Palaeomagnetism of Jurassic and Cretaceous rocks from South America and the tectonics of the central Andes

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Paleomagnetic data for Jurassic and Cretaceous rocks from the South American and Patagonian platforms and the Andean chain were recomputed or reevaluated. The reliable data for Lower and Upper Cretaceous rocks from the Andean Chain for sampling sites situated north of Arica do not support the abrupt...

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Autores principales: Oviedo, Eduardo Sergio, Valencio, Daniel Alberto, Vilas, Juan Francisco A.
Publicado: 1991
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00721077_v265_n_p291_Oviedo
http://hdl.handle.net/20.500.12110/paper_00721077_v265_n_p291_Oviedo
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_00721077_v265_n_p291_Oviedo2023-06-08T15:06:31Z Palaeomagnetism of Jurassic and Cretaceous rocks from South America and the tectonics of the central Andes Oviedo, Eduardo Sergio Valencio, Daniel Alberto Vilas, Juan Francisco A. Paleomagnetic data for Jurassic and Cretaceous rocks from the South American and Patagonian platforms and the Andean chain were recomputed or reevaluated. The reliable data for Lower and Upper Cretaceous rocks from the Andean Chain for sampling sites situated north of Arica do not support the abrupt change in the trend of the Andes north of Arica (Bolivian orocline) as being post-orogenic. The distribution of the Late Cretaceous paleomagnetic poles for South America, including those for the Upper Cretaceous rocks exposed in the Andean chain north of Arica, can be interpreted as the effect of an apparent polar shift of this continent. The paleomagnetic data of the Early and Late Cretaceous rocks from the Andean chain exposed north of Arica can then be explained by continental-scale geodynamic processes. Fil:Oviedo, E.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Valencio, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vilas, J.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1991 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00721077_v265_n_p291_Oviedo http://hdl.handle.net/20.500.12110/paper_00721077_v265_n_p291_Oviedo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Paleomagnetic data for Jurassic and Cretaceous rocks from the South American and Patagonian platforms and the Andean chain were recomputed or reevaluated. The reliable data for Lower and Upper Cretaceous rocks from the Andean Chain for sampling sites situated north of Arica do not support the abrupt change in the trend of the Andes north of Arica (Bolivian orocline) as being post-orogenic. The distribution of the Late Cretaceous paleomagnetic poles for South America, including those for the Upper Cretaceous rocks exposed in the Andean chain north of Arica, can be interpreted as the effect of an apparent polar shift of this continent. The paleomagnetic data of the Early and Late Cretaceous rocks from the Andean chain exposed north of Arica can then be explained by continental-scale geodynamic processes.
author Oviedo, Eduardo Sergio
Valencio, Daniel Alberto
Vilas, Juan Francisco A.
spellingShingle Oviedo, Eduardo Sergio
Valencio, Daniel Alberto
Vilas, Juan Francisco A.
Palaeomagnetism of Jurassic and Cretaceous rocks from South America and the tectonics of the central Andes
author_facet Oviedo, Eduardo Sergio
Valencio, Daniel Alberto
Vilas, Juan Francisco A.
author_sort Oviedo, Eduardo Sergio
title Palaeomagnetism of Jurassic and Cretaceous rocks from South America and the tectonics of the central Andes
title_short Palaeomagnetism of Jurassic and Cretaceous rocks from South America and the tectonics of the central Andes
title_full Palaeomagnetism of Jurassic and Cretaceous rocks from South America and the tectonics of the central Andes
title_fullStr Palaeomagnetism of Jurassic and Cretaceous rocks from South America and the tectonics of the central Andes
title_full_unstemmed Palaeomagnetism of Jurassic and Cretaceous rocks from South America and the tectonics of the central Andes
title_sort palaeomagnetism of jurassic and cretaceous rocks from south america and the tectonics of the central andes
publishDate 1991
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00721077_v265_n_p291_Oviedo
http://hdl.handle.net/20.500.12110/paper_00721077_v265_n_p291_Oviedo
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AT valenciodanielalberto palaeomagnetismofjurassicandcretaceousrocksfromsouthamericaandthetectonicsofthecentralandes
AT vilasjuanfranciscoa palaeomagnetismofjurassicandcretaceousrocksfromsouthamericaandthetectonicsofthecentralandes
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