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Study of Industrial Disturbances Affecting Magnetic Prospecting Data in Archaeological SitesNormal access

Author: S.E. Itkis
Event name: Near Surface Geoscience 2013 - 19th EAGE European Meeting of Environmental and Engineering Geophysics
Session: Archeological Prospection
Publication date: 09 September 2013
DOI: 10.3997/2214-4609.20131358
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.33Mb )
Price: € 20

Summary:
The study of industrial disturbances was focused on “static” sources made of iron and reinforced concrete (e.g. water pipes, stakes), and “active” or electromagnetic-field producing elements (e.g. electrical power lines, generators and geophysical equipment). The measurements and forward modeling provided the patterns and main parameters (amplitudes, gradient and blind-zone sizes) for magnetic anomalies of static disturbances. Forward modeling was also applied to an analysis of the demagnetization effect of highly magnetic objects and the  threshold, