Diese Seite ist aus Gründen der Barrierefreiheit optimiert für aktuelle Browser. Sollten Sie einen älteren Browser verwenden, kann es zu Einschränkungen der Darstellung und Benutzbarkeit der Website kommen!
Geophysics Homepage
Search:
Log in
print

Variations of magnetic properties in thin lava flow profiles: Implications for the recording of the Laschamp Excursion

Verard, C., R. Leonhardt, M. Winklhofer, and K. Fabian (2012), Variations of magnetic properties in thin lava flow profiles: Implications for the recording of the Laschamp Excursion, Phys. Earth Planet. Inter., 200-201, 10-27, doi:10.1016/j.pepi.2012.03.012.

Abstract
Two blocks have been cut in two lava flows from the Skalamaelifell Hill (Iceland) known to have recorded the Laschamp magnetic excursion (40.4 ± 2.0 ka). Detailed sampling and analyses have revealed multiple magnetic components. The high temperature/coercivity component corresponds to the primary magnetisation, with corresponding pole position close to the equator in the Pacific Ocean (φ = 251.90°/λ = −06.49°; dp = 0.74°/dm = 2.12°) and palaeo-intensity determinations below 5 μT. The different VGPs, however, vary in relation with the position of samples in the profiles. It could not be firmly established whether this distribution is associated with a change in the Earth magnetic field during lava cooling. In any case, variations are related with zones in the profiles marked, in particular, by the presence of vesicles. Moreover, the other components are interpreted to be linked with alteration inside the rocks, caused by interactions between vesicles content and the surrounding matrix. Secondary component, however, is interpreted as recording an excursional magnetic field, and should be of greater consideration in studies of Earth magnetic field excursions or reversals.
Further information
BibTeX
@article{id1792,
  author = {C. Verard and R. Leonhardt and M. Winklhofer and K. Fabian},
  journal = {Phys. Earth Planet. Inter.},
  pages = {10-27},
  title = {{Variations of magnetic properties in thin lava flow profiles: Implications for the recording of the Laschamp Excursion}},
  volume = {200-201},
  year = {2012},
  url = {http://www.sciencedirect.com/science/article/pii/S0031920112000581},
  doi = {10.1016/j.pepi.2012.03.012},
}
EndNote
%0 Journal Article
%A Verard, C.
%A Leonhardt, R.
%A Winklhofer, M.
%A Fabian, K.
%D 2012
%V 200-201
%J Phys. Earth Planet. Inter.
%P 10-27
%T Variations of magnetic properties in thin lava flow profiles: Implications for the recording of the Laschamp Excursion
%U http://www.sciencedirect.com/science/article/pii/S0031920112000581
ImprintPrivacy PolicyContact
Printed 17. Aug 2019 22:38