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Abstract:

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.

Registro:

Documento: Artículo
Título:Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica
Autor:Valencio, D.A.; Mendía, JosE.; Vilas, J.F.
Filiación:Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales ; Ciudad Universitaria, Pabellón 2, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Cientificas y Técnicas, Rivadavia, 1917 Buenos Aires, Argentina
Servicio Geológico Nacional, Santa Fe, 1548, Argentina
Palabras clave:Cape Spring; Deception Island; King George Island; oroclinal bending; polar movementigneous rocks
Año:1979
Volumen:45
Número:1
Página de inicio:61
Página de fin:68
DOI: http://dx.doi.org/10.1016/0012-821X(79)90107-9
Título revista:Earth and Planetary Science Letters
Título revista abreviado:Earth Plan. Sci. Lett.
ISSN:0012821X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0012821X_v45_n1_p61_Valencio

Referencias:

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  • Codignotto, Lorente, Mendía, Olivero, Spikerman, Geología del Cabo Spring e islas Pingüino, César y Leopardo (1978) Contrib. Inst. Antárt. Argentino, 216, p. 41
  • Hawkes, The geology of the South Shetland Islands, II. The geology and petrology of Deception Island, Falkland Islands Dependencies (1961) Br. Antarct. Surv., Sci. Rep., 27
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Citas:

---------- APA ----------
Valencio, D.A., Mendía, JosE. & Vilas, J.F. (1979) . Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica. Earth and Planetary Science Letters, 45(1), 61-68.
http://dx.doi.org/10.1016/0012-821X(79)90107-9
---------- CHICAGO ----------
Valencio, D.A., Mendía, JosE., Vilas, J.F. "Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica" . Earth and Planetary Science Letters 45, no. 1 (1979) : 61-68.
http://dx.doi.org/10.1016/0012-821X(79)90107-9
---------- MLA ----------
Valencio, D.A., Mendía, JosE., Vilas, J.F. "Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica" . Earth and Planetary Science Letters, vol. 45, no. 1, 1979, pp. 61-68.
http://dx.doi.org/10.1016/0012-821X(79)90107-9
---------- VANCOUVER ----------
Valencio, D.A., Mendía, JosE., Vilas, J.F. Palaeomagnetism and KAr age of Mesozoic and Cenozoic igneous rocks from Antarctica. Earth Plan. Sci. Lett. 1979;45(1):61-68.
http://dx.doi.org/10.1016/0012-821X(79)90107-9