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

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, V., Puigdomenech, C.G., Renda, E.M., Boltshauser, B., Somoza, R., Vizán, H., Zaffarana, C.B., Taylor, G.K., Haller, M., Fernández, R.
Formato: JOUR
Materias:
Apparent polar wander path
Chon Aike Formation
Deseado Massif
Paleomagnetism
South America
Geomagnetism
Nitrogen compounds
Tectonics
Uranium compounds
Volcanic rocks
Sulfur compounds
apparent polar wander path
argon-argon dating
ignimbrite
Jurassic
outcrop
paleomagnetism
tectonic evolution
tectonic setting
Argentina
Patagonia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00401951_v750_n_p45_RuizGonzalez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00401951_v750_n_p45_RuizGonzalez2023-10-03T14:50:27Z 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 Ruiz González, V. Puigdomenech, C.G. Renda, E.M. Boltshauser, B. Somoza, R. Vizán, H. Zaffarana, C.B. Taylor, G.K. Haller, M. Fernández, R. Apparent polar wander path Chon Aike Formation Deseado Massif Paleomagnetism South America Geomagnetism Nitrogen compounds Tectonics Uranium compounds Volcanic rocks Apparent polar wander path Chon Aike Formation Deseado Massif Paleomagnetism South America Sulfur compounds apparent polar wander path argon-argon dating ignimbrite Jurassic outcrop paleomagnetism tectonic evolution tectonic setting Argentina Patagonia 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. © 2018 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00401951_v750_n_p45_RuizGonzalez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Apparent polar wander path
Chon Aike Formation
Deseado Massif
Paleomagnetism
South America
Geomagnetism
Nitrogen compounds
Tectonics
Uranium compounds
Volcanic rocks
Apparent polar wander path
Chon Aike Formation
Deseado Massif
Paleomagnetism
South America
Sulfur compounds
apparent polar wander path
argon-argon dating
ignimbrite
Jurassic
outcrop
paleomagnetism
tectonic evolution
tectonic setting
Argentina
Patagonia
spellingShingle Apparent polar wander path
Chon Aike Formation
Deseado Massif
Paleomagnetism
South America
Geomagnetism
Nitrogen compounds
Tectonics
Uranium compounds
Volcanic rocks
Apparent polar wander path
Chon Aike Formation
Deseado Massif
Paleomagnetism
South America
Sulfur compounds
apparent polar wander path
argon-argon dating
ignimbrite
Jurassic
outcrop
paleomagnetism
tectonic evolution
tectonic setting
Argentina
Patagonia
Ruiz González, V.
Puigdomenech, C.G.
Renda, E.M.
Boltshauser, B.
Somoza, R.
Vizán, H.
Zaffarana, C.B.
Taylor, G.K.
Haller, M.
Fernández, R.
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 Apparent polar wander path
Chon Aike Formation
Deseado Massif
Paleomagnetism
South America
Geomagnetism
Nitrogen compounds
Tectonics
Uranium compounds
Volcanic rocks
Apparent polar wander path
Chon Aike Formation
Deseado Massif
Paleomagnetism
South America
Sulfur compounds
apparent polar wander path
argon-argon dating
ignimbrite
Jurassic
outcrop
paleomagnetism
tectonic evolution
tectonic setting
Argentina
Patagonia
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. © 2018 Elsevier B.V.
format JOUR
author Ruiz González, V.
Puigdomenech, C.G.
Renda, E.M.
Boltshauser, B.
Somoza, R.
Vizán, H.
Zaffarana, C.B.
Taylor, G.K.
Haller, M.
Fernández, R.
author_facet Ruiz González, V.
Puigdomenech, C.G.
Renda, E.M.
Boltshauser, B.
Somoza, R.
Vizán, H.
Zaffarana, C.B.
Taylor, G.K.
Haller, M.
Fernández, R.
author_sort Ruiz González, V.
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
url http://hdl.handle.net/20.500.12110/paper_00401951_v750_n_p45_RuizGonzalez
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