New paleomagnetic pole for the Upper Jurassic Chon Aike Formation of southern Argentina (South America): Testing the tectonic stability of Patagonia with respect to South America, and implications to Middle Jurassic-Early Cretaceous true polar wander

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A paleomagnetic pole and a new Ar-Ar date of 156.08 ± 0.05 Ma are reported for the Chon Aike Formation, an extensive plateau of ignimbrites, outcropping in the Deseado Massif (southern Patagonia, Argentina). The geographic coordinates and statistical parameters for the paleomagnetic pole, validated...

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Autores principales: Ruiz González, Víctor, Puigdomenech, Carla G., Renda, Emiliano M., Boltshauser, Bárbara, Somoza, Rubén, Vizán, Haroldo, Zaffarana, Claudia Beatriz, Taylor, Graeme K., Haller, Miguel J., Fernández, Raúl Roberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Naturales
Chon Aike Formation
Deseado Massif
South America
Paleomagnetism
Apparent polar wander path
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124537
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124537
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Chon Aike Formation
Deseado Massif
South America
Paleomagnetism
Apparent polar wander path
spellingShingle Ciencias Naturales
Chon Aike Formation
Deseado Massif
South America
Paleomagnetism
Apparent polar wander path
Ruiz González, Víctor
Puigdomenech, Carla G.
Renda, Emiliano M.
Boltshauser, Bárbara
Somoza, Rubén
Vizán, Haroldo
Zaffarana, Claudia Beatriz
Taylor, Graeme K.
Haller, Miguel J.
Fernández, Raúl Roberto
New paleomagnetic pole for the Upper Jurassic Chon Aike Formation of southern Argentina (South America): Testing the tectonic stability of Patagonia with respect to South America, and implications to Middle Jurassic-Early Cretaceous true polar wander
topic_facet Ciencias Naturales
Chon Aike Formation
Deseado Massif
South America
Paleomagnetism
Apparent polar wander path
description A paleomagnetic pole and a new Ar-Ar date of 156.08 ± 0.05 Ma are reported for the Chon Aike Formation, an extensive plateau of ignimbrites, outcropping in the Deseado Massif (southern Patagonia, Argentina). The geographic coordinates and statistical parameters for the paleomagnetic pole, validated by a reversal test, are: Lat. = 84.3° S, Long. = 191.3° E, A₉₅ = 8.6°, K = 13.3, N = 23. This pole shows a complete coherence with Late Jurassic and Early to mid-Cretaceous poles of South America, obtained exclusively from igneous rocks, avoiding any potential inclination shallowing. It is suggested that; a) southern Patagonia was an integral part of South America in the Late Jurassic; b) any reported vertical axis tectonic rotations must pre-date the Late Jurassic in this region; c) according to updated paleomagnetic data from igneous rocks, South America had very limited latitudinal drift between about 160 and 140 Ma; and, therefore, d) its apparent polar wander (APW) path, when compared with global apparent polar wander paths, does not support a large global shift or true polar wander (TPW) between 160 and 140 Ma.
format Articulo
Articulo
author Ruiz González, Víctor
Puigdomenech, Carla G.
Renda, Emiliano M.
Boltshauser, Bárbara
Somoza, Rubén
Vizán, Haroldo
Zaffarana, Claudia Beatriz
Taylor, Graeme K.
Haller, Miguel J.
Fernández, Raúl Roberto
author_facet Ruiz González, Víctor
Puigdomenech, Carla G.
Renda, Emiliano M.
Boltshauser, Bárbara
Somoza, Rubén
Vizán, Haroldo
Zaffarana, Claudia Beatriz
Taylor, Graeme K.
Haller, Miguel J.
Fernández, Raúl Roberto
author_sort Ruiz González, Víctor
title New paleomagnetic pole for the Upper Jurassic Chon Aike Formation of southern Argentina (South America): Testing the tectonic stability of Patagonia with respect to South America, and implications to Middle Jurassic-Early Cretaceous true polar wander
title_short New paleomagnetic pole for the Upper Jurassic Chon Aike Formation of southern Argentina (South America): Testing the tectonic stability of Patagonia with respect to South America, and implications to Middle Jurassic-Early Cretaceous true polar wander
title_full New paleomagnetic pole for the Upper Jurassic Chon Aike Formation of southern Argentina (South America): Testing the tectonic stability of Patagonia with respect to South America, and implications to Middle Jurassic-Early Cretaceous true polar wander
title_fullStr New paleomagnetic pole for the Upper Jurassic Chon Aike Formation of southern Argentina (South America): Testing the tectonic stability of Patagonia with respect to South America, and implications to Middle Jurassic-Early Cretaceous true polar wander
title_full_unstemmed New paleomagnetic pole for the Upper Jurassic Chon Aike Formation of southern Argentina (South America): Testing the tectonic stability of Patagonia with respect to South America, and implications to Middle Jurassic-Early Cretaceous true polar wander
title_sort new paleomagnetic pole for the upper jurassic chon aike formation of southern argentina (south america): testing the tectonic stability of patagonia with respect to south america, and implications to middle jurassic-early cretaceous true polar wander
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/124537
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