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    Origin of magnetic fabric in bricks: its implications in archaeomagnetism

    Authors
    Hus, J.
    Ech-Chakrouni, S.
    Jordanova, D.
    Discipline
    Earth and related Environmental sciences
    Subject
    Archaeomagnetism
    Anisotropy of magnetic susceptibility
    Brick
    Brick kiln
    Magnetic anisotropy
    Mediaeval
    Audience
    General Public
    Scientific
    Date
    2002
    Publisher
    IRM
    KMI
    RMI
    Metadata
    Show full item record
    Description
    Comparison with the magnetic anisotropy of unbaked (onldy dried) and baked loam bricks, hand moulded in a rectangular frame, reveals that the same moulding technique had been applied to produce the bricks of a Medieval brick kiln that was archaeomagnetically dated at 1650 AD [Geoarchaeology (to be published)]. Anisotropy of magnetic susceptibility (AMS) measurements show that the unbaked and baked bricks have a shape-related magnetic fabric, induced during the moulding process, with average Kmax occurring in the greatest faces along the direction of the longest edges and Kmin perpendicular to the greatest faces of the bricks. The anisotropy of thermoremanence (ATRM) is high, indicating that the remanence directions of bricks may accuse large deviations from the geomagnetic field direction responsible for it. However, anisotropy seems unldikely to be the cause for the apparent discrepancy between the archaeomagnetical and archaeological date of the brick kiln, the latter presumably about half a century older. Besides AMS, also the anisotropy of anhysteretic remanence was examined as a possible substitute for ATRM and to obtain information on the magnetic state of the minerals contributing to the remanence anisotropy.
    Citation
    Hus, J.; Ech-Chakrouni, S.; Jordanova, D. (2002). Origin of magnetic fabric in bricks: its implications in archaeomagnetism. , Issue 0, IRM,
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/8608
    Type
    Article
    Peer-Review
    Not pertinent
    Language
    eng
    Links
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