneous post-Late Cretaceous regional rotation of the central Fuegian Cordillera is suggested. This supports a model of nearly 308 of anticlockwise secondary bending of the Patagonian Orocline since the Late Cretaceous (72 Ma). Lack of rotation of post-50 Ma sedimentary rocks exposed to the north of our study region, and larger rotations (of c. 908) reported to the south of it suggest that a geographical and/or temporal progression of rotation values from south to north in the Fuegian part of the Patagonian Orocline should be investigated. © 2016 The Author(s).

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Documento: Artículo
Título:Palaeomagnetism of Mesozoic magmatic bodies of the Fuegian Cordillera: Implications for the formation of the Patagonian Orocline
Autor:Rapalini, A.E.; Peroni, J.; Luppo, T.; Tassone, A.; Cerredo, M.E.; Esteban, F.; Lippai, H.; Franciscovilas, J.
Filiación:Instituto de Geociencias Básicas Aplicadas y Ambientales de Buenos Aires (IGEBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Conicet, Argentina
Área Geofísica, Dirección de Recursos Geológico-Mineros, Servicio Geológico y Minero Argentino (SEGEMAR), Buenos Aires, Argentina
Palabras clave:cordillera; igneous intrusion; Jurassic-Cretaceous boundary; magma; Mesozoic; metabasalt; metagabbro; paleomagnetism; Andes; Patagonia
Año:2016
Volumen:425
Número:1
Página de inicio:65
Página de fin:80
DOI: http://dx.doi.org/10.1144/SP425.3
Título revista:Geological Society Special Publication
Título revista abreviado:Geol. Soc. Spec. Publ.
ISSN:03058719
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v425_n1_p65_Rapalini

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Citas:

---------- APA ----------
Rapalini, A.E., Peroni, J., Luppo, T., Tassone, A., Cerredo, M.E., Esteban, F., Lippai, H.,..., Franciscovilas, J. (2016) . Palaeomagnetism of Mesozoic magmatic bodies of the Fuegian Cordillera: Implications for the formation of the Patagonian Orocline. Geological Society Special Publication, 425(1), 65-80.
http://dx.doi.org/10.1144/SP425.3
---------- CHICAGO ----------
Rapalini, A.E., Peroni, J., Luppo, T., Tassone, A., Cerredo, M.E., Esteban, F., et al. "Palaeomagnetism of Mesozoic magmatic bodies of the Fuegian Cordillera: Implications for the formation of the Patagonian Orocline" . Geological Society Special Publication 425, no. 1 (2016) : 65-80.
http://dx.doi.org/10.1144/SP425.3
---------- MLA ----------
Rapalini, A.E., Peroni, J., Luppo, T., Tassone, A., Cerredo, M.E., Esteban, F., et al. "Palaeomagnetism of Mesozoic magmatic bodies of the Fuegian Cordillera: Implications for the formation of the Patagonian Orocline" . Geological Society Special Publication, vol. 425, no. 1, 2016, pp. 65-80.
http://dx.doi.org/10.1144/SP425.3
---------- VANCOUVER ----------
Rapalini, A.E., Peroni, J., Luppo, T., Tassone, A., Cerredo, M.E., Esteban, F., et al. Palaeomagnetism of Mesozoic magmatic bodies of the Fuegian Cordillera: Implications for the formation of the Patagonian Orocline. Geol. Soc. Spec. Publ. 2016;425(1):65-80.
http://dx.doi.org/10.1144/SP425.3