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A palaeomagnetic and rockmagnetic study of sediment cores from the Zaire submarine fan
van Vreumingen, M.J. (1984). A palaeomagnetic and rockmagnetic study of sediment cores from the Zaire submarine fan. Neth. J. Sea Res. 17(2-4): 342-363
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406, more
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    Marine/Coastal
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  • van Vreumingen, M.J.
Abstract
    The characteristic directions of the Natural Remanent Magnetization (NRM) and some rockmagnetic parameters have been determined as a function of stratigraphic position in 10 cores from the Zaire submarine fan. Most of the sediments have a weak and partly unstable NRM. The top 50 to 150cm of many cores show a higher NRM intensity. The prevailing low NRM intensities are likely to be a consequence of pyritisation of a major part of the magnetic mineral fraction. Low negative values for the mean characteristic inclination are in accordance with the near equatorial sediments of not more than a few hundred thousand years. A correlation of relatively high mean values for the remanent hysteresis parameters H'cr and IRM>200 with cold climatic periods suggests that the magnetic relict which has escaped pyritisation may still reflect original variations in magnetomineralogy.
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