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Complete and partial self-reversal of natural remanent magnetization of basaltic rocks from Lower Silesia, Poland

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Summary

Experiments of heating-cooling cycles in zero magnetic field were performed in order to study self-reversal of NRM in basaltic rocks from Lower Silesia. Complete self-reversal occurred in one sample containing titanomagnetite withT c of 170°C and a small amount of a phase with higher Curie point. During consecutive heat treatments the phenomenon became less conspicuous. In three samples of higher oxidation level, containing several magnetic phases, only partial self-reversal of NRM occurred. For the most oxidized sample no changes of direction of NRM were observed. We suggest that the investigated phenomenon of self-reversal of NRM is due to a negative magnetic interaction between primary titanomagnetite and products of its oxidation. It seems that complete self-reversal can take place in a restricted state of oxidation.

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Authors and Affiliations

  1. Institute of Geophysics of Polish Academy of Sciences, Pasteura 3, Warszawa

    M. K⇓dziaŀko-Hofmokl & J. Kruczyk

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  1. M. K⇓dziaŀko-Hofmokl
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  2. J. Kruczyk
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K⇓dziaŀko-Hofmokl, M., Kruczyk, J. Complete and partial self-reversal of natural remanent magnetization of basaltic rocks from Lower Silesia, Poland. PAGEOPH 114, 207–213 (1976). https://doi.org/10.1007/BF00878946

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  • DOI: https://doi.org/10.1007/BF00878946

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