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De nouvelles perspectives pour les applications des méthodes électromagnétiques basse fréquence en archéologie

Abstract : The low-frequency electromagnetic method (or EMI for ElectroMagnetic Induction), at the crossroads of the magnetic, electrical and GPR methods, offers many possibilities of development but is also limited by important technical constraints. In spite of instrumental developments initiated during the sixties, their use has long been limited in archaeology to the mapping of apparent electrical conductivity and/or magnetic susceptibility over restricted areas or with wide mesh sampling strategies. Since the end of the 2000s, due to their application in soil science, EMI methods have been widely diffused. Multi-coils and multi-frequency systems have replaced single-frequency and single-receiver devices, then opening up new perspectives in terms of 3D spatial characterization of buried features but also in terms of soil properties analysis. The development of towed systems allowed application to landscape archaeology. This technical advance, which has been expressed in terms of amount of measurement, has prevailed over in-depth theoretical work nowadays illustrated by data inversion and analyses of sensitivity to the different geophysical properties. These two specific points, however, open up the soundness perspectives to future applications. We will discuss the instrumental limitations to which these applications face and which are often neglected by practitioners. We will also present the results of 1D and 3D modelling.
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Submitted on : Wednesday, July 8, 2020 - 3:40:48 PM
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François-Xavier Simon, Julien Guillemoteau, Guillaume Hulin, Joachim Rimpot, Thiesson Julien, et al.. De nouvelles perspectives pour les applications des méthodes électromagnétiques basse fréquence en archéologie. Archimède : archéologie et histoire ancienne, UMR7044 - Archimède, 2020, 7, pp.272-282. ⟨10.47245/archimede.0007.act.14⟩. ⟨halshs-02893837⟩

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