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Remanence anisotropy effect on the palaeointensity results obtained from various archaeological materials, excluding pottery

Earth, Planets and Space volume 61, pages 711–732 (2009)Cite this article

Abstract

The effect of magnetic anisotropy on the palaeointensity results has been evaluated in different materials, including samples from archaeological structures of various ages, such as baked clay from prehistoric domestic ovens or pottery kilns, burnt soil from ancient fires, and bricks and bricks or tiles used in the kiln’s construction. The remanence anisotropy was estimated by the thermoremanent (TRM) anisotropy tensor and isothermal remanence (IRM) tensor methods. The small anisotropy effect (less than 5%) observed in the palaeointensity results of baked clay from the relatively thin prehistoric oven’s floors estimated previously through IRM anisotropy was confirmed by TRM anisotropy of this material. The new results demonstrate the possibility of using IRM anisotropy evaluation to correct baked clay palaeointensity data instead of the more difficult to determine TRM anisotropy ellipsoid. This is not always the case for the palaeointensity results from bricks and tiles. The anisotropy correction to palaeointensity results seems negligible for materials other than pottery. It would therefore appear that the palaeointensity determination is more sensitive to the degree of remanence anisotropy P and the angle between the natural remanent magnetization (NRM) vector and the laboratory field direction, than to the angle between the NRM and the maximum axis of the remanence anisotropy ellipsoid (Kmax).

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Authors and Affiliations

  1. Geophysical Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria

    Mary Kovacheva, Neli Jordanova & Vassil Karloukovski

  2. Geosciences-Rennes, UMR 6118 CNRS-University of Rennes 1, France

    Annick Chauvin & Philippe Lanos

  3. IRAMAT, CNRS, UMR 5060, Université de Bordeaux 3, France

    Philippe Lanos

  4. Centre for Environmental Magnetism, Geographical Department of Lancaster University, Lancaster, LA1 4YB, UK

    Vassil Karloukovski

Authors
  1. Mary Kovacheva
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  2. Annick Chauvin
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  3. Neli Jordanova
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  4. Philippe Lanos
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  5. Vassil Karloukovski
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Correspondence to Mary Kovacheva.

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Kovacheva, M., Chauvin, A., Jordanova, N. et al. Remanence anisotropy effect on the palaeointensity results obtained from various archaeological materials, excluding pottery. Earth Planet Sp 61, 711–732 (2009). https://doi.org/10.1186/BF03353179

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  • DOI: https://doi.org/10.1186/BF03353179

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