A Balaton üledékeinek paleomágneses mérése

Translated title of the contribution: Palaeomagnetism of the sediments of Lake Balaton

Research output: Contribution to journalArticle

Abstract

We tested the remanence of two short sediment cores of Holocene age from Lake Balaton for the secular variation of the geomagnetic field. IRM runs and S-ratio values point to a ferrimagnetic phase (magnetite, maghemite) as the dominant magnetic mineral present in the sediment. On the Wohlfarth-Cisowski test the behaviour is interacting single domain but there is an abundance of superparamagnetic particles as well as shown by the high degree of viscosity on AF-demagnetisation. Combined with linearity analysis the latter was applied to separate and identify those remanence components which were thought to have been imprinted by the geomagnetic field. After disposing of the severly outlying remanence directions, the mean direction in both cores agrees well with the local direction of the axial dipole field but the individual directions do not seem to follow any regular course expected for the secular variation.

Original languageHungarian
Pages (from-to)49-55
Number of pages7
JournalMagyar Geofizika
Volume48
Issue number2
Publication statusPublished - Dec 1 2007

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ASJC Scopus subject areas

  • Geophysics
  • Geology

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