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:todo:paper_0012821X_v45_n1_p61_Valencio 2023-10-29T02:31:57+01:00 Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica Valencio, D.A. Mendía, JosE. Vilas, J.F. https://hdl.handle.net/20.500.12110/paper_0012821X_v45_n1_p61_Valencio unknown http://hdl.handle.net/20.500.12110/paper_0012821X_v45_n1_p61_Valencio info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Cape Spring Deception Island King George Island oroclinal bending polar movementigneous rocks JOUR ftunibueairesbd https://doi.org/20.500.12110/paper_0012821X_v45_n1_p61_Valencio 2023-10-05T01:14:44Z 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. Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island King George Island Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
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Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
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ftunibueairesbd |
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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, D.A. Mendía, JosE. Vilas, J.F. 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. |
format |
Journal/Newspaper |
author |
Valencio, D.A. Mendía, JosE. Vilas, J.F. |
author_facet |
Valencio, D.A. Mendía, JosE. Vilas, J.F. |
author_sort |
Valencio, D.A. |
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 |
url |
https://hdl.handle.net/20.500.12110/paper_0012821X_v45_n1_p61_Valencio |
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 |
http://hdl.handle.net/20.500.12110/paper_0012821X_v45_n1_p61_Valencio |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
op_doi |
https://doi.org/20.500.12110/paper_0012821X_v45_n1_p61_Valencio |
_version_ |
1781052864393641984 |