Navegar

Colección

Datos Estadísticas

Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

Further geological evidence and radiometric studies of South American igneous rocks suggest, (i) a Middle Permian age for geomagnetic poles until now quoted as Permo-Triassic or Lower Triassic, and (ii) a Middle-Upper Triassic age for a geomagnetic pole previously quoted either as Middle or Upper Triassic. The palaeomagnetic and radiometric data from igneous rocks of the Quebrada del Pimiento Formation of Argentina, define a period of normal polarity within the Late Palaeozoic Interval of reversed geomagnetic polarity (Kiaman Magnetic Interval); the possibility of using this short normal period for geological correlation is suggested. The Late Palaeozoic geomagnetic poles now available for South America define the polar path relative to this continent fairly well; it is suggested that this polar path is also valid for Africa, South America and Africa having been joined by their Atlantic margins throughout the Late Palaeozoic and Triassic. The discrepancy between the positions of Permian geomagnetic poles of South America and Australia is pointed out. It could represent different polar shifts relative to South America and Australia and could imply that the fragmentation of Gondwana started in Early Permian times with the formation of two super-continents: South America-Africa and Australia-Antarctica-India. © 1972.

Registro:

Documento: Artículo
Título:Palaeomagnetism of Late Palaeozoic and Early Mesozoic rocks of South America
Autor:Valencio, D.A.; Vilas, J.F.
Filiación:Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Nuñez, Pabellón II, Buenos Aires, Argentina
Año:1972
Volumen:15
Número:1
Página de inicio:75
Página de fin:85
DOI: http://dx.doi.org/10.1016/0012-821X(72)90032-5
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_v15_n1_p75_Valencio

Referencias:

