Paleomagnetism of Upper Triassic rocks in the Los Colorados hill section, Mendoza province, Argentina

Different authors have highlighted a systematic disagreement between Late Carboniferous-Triassic paleomagnetic poles (PPs) for Gondwanaland and Laurasia when they are repositioned in a classical reconstruction prior to the breakup of Pangea A. This disagreement has been interpreted in geodynamic ter...

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Autores principales: Vizán, H., Ixer, R., Turner, P., Cortés, J.M., Cladera, G.
Formato: JOUR
Materias:
Argentina
Late Triassic
Paleomagnetism
Pangea
Precordillera
paleomagnetism
Pangaea
polar wandering
Triassic
Mendoza
South America
Western Hemisphere
World
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08959811_v18_n1_p41_Vizan
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_08959811_v18_n1_p41_Vizan2023-10-03T15:42:37Z Paleomagnetism of Upper Triassic rocks in the Los Colorados hill section, Mendoza province, Argentina Vizán, H. Ixer, R. Turner, P. Cortés, J.M. Cladera, G. Argentina Late Triassic Paleomagnetism Pangea Precordillera paleomagnetism Pangaea polar wandering Triassic Argentina Mendoza Precordillera South America Western Hemisphere World Different authors have highlighted a systematic disagreement between Late Carboniferous-Triassic paleomagnetic poles (PPs) for Gondwanaland and Laurasia when they are repositioned in a classical reconstruction prior to the breakup of Pangea A. This disagreement has been interpreted in geodynamic terms or as an evidence of non-dipole components of the geomagnetic field. Such analyses have been made using data on South American PPs published approximately 25 years ago and obtained using outdated methodologies. In this article, the authors present new Late Triassic paleomagnetic data from rocks that crop out in the Pre-Andean ranges (Precordillera) of Mendoza province (Argentina). Samples of different lithologies were taken from two limbs of a doubly plunging syncline, and several field tests of paleomagnetic stability were applied. The results indicate primary site mean directions that yield a PP with geographic coordinates and statistical parameters as follows: Lat.=76°S, Lon.=280°E, N=12, R=11.63, α95=8°, K=30.2. This PP agrees with mean PPs of Laurasia of similar ages in different models of Pangea A, indicating that the hypothesis of a dipolar paleomagnetic field could be valid for the Late Triassic. © 2004 Elsevier Ltd. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08959811_v18_n1_p41_Vizan
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Late Triassic
Paleomagnetism
Pangea
Precordillera
paleomagnetism
Pangaea
polar wandering
Triassic
Argentina
Mendoza
Precordillera
South America
Western Hemisphere
World
spellingShingle Argentina
Late Triassic
Paleomagnetism
Pangea
Precordillera
paleomagnetism
Pangaea
polar wandering
Triassic
Argentina
Mendoza
Precordillera
South America
Western Hemisphere
World
Vizán, H.
Ixer, R.
Turner, P.
Cortés, J.M.
Cladera, G.
Paleomagnetism of Upper Triassic rocks in the Los Colorados hill section, Mendoza province, Argentina
topic_facet Argentina
Late Triassic
Paleomagnetism
Pangea
Precordillera
paleomagnetism
Pangaea
polar wandering
Triassic
Argentina
Mendoza
Precordillera
South America
Western Hemisphere
World
description Different authors have highlighted a systematic disagreement between Late Carboniferous-Triassic paleomagnetic poles (PPs) for Gondwanaland and Laurasia when they are repositioned in a classical reconstruction prior to the breakup of Pangea A. This disagreement has been interpreted in geodynamic terms or as an evidence of non-dipole components of the geomagnetic field. Such analyses have been made using data on South American PPs published approximately 25 years ago and obtained using outdated methodologies. In this article, the authors present new Late Triassic paleomagnetic data from rocks that crop out in the Pre-Andean ranges (Precordillera) of Mendoza province (Argentina). Samples of different lithologies were taken from two limbs of a doubly plunging syncline, and several field tests of paleomagnetic stability were applied. The results indicate primary site mean directions that yield a PP with geographic coordinates and statistical parameters as follows: Lat.=76°S, Lon.=280°E, N=12, R=11.63, α95=8°, K=30.2. This PP agrees with mean PPs of Laurasia of similar ages in different models of Pangea A, indicating that the hypothesis of a dipolar paleomagnetic field could be valid for the Late Triassic. © 2004 Elsevier Ltd. All rights reserved.
format JOUR
author Vizán, H.
Ixer, R.
Turner, P.
Cortés, J.M.
Cladera, G.
author_facet Vizán, H.
Ixer, R.
Turner, P.
Cortés, J.M.
Cladera, G.
author_sort Vizán, H.
title Paleomagnetism of Upper Triassic rocks in the Los Colorados hill section, Mendoza province, Argentina
title_short Paleomagnetism of Upper Triassic rocks in the Los Colorados hill section, Mendoza province, Argentina
title_full Paleomagnetism of Upper Triassic rocks in the Los Colorados hill section, Mendoza province, Argentina
title_fullStr Paleomagnetism of Upper Triassic rocks in the Los Colorados hill section, Mendoza province, Argentina
title_full_unstemmed Paleomagnetism of Upper Triassic rocks in the Los Colorados hill section, Mendoza province, Argentina
title_sort paleomagnetism of upper triassic rocks in the los colorados hill section, mendoza province, argentina
url http://hdl.handle.net/20.500.12110/paper_08959811_v18_n1_p41_Vizan
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AT ixerr paleomagnetismofuppertriassicrocksintheloscoloradoshillsectionmendozaprovinceargentina
AT turnerp paleomagnetismofuppertriassicrocksintheloscoloradoshillsectionmendozaprovinceargentina
AT cortesjm paleomagnetismofuppertriassicrocksintheloscoloradoshillsectionmendozaprovinceargentina
AT claderag paleomagnetismofuppertriassicrocksintheloscoloradoshillsectionmendozaprovinceargentina
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