Artículo
Vilas, J.F.A. "Palaeomagnetism of Some Igneous Rocks of the Middle Jurassic Chon‐Aike Formation from Estancia La Reconquista, Province of Santa Cruz, Argentina" (1974) Geophysical Journal of the Royal Astronomical Society. 39(3):511-522
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Abstract:
New palaeomagnetic data for the Middle Jurassic Chon‐Aike Formation from 15 different geological units of rhyolitic porphyries, keratophyres, ignimbrites, pumicites and associated tuffs exposed at the Estancia La Reconquista, Province of Santa Cruz (48°10′S, 68°50′W), Argentina, are given. After cleaning, all the units show normally polarized magnetic remanence and the mean of their virtual geomagnetic poles is not coincident with the mean of the virtual geomagnetic poles derived from the Puerto Deseado (Valencio & Vilas) and Camarones (Creer et al.) areas. It is proposed that the most reliable palaeomagnetic pole for the Chon‐Aike Formation is that given by the mean of the 54 virtual geomagnetic poles derived from all three areas, namely Puerto Deseado, Camarones and Estancia La Reconquista. It is situated at 85° S, 163° W, with α95= 6°. Comparison of the position of this palaeomagnetic pole with the mean of the African Jurassic palaeomagnetic poles suggests that the separation of South America and Africa occurred after the Middle Jurassic. Copyright © 1974, Wiley Blackwell. All rights reserved
Registro:
| Documento: | Artículo |
| Título: | Palaeomagnetism of Some Igneous Rocks of the Middle Jurassic Chon‐Aike Formation from Estancia La Reconquista, Province of Santa Cruz, Argentina |
| Autor: | Vilas, J.F.A. |
| Filiación: | Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina Ciudad Universitaria, Pabellón 2, Buenos Aires, Argentina |
| Año: | 1974 |
| Volumen: | 39 |
| Número: | 3 |
| Página de inicio: | 511 |
| Página de fin: | 522 |
| DOI: | http://dx.doi.org/10.1111/j.1365-246X.1974.tb05469.x |
| Título revista: | Geophysical Journal of the Royal Astronomical Society |
| Título revista abreviado: | Geophys. J. Int. |
| ISSN: | 00168009 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00168009_v39_n3_p511_Vilas |
Referencias:
- Briden, J.C., Recurrent continental drift of Gondwanaland (1967) Nature, 215, pp. 1334-1339
- Cazeneuve, H., Datación de una toba de la formación Chon‐Aike (Jurásico de Santa Cruz, Patagonia) por el método de potasio argón (1965) Améghiniana, 4, pp. 156-158
- Creer, K.M., Palaeomagnetism of the Serra Geral Formation (1962) Geophysical Journal International, 7, pp. 1-22
- Creer, K.M., Mitchell, J.G., Abou Deeb, J., Palaeomagnetism and radiometric age of the Jurassic Chon‐Aike Formation from Santa Cruz Province, Argentina: implications for the opening of the South Atlantic (1972) Earth Planet. Sci. Letters, 14, pp. 131-138
- De Giusto, J.M., (1956), Informe geológico preliminar, Zona Ea. Baquero, Ea. Roca Blanca, (Prov. Santa Cruz), Unpublished report J. 240, Yacimientos Petroliferos Fiscales; Fisher, R.A., Dispersion on a sphere (1953) Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 217 A, pp. 295-305
- Maxwell, A.E., Von Herzen, R.P., Hsü, K.J., Andrews, J.E., Saito, T., Percival, S.E., Milow, E.D., Boyce, R.E., Deep sea drilling in the South Atlantic (1970) Science, 168, pp. 1047-1059
- Smith, A.G., Hallam, A., The fit of the Southern Continents (1970) Nature, 225. , 139, 000
- Valencio, D.A., (1970), pp. 303-318. , Relative Upper Palaeozoic‐Mesozoic positions of South America and Africa from palaeomagnetic data, Conf. on Solid Earth Problems, International Upper Mantle Project, Buenos Aires, October 1970, 2; Valencio, D.A., (1970), pp. 100-116. , Working document on Palaeomagnetism, Conf. on Solid Earth Problems, International Upper Mantle Project, Buenos Aires, October 1970, 1; Valencio, D.A., (1970), pp. 169-174. , The significance of the palaeomagnetic data from Mesozoic and Cenozoic rocks of South America, Second Gondwana Symposium Proc., South African; Valencio, D.A., Palaeomagnetism of the lower Cretaceous Vulcanites, Cerro Colorado Formation of the Sierra de los Cóndores Group, Province of Córdoba, Argentina (1972) Earth Planet. Sci. Letters, 16, pp. 370-378
- Valencio, D.A., Vilas, J.F., Age of separation of South America and Africa (1969) Nature, 223, pp. 1353-1354
- Valencio, D.A., Vilas, J.F., Palaeomagnetism of some Middle Jurassic lavas from southeast Argentina (1970) Nature, 225, pp. 262-264
- Valencio, D.A., Vilas, J.F., Palaeomagnetism of Late Palaeozoic and early Mesozoic rocks of South America (1972) Earth Planet. Sci. Letters, 15, pp. 75-85
Citas:
---------- APA ----------
(1974) . Palaeomagnetism of Some Igneous Rocks of the Middle Jurassic Chon‐Aike Formation from Estancia La Reconquista, Province of Santa Cruz, Argentina. Geophysical Journal of the Royal Astronomical Society, 39(3), 511-522.http://dx.doi.org/10.1111/j.1365-246X.1974.tb05469.x
---------- CHICAGO ----------
Vilas, J.F.A. "Palaeomagnetism of Some Igneous Rocks of the Middle Jurassic Chon‐Aike Formation from Estancia La Reconquista, Province of Santa Cruz, Argentina" . Geophysical Journal of the Royal Astronomical Society 39, no. 3 (1974) : 511-522.http://dx.doi.org/10.1111/j.1365-246X.1974.tb05469.x
---------- MLA ----------
Vilas, J.F.A. "Palaeomagnetism of Some Igneous Rocks of the Middle Jurassic Chon‐Aike Formation from Estancia La Reconquista, Province of Santa Cruz, Argentina" . Geophysical Journal of the Royal Astronomical Society, vol. 39, no. 3, 1974, pp. 511-522.http://dx.doi.org/10.1111/j.1365-246X.1974.tb05469.x
---------- VANCOUVER ----------
Vilas, J.F.A. Palaeomagnetism of Some Igneous Rocks of the Middle Jurassic Chon‐Aike Formation from Estancia La Reconquista, Province of Santa Cruz, Argentina. Geophys. J. Int. 1974;39(3):511-522.http://dx.doi.org/10.1111/j.1365-246X.1974.tb05469.x
