Absolute palaeoreconstructions of continents based on palaeomagnetic poles and virtual geomagnetic poles?

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Transitional Jurassic and Early Cretaceous Virtual Geomagnetic Poles (VGPs) repositioned according to absolute palaeoreconstructions, define two paths similar to those for reversals ofthe last 12 Myr. These paths roughly coincide with the regions ofthe present core mantle boundary (CMB) that lie bel...

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Detalles Bibliográficos
Autores principales: Vizan, Haroldo, Vasquez, Carlos Alberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 1997
Materias:
Geofísica
Virtual Geomagnetic Poles
Polos geomagnéticos
topografía térmica
topographic temperature
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/134228
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-134228
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geofísica
Virtual Geomagnetic Poles
Polos geomagnéticos
topografía térmica
topographic temperature
spellingShingle Geofísica
Virtual Geomagnetic Poles
Polos geomagnéticos
topografía térmica
topographic temperature
Vizan, Haroldo
Vasquez, Carlos Alberto
Absolute palaeoreconstructions of continents based on palaeomagnetic poles and virtual geomagnetic poles?
topic_facet Geofísica
Virtual Geomagnetic Poles
Polos geomagnéticos
topografía térmica
topographic temperature
description Transitional Jurassic and Early Cretaceous Virtual Geomagnetic Poles (VGPs) repositioned according to absolute palaeoreconstructions, define two paths similar to those for reversals ofthe last 12 Myr. These paths roughly coincide with the regions ofthe present core mantle boundary (CMB) that lie below regions ofthe lower-mantle with fast seismic wave velocities. A statistical test applied to the population of Jurassic-Early Cretaceous transitional VGPs identifies two antipodal bands (105/137° E-285/317’ E). Mantle convection and geoid models suggest that the present topographic temperature pattern over the CMB has persisted since the Late Paleozoic. Hotspot tracks are alternative tools to make absolute reconstructions, but they are not applicable to Late Paleozoic times due to lack ofhotspot framework for those times. Absolute reconstructions of South America for the Late Permian based on a mean palaeomagnetic pole and on the position of the bands defined by transitional and oblique VGPs are presented. These reconstructions are compared with an alternative obtained by a different method.
format Articulo
Articulo
author Vizan, Haroldo
Vasquez, Carlos Alberto
author_facet Vizan, Haroldo
Vasquez, Carlos Alberto
author_sort Vizan, Haroldo
title Absolute palaeoreconstructions of continents based on palaeomagnetic poles and virtual geomagnetic poles?
title_short Absolute palaeoreconstructions of continents based on palaeomagnetic poles and virtual geomagnetic poles?
title_full Absolute palaeoreconstructions of continents based on palaeomagnetic poles and virtual geomagnetic poles?
title_fullStr Absolute palaeoreconstructions of continents based on palaeomagnetic poles and virtual geomagnetic poles?
title_full_unstemmed Absolute palaeoreconstructions of continents based on palaeomagnetic poles and virtual geomagnetic poles?
title_sort absolute palaeoreconstructions of continents based on palaeomagnetic poles and virtual geomagnetic poles?
publishDate 1997
url http://sedici.unlp.edu.ar/handle/10915/134228
work_keys_str_mv AT vizanharoldo absolutepalaeoreconstructionsofcontinentsbasedonpalaeomagneticpolesandvirtualgeomagneticpoles
AT vasquezcarlosalberto absolutepalaeoreconstructionsofcontinentsbasedonpalaeomagneticpolesandvirtualgeomagneticpoles
bdutipo_str Repositorios
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