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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2004
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v18_n1_p41_Vizan http://hdl.handle.net/20.500.12110/paper_08959811_v18_n1_p41_Vizan |
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paper:paper_08959811_v18_n1_p41_Vizan2023-06-08T15:48:14Z Paleomagnetism of Upper Triassic rocks in the Los Colorados hill section, Mendoza province, Argentina 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 Such analyses have been made using data on South American PPs published approximately 25 years ago and obtained using outdated methodologies.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. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v18_n1_p41_Vizan 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 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. |
| 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 |
| publishDate |
2004 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v18_n1_p41_Vizan http://hdl.handle.net/20.500.12110/paper_08959811_v18_n1_p41_Vizan |
| _version_ |
1768541803160535040 |