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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ftunibueairesbd:paper:paper_0012821X_v45_n1_p61_Valencio 2023-05-15T13:42:26+02:00 Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica Valencio, Daniel Alberto Mendia, José Ernesto Vilas, Juan Francisco A. 1979 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0012821X_v45_n1_p61_Valencio https://hdl.handle.net/20.500.12110/paper_0012821X_v45_n1_p61_Valencio unknown 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 Cape Spring Deception Island King George Island oroclinal bending polar movementigneous rocks 1979 ftunibueairesbd https://doi.org/20.500.12110/paper_0012821X_v45_n1_p61_Valencio 2023-02-16T02:01:10Z 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. Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island King George Island Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) Antarctic Antarctic Peninsula Argentina Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) King George Island The Antarctic |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
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. 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. |
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 https://hdl.handle.net/20.500.12110/paper_0012821X_v45_n1_p61_Valencio |
long_lat |
ENVELOPE(-58.000,-58.000,-62.083,-62.083) ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
geographic |
25 de Mayo Antarctic Antarctic Peninsula Argentina Deception Island King George Island The Antarctic |
geographic_facet |
25 de Mayo Antarctic Antarctic Peninsula Argentina Deception Island King George Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island King George Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island King George Island |
op_relation |
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 |
op_doi |
https://doi.org/20.500.12110/paper_0012821X_v45_n1_p61_Valencio |
_version_ |
1766167802763280384 |