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:

The Late Permian segment of the South American apparent polar wander path (APWP) is poorly defined and further paleomagnetic efforts on suitable rocks of such age from stable areas of South America are needed. A study was carried out on the Late Permian Independencia Group, which is discontinuously exposed along Eastern Paraguay and consists of several hundred meters of flat lying continental white, pink and reddish sandstones and siltstones, deposited on the western margin of the Paraná basin. Thirteen sites (83 samples) were collected on the top unit of the Group (the latest Permian Tacuary Fm) from outcrops distributed over 1000 square kms. Detailed AF and thermal demagnetization permitted the isolation of within-site consistent characteristic remanence in eleven sites, being generally hematite the main carrier of the remanence. Excluding one outlier, a paleomagnetic pole was computed by averaging 10 virtual geomagnetic poles of mixed polarities (6 reversed, 4 normal), yielding a position at: 80.7°S, 7.0°E, A95: 6.6°. The new pole may be considered key for a better definition of the South American APWP by filling a gap between a relatively reliable Early Permian and a poorly defined Early-Middle Triassic groups of poles. Copyright © The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences; TERRAPUB.

Registro:

Documento: Artículo
Título:A new late Permian paleomagnetic pole for stable South America: The independencia group, eastern Paraguay
Autor:Rapalini, A.E.; Fazzito, S.; Orué, D.
Filiación:INGEODAV, Depto. Cs. Geológicas, Univ. Buenos Aires, Pabellón 2, C1428EHA Buenos Aires, Argentina
Universidad Nacional de Asunción, Asuncion, Paraguay
Palabras clave:Apparent polar wander path; Gondwana; Paleogeography; Paleomagnetism; South America; apparent polar wander path; demagnetization; deposition; paleomagnetism; Permian; sandstone; siltstone; Triassic; Paraguay; Parana Basin; South America
Año:2006
Volumen:58
Número:10
Página de inicio:1247
Página de fin:1253
DOI: http://dx.doi.org/10.1186/BF03352620
Título revista:Earth, Planets and Space
Título revista abreviado:Earth Planets Space
ISSN:13438832
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13438832_v58_n10_p1247_Rapalini

Referencias:

  • Beck Jr., M.E., Analysis of Late Jurassic - Recent paleomagnetic data from active plate margins of South America (1988) Journal of South American Earth Sciences, 1, pp. 39-52
  • Bullard, E.C., Everett, J.E., Smith, A.G., The fit of continents around the Atlantic (1965) Phil. Trans. Roy. Soc., 258, pp. 41-51
  • Conti, C., Rapalini, A.E., Paleomagnetismo de la Formacion Choique Mahuida, aflorante en la sierra homónima, provincia de La Pampa, República Argentina (1990) 12th Congreso Geoógico Argentino, San Juan, Argentina, 2, pp. 235-238
  • Creer, K.M., Embleton, B.J.J., Valencio, D.A., Triassic and Permo-Triassic palaeomagnetic data for South America (1970) Earth and Planet. Sci. Lett., 8, pp. 173-178
  • Embleton, B.J.J., Paleomagnetic results for the Permian of South America and a comparison with the African and Australian data (1970) Geophys. J. R. Astr. Soc., 21, pp. 105-118
  • Ernesto, M., New Early Triassic Paleomagnetic Pole for South America from the Alto Paraguay Alkaline Province (2005) 2005 Joint Assembly AGU, , New Orleans, USA, Abstracts: GP-41A-08
  • Eyles, N., Franca, A., Gonzalez Bonorino, G., Eyles, C.H., López Paulsen, O., Hydrocarbon-bearing late Paleozoic glaciated basins of southern and central South America (1995) American Association of Petroleum Geologists Memoir, 62, pp. 165-183
  • Geuna, S., Escosteguy, L.D., Paleomagnetism of the Upper Carboniferous - Lower Permian transition from Paganzo basin, Argentina (2004) Geophys. J. Int., 157, pp. 1071-1089
  • Gradstein, F.M., Ogg, J.G., Smith, A.G., (2004) A Geologic Time Scale 2004, p. 589. , Cambridge University Press, Cambridge, UK
  • Hargraves, R.B., Problems in palaeomagnetic synthesis illustrated by results from Permo-Triassic dolerites in Guyana (1978) Phys. Earth Planet. Inter., 16, pp. 277-284
  • Harrington, H.J., Geología del Paraguay Oriental (1950) Universidad De Buenos Aires, Fac. Cs. Exactas Y Naturales, Contribuciones Científicas, Serie E, Geología, 1, pp. 1-88
  • Irving, E., Drift of the major continental blocks since the Devonian (1977) Nature, 270, pp. 304-309
  • Kirschvink, J.L., The least-squares line and plane and the analysis of palaeomagnetic data (1980) Geophys. J. R. Astr. Soc., 62, pp. 699-718
  • Lopez Gamundi, O., Espejo, I., Conaghan, P., Powell, C.Mc.A., Southern South America (1994) Geological Society of America Memoir, 184, pp. 281-329. , in Permian-Triassic Pangean Basins and Fold Belts along the Panthalassan margin of western Gondwanaland, edited by J. Veevers and C. Mc. A. Powell
  • Lottes, A.L., Rowley, D.B., Reconstruction of the Laurasian and Gondwanan segments of Permian Pangaea (1990) Geological Society Memoir, 12, pp. 383-395
  • McElhinny, M.W., McFadden, P.L., (2000) Paleomagnetism. Continents and Oceans, 73, p. 386. , Academic Press Internat. Geophys. Series
  • McFadden, P.L., McElhinny, M.W., Classification of the reversal test in palaomagnetism (1990) Geophys. J. Int., 103, pp. 725-729
  • Morel, P., Irving, E., Paleomagnetism and the evolution of Pangea (1981) J. Geophys. Res., 86, pp. 1858-1872
  • Muttoni, G., Kent, D.V., Channell, J.E.T., Evolution of Pangea: Paleomagnetic constraints from the Southern Alps, Italy (1996) Earth. Planet. Sci. Lett., 140, pp. 97-112
  • Muttoni, G., Kent, D.V., Garzanti, E., Brack, P., Abrahamsen, N., Gaetani, M., Early Permian Pangea 'B' to Late Permian Pangea 'A' (2003) Earth. Planet. Sci. Lett., 215, pp. 379-394
  • Orué, D., (1996) Sintese Da Geologia Do Paraguai Oriental, Com Enfase Para O Magmatismo Alcalino Associado, p. 163. , Instituto de Geociencias, Universidad de Sao Paulo, Master Thesis
  • Pascholati, E.M., Pacca, I.G., Estudo paleomagnético de secçoes do Sub-Grupo Itararé (1976) 29th Cong. Brasil. Geol., 2, pp. 275-281. , Belo Horizonte
  • Sinito, A.M., Valencio, D.A., Vilas, J.F., Palaeomagnetism of a sequence of Upper Palaeozoic - Lower Mesozoic red beds from Argentina (1979) Geophys. J. R. Astr. Soc., 58, pp. 237-247
  • Tan, X., Kodama, K.P., Magnetic anisotropy and paleomagnetic inclination shallowing in red beds: Evidence from the Mississipian Mauch Chunk Formation, Pennsylvania (2002) J. Geophys. Res., 107 (B11), p. 2311. , doi:10.129/2001JB001636, EPM 9-1/9-17
  • Tan, X., Kodama, K.P., Fang, D., Laboratory depositional nad compaction-caused inclination errors carried by haematite and their implications in identifying inclination error of natural remanence in red beds (2002) Geophys. J. Int., 151, pp. 475-486
  • Tomezzoli, R.N., Further paleomagnetic results from the Sierras Australes fold and thrust belt, Argentina (2001) Geophys. J. Int., 147, pp. 356-366
  • Tomezzoli, R.N., Vilas, J.F., Palaeomagnetic constraints on the age of deformation of the Sierras Australis thrust and fold belt, Argentina (1999) Geophys. J. Int., 138, pp. 857-870
  • Torcq, F., Besse, J., Vaslet, D., Marcoux, J., Ricou, L., Halawani, M., Basahel, M., Paleomagnetic results from Saudi Arabia and the Permo-Triassic Pangea configuration (1997) Earth. Planet. Sci. Lett., 148, pp. 553-567
  • Valencio, D.A., Vilas, J.F., Mendia, J.E., Paleomagnetism of a sequence of red beds of the middle and the upper sections of Paganzo Group (Argentina) and the correlation of upper Palaeozoic - Lower Mesozoic rocks (1977) Geophys. J. R. Astr. Soc., 51, pp. 59-74
  • Van der Voo, R., The reliability of paleomagnetic data (1990) Tectonophysics, 184, pp. 1-9
  • Van der Voo, R., (1993) Paleomagnetism of the Atlantic, Tethys and Iapetus Oceans, p. 411. , Cambridge University Press
  • Van der Voo, R., Torsvik, T., Evidence for late Paleozoic and Mesozoic non-dipole fields provides an explanation for the Pangea reconstruction problems (2001) Earth. Planet. Sci. Lett., 187, pp. 71-81
  • Vilas, J.F., Paleomagnetism of South American rocks and the dynamic processes related with the fragmentation of Western Gondwana (1981) Paleoreconstruction of the Continents, 2, pp. 106-114. , in edited by M. W. McElhinny and D. A. Valencio, Am. Geophys. Union, Geol. Soc. Am., Geodynamics Series
  • Vizán, H., Ixer, R., Turner, P., Cortés, J.M., Cladera, G., Paleomagnetism of Upper Triassic rocks in the Los Colorados Hill section, Mendoza province, Argentina (2004) Journal of South American Earth Sciences, 18, pp. 41-59

Citas:

---------- APA ----------
Rapalini, A.E., Fazzito, S. & Orué, D. (2006) . A new late Permian paleomagnetic pole for stable South America: The independencia group, eastern Paraguay. Earth, Planets and Space, 58(10), 1247-1253.
http://dx.doi.org/10.1186/BF03352620
---------- CHICAGO ----------
Rapalini, A.E., Fazzito, S., Orué, D. "A new late Permian paleomagnetic pole for stable South America: The independencia group, eastern Paraguay" . Earth, Planets and Space 58, no. 10 (2006) : 1247-1253.
http://dx.doi.org/10.1186/BF03352620
---------- MLA ----------
Rapalini, A.E., Fazzito, S., Orué, D. "A new late Permian paleomagnetic pole for stable South America: The independencia group, eastern Paraguay" . Earth, Planets and Space, vol. 58, no. 10, 2006, pp. 1247-1253.
http://dx.doi.org/10.1186/BF03352620
---------- VANCOUVER ----------
Rapalini, A.E., Fazzito, S., Orué, D. A new late Permian paleomagnetic pole for stable South America: The independencia group, eastern Paraguay. Earth Planets Space. 2006;58(10):1247-1253.
http://dx.doi.org/10.1186/BF03352620