Abstract
This study presents the potential of multi-frequency electromagnetic induction (EMI) in archaeology. EMI is currently less employed for archaeological prospection with respect to other geophysical techniques. It is capable of identifying shallow subsurface relics by simultaneously measuring the apparent electrical conductivity (ECa) and apparent magnetic susceptibility (MSa). Moreover, frequency sounding is able to quantify the depths and vertical shapes of buried structures. In this study, EMI surveys with five frequencies were performed at two heritage sites with different geological conditions: Han Hangu Pass characterized by cinnamon soil and Xishan Yang by sandy loams. In the first site, high ECa values were observed with variations in depth correlated to archaeological remains. Moreover, electromagnetic anomalies related to an ancient road and five kiln caves were identified. In the second site, an ancient tomb, indicating extremely low ECa and high MSa, was discovered. Its electromagnetic properties are attributed to the cavity and ferroferric oxides.
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Acknowledgements
This research was jointly supported by funding from the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA19030502) and Hundred Talents Program of the Chinese Academy of Sciences (CAS) (Grant No. Y5YR0300QM).
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Tang, P., Chen, F., Jiang, A. et al. Multi-frequency Electromagnetic Induction Survey for Archaeological Prospection: Approach and Results in Han Hangu Pass and Xishan Yang in China. Surv Geophys 39, 1285–1302 (2018). https://doi.org/10.1007/s10712-018-9471-5
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DOI: https://doi.org/10.1007/s10712-018-9471-5