  • Valencio, El paleomagnetismo de una formación magmática del suroeste de la Provincia de Mendoza (1969) Cuartas Jornadas Geológicas Argentinas, 2, p. 375
  • Vilas, Resultados preliminares des estudio paleomagnético de algunas formaciones triásicas del sudoeste Mendoza (1969) Cuartas Jornadas Geológicas Argentinas, 3. , in press
  • Valencio, Vilas, Age of the separation of South America and Africa (1969) Nature, 223, p. 1353
  • Creer, Embleton, Valencio, Triassic and Permo-Triassic palaeomagnetic data for South America (1970) Earth Planet. Sci. Letters, 8, p. 173
  • Vilas, Valencio, The recurrent Mesozoic drift of South America and Africa (1970) Earth Planet. Sci. Letters, 7, p. 441
  • Valencio, El palaeomagnetismo de algunas magmatitas del Triásico Superior, Grupo Cacheuta, Provincia de Mendoza (1969) Revista de la Asociación Geológica Argentina, 24, p. 191
  • Valencio, The significance of the palaeomagnetic data from Mesozoic and Cenozoic rocks of South America (1972) Proc. Second Symposium on the Stratigraphy and Palacontology of the Gondwana System, , in press
  • Valencio, Mitchell, Edad Potasio-Argón y paleomagnetismo de rocasígneas de las Formaciones Quebrada del Pimiento y Las Cabras, Provincia de Mendoza (1972) Revista de la Asociación Geológica Argentina, , in press
  • Creer, Mitchell, Valencio, Evidence for a normal geomagnetic field polarity event at 263 ± 5 my bp within the Late Palaeozoic Reversed Interval (1971) Nature, 233, p. 87
  • Embleton, Nuevos estudios paleomagnéticos del Neopaleozoico (Paganzo II) de la República Argentina (1970) Revista de la Asociación Geológica Argentina, 25, p. 103
  • Creer, Embleton, Valencio, Comparison between the Upper Palaeozoic and Mesozoic palaeomagnetic poles from South America, Africa and Australia (1969) Earth Planet. Sci. Letters, 7, p. 288
  • Valencio, Mitchell, Palaeomagnetism an K-Ar ages of Permian lavas from Argentina and the intercontinental correlation of Upper Palaeozoic-Lower Mesozoic formations (1971) 24th International Congress, , Canada, in press
  • González Díaz, Descripción Geológica de la Hoja 27 d (San Rafael) Provincia de Mendoza (1972) Dirección de Minas y Geología, , in press
  • Polanski, Edades eruptivas Suprapaleozoicas asociadas con el diastrofismo Varíscio (1966) Revista de la Asociación Geológica Argentina, 21, p. 1
  • González Díaz, El hallazgo del Infra? Mesotriásico continental en el Sur delárea pedemontana mendocina (1966) Actas Geológica Lilloana, 8, p. 101
  • Bonaparte, New vertebrate evidence for a southern Transatlantic connexion during the Lower or Middle Triassic (1967) Palaeontology, 10, p. 4
  • Harrington, Investigaciones geológicas en las sierras de Villa vicencio y Mal País (Provincia de Mendoza) (1941) Dirección de Minas y Geología, 49. , Boletín
  • Harrington, (1972) Descripción geológica de la Hoja 22c, Ramblon, Provincia de Mendoza, , Instituto Nacional de Geología y Minería, in press
  • Stipanicic, El sistema Triásico en la Argentina (1956) International Geological Congress, XXth Session, p. 73. , Mexico, Section II
  • Rolleri, Criado Roque, Geología de la Provincia de Mendoza (1969) IVas. Jornadas Geológicas Argentinas, p. 1. , Mendoza
  • Harland, Smith, Willcock, The Phanerozoic Time Scale (1964) A Symposium dedicated to Professor Arthur Holmes, , Geological Society of London
  • Creer, Palaeomagnetic data from the Gondwana continents (1965) Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 258, p. 27
  • Creer, Palaeomagnetism and the results of its application to South American rocks (1964) Boletin Paranaense de Geografía, 11-15, p. 93
  • Creer, A palaeomagnetic survey of South American rock formations (1970) Phil. Trans. Roy. Soc. London, 267, p. 457
  • Valencio, Vilas, Palaeomagnetism of some Middle Jurassic lavas from southeast Argentina (1970) Nature, 225, p. 262
  • Creer, Palaeomagnetism of the Serra Geral Formation (1962) Geophysical Journal International, 7, p. 1
  • Valencio, Relative Upper Palaeozoic-Mesozoic positions of South America and Africa from palaeomagnetic data (1970) Conf. on Solid Earth Problems, International Upper Mantle Project, , Buenos Aires, in press
  • Opdyke, The paleomagnetism of the Permian redbeds of South west Tanganyika (1964) Journal of Geophysical Research, 69, p. 2477
  • Bonaparte, New vertebrate evidence for a southern Transatlantic connection during the Lower or Middle Triassic (1967) Paleontology, 10, p. 4
  • McElhinny, Briden, Continental drift during the Palaeozoic (1971) Earth Planet. Sci. Letters, 10, p. 407
  • McElhinny, Opdyke, Paleomagnetism of some Carboniferous glacial varves from Central Africa (1968) Journal of Geophysical Research, 73, p. 689
  • Valencio, Embleton, Vilas, Reconstrucción y evolución del continente Gondwana sobre la base de datos paleomagnéticos y de la propagación de los fondos de los océanos (1971) Revista Asociación Geológica Argentina, 26, p. 5
  • McElhinny, Formation of the Indian Ocean (1970) Nature, 228, p. 977
  • McElhinny, The palaeomagnetism of the Permian of Southeast Australia and its significance regarding the problem of intercontinental correlation (1969) Spec. Publ. Geol. Soc. Aust., 2, p. 61

Citas:

---------- APA ----------
Valencio, D.A. & Vilas, J.F. (1972) . Palaeomagnetism of Late Palaeozoic and Early Mesozoic rocks of South America. Earth and Planetary Science Letters, 15(1), 75-85.
http://dx.doi.org/10.1016/0012-821X(72)90032-5
---------- CHICAGO ----------
Valencio, D.A., Vilas, J.F. "Palaeomagnetism of Late Palaeozoic and Early Mesozoic rocks of South America" . Earth and Planetary Science Letters 15, no. 1 (1972) : 75-85.
http://dx.doi.org/10.1016/0012-821X(72)90032-5
---------- MLA ----------
Valencio, D.A., Vilas, J.F. "Palaeomagnetism of Late Palaeozoic and Early Mesozoic rocks of South America" . Earth and Planetary Science Letters, vol. 15, no. 1, 1972, pp. 75-85.
http://dx.doi.org/10.1016/0012-821X(72)90032-5
---------- VANCOUVER ----------
Valencio, D.A., Vilas, J.F. Palaeomagnetism of Late Palaeozoic and Early Mesozoic rocks of South America. Earth Plan. Sci. Lett. 1972;15(1):75-85.
http://dx.doi.org/10.1016/0012-821X(72)90032-5