Paleomagnetism of the Patagonian Plateau basalts, southern Chile and Argentina

R. F. Butler, F. Herve, F. Munizaga, M. E. Beck, R. F. Burmester, E. S. Oviedo

Resultado de la investigación: Article

36 Citas (Scopus)

Resumen

A total of 505 paleomagnetic samples were collected from 65 sites (volcanic flows) of the Patagonian Plateau basalts at four locations in southern Chile and Argentina. K/Ar analyses indicate that 38 flows from the two locations form a Late Cretaceous group (64-79 Ma), while the remaining 27 flows are Eocene in age (42-56 Ma). Progressive demagnetization indicates that a characteristic remanent magnetization (ChRM) has been successfully isolated from 59 flows. Rock-magnetic properties and analysis of ChRM directions within and between sites allow the secure inference that the ChRM is a thermoremanent magnetization acquired during original cooling. Contrary to previous indications, the South American apparent polar wander path does not reach the present rotation axis until after Late Cretaceous time. -from Authors

Idioma originalEnglish
Páginas (desde-hasta)6023-6034
Número de páginas12
PublicaciónJournal of Geophysical Research
Volumen96
N.ºB4
EstadoPublished - 1991

Huella dactilar

paleomagnetism
Argentina
basalt
Chile
plateaus
Magnetization
remanent magnetization
plateau
magnetization
magnetic properties
thermoremanent magnetization
Cretaceous
apparent polar wander path
Demagnetization
demagnetization
magnetic property
inference
volcanology
Magnetic properties
indication

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)
  • Forestry
  • Geochemistry and Petrology
  • Water Science and Technology
  • Geophysics
  • Oceanography
  • Soil Science
  • Palaeontology
  • Space and Planetary Science
  • Ecology
  • Earth and Planetary Sciences (miscellaneous)
  • Atmospheric Science
  • Aquatic Science
  • Earth-Surface Processes

Citar esto

Butler, R. F., Herve, F., Munizaga, F., Beck, M. E., Burmester, R. F., & Oviedo, E. S. (1991). Paleomagnetism of the Patagonian Plateau basalts, southern Chile and Argentina. Journal of Geophysical Research, 96(B4), 6023-6034.
Butler, R. F. ; Herve, F. ; Munizaga, F. ; Beck, M. E. ; Burmester, R. F. ; Oviedo, E. S. / Paleomagnetism of the Patagonian Plateau basalts, southern Chile and Argentina. En: Journal of Geophysical Research. 1991 ; Vol. 96, N.º B4. pp. 6023-6034.
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Butler, RF, Herve, F, Munizaga, F, Beck, ME, Burmester, RF & Oviedo, ES 1991, 'Paleomagnetism of the Patagonian Plateau basalts, southern Chile and Argentina', Journal of Geophysical Research, vol. 96, n.º B4, pp. 6023-6034.

Paleomagnetism of the Patagonian Plateau basalts, southern Chile and Argentina. / Butler, R. F.; Herve, F.; Munizaga, F.; Beck, M. E.; Burmester, R. F.; Oviedo, E. S.

En: Journal of Geophysical Research, Vol. 96, N.º B4, 1991, p. 6023-6034.

Resultado de la investigación: Article

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AU - Oviedo, E. S.

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AB - A total of 505 paleomagnetic samples were collected from 65 sites (volcanic flows) of the Patagonian Plateau basalts at four locations in southern Chile and Argentina. K/Ar analyses indicate that 38 flows from the two locations form a Late Cretaceous group (64-79 Ma), while the remaining 27 flows are Eocene in age (42-56 Ma). Progressive demagnetization indicates that a characteristic remanent magnetization (ChRM) has been successfully isolated from 59 flows. Rock-magnetic properties and analysis of ChRM directions within and between sites allow the secure inference that the ChRM is a thermoremanent magnetization acquired during original cooling. Contrary to previous indications, the South American apparent polar wander path does not reach the present rotation axis until after Late Cretaceous time. -from Authors

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Butler RF, Herve F, Munizaga F, Beck ME, Burmester RF, Oviedo ES. Paleomagnetism of the Patagonian Plateau basalts, southern Chile and Argentina. Journal of Geophysical Research. 1991;96(B4):6023-6034.