Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica

A new analysis of palaeomagnetic data for igneous rocks from Deception Island, 25 de Mayo Island (King George Island) and Cape Spring, are given. K-Ar age determinations indicate that most of the igneous samples from 25 de Mayo Island included in the palaeomagnetic study are of Late Mesozoic/Early T...

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Autores principales:	Valencio, Daniel Alberto, Mendia, José Ernesto, Vilas, Juan Francisco A.
Publicado:	1979
Materias:	Cape Spring Deception Island King George Island oroclinal bending polar movementigneous rocks
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0012821X_v45_n1_p61_Valencio http://hdl.handle.net/20.500.12110/paper_0012821X_v45_n1_p61_Valencio
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_0012821X_v45_n1_p61_Valencio
record_format	dspace
spelling	paper:paper_0012821X_v45_n1_p61_Valencio2023-06-08T14:35:34Z Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica Valencio, Daniel Alberto Mendia, José Ernesto Vilas, Juan Francisco A. Cape Spring Deception Island King George Island oroclinal bending polar movementigneous rocks A new analysis of palaeomagnetic data for igneous rocks from Deception Island, 25 de Mayo Island (King George Island) and Cape Spring, are given. K-Ar age determinations indicate that most of the igneous samples from 25 de Mayo Island included in the palaeomagnetic study are of Late Mesozoic/Early Tertiary age. The significance of these palaeomagnetic-radiometric data on the hypothesis of oroclinal bending of the Antarctic Peninsula and on the apparent polar movement of Antarctica is discussed. The positions of palaeomagnetic poles for the Andean igneous complex indicate that there has not been any apparent post-Late Cretaceous/Early Tertiary oroclinal bending in the Antarctic Peninsula from 74°S to 62°S. A comparison of the positions of palaeomagnetic poles for Antarctica and Australia suggests that the direction of apparent polar movement relative to Antarctica reversed after the Miocene. © 1979. Fil:Valencio, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mendía, JosE. 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. 1979 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0012821X_v45_n1_p61_Valencio http://hdl.handle.net/20.500.12110/paper_0012821X_v45_n1_p61_Valencio
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cape Spring Deception Island King George Island oroclinal bending polar movementigneous rocks
spellingShingle	Cape Spring Deception Island King George Island oroclinal bending polar movementigneous rocks Valencio, Daniel Alberto Mendia, José Ernesto Vilas, Juan Francisco A. Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica
topic_facet	Cape Spring Deception Island King George Island oroclinal bending polar movementigneous rocks
description	A new analysis of palaeomagnetic data for igneous rocks from Deception Island, 25 de Mayo Island (King George Island) and Cape Spring, are given. K-Ar age determinations indicate that most of the igneous samples from 25 de Mayo Island included in the palaeomagnetic study are of Late Mesozoic/Early Tertiary age. The significance of these palaeomagnetic-radiometric data on the hypothesis of oroclinal bending of the Antarctic Peninsula and on the apparent polar movement of Antarctica is discussed. The positions of palaeomagnetic poles for the Andean igneous complex indicate that there has not been any apparent post-Late Cretaceous/Early Tertiary oroclinal bending in the Antarctic Peninsula from 74°S to 62°S. A comparison of the positions of palaeomagnetic poles for Antarctica and Australia suggests that the direction of apparent polar movement relative to Antarctica reversed after the Miocene. © 1979.
author	Valencio, Daniel Alberto Mendia, José Ernesto Vilas, Juan Francisco A.
author_facet	Valencio, Daniel Alberto Mendia, José Ernesto Vilas, Juan Francisco A.
author_sort	Valencio, Daniel Alberto
title	Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica
title_short	Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica
title_full	Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica
title_fullStr	Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica
title_full_unstemmed	Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica
title_sort	palaeomagnetism and kar age of mesozoic and cenozoic igneous rocks from antarctica
publishDate	1979
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0012821X_v45_n1_p61_Valencio http://hdl.handle.net/20.500.12110/paper_0012821X_v45_n1_p61_Valencio
work_keys_str_mv	AT valenciodanielalberto palaeomagnetismandkarageofmesozoicandcenozoicigneousrocksfromantarctica AT mendiajoseernesto palaeomagnetismandkarageofmesozoicandcenozoicigneousrocksfromantarctica AT vilasjuanfranciscoa palaeomagnetismandkarageofmesozoicandcenozoicigneousrocksfromantarctica
_version_	1768546473983606784

Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica

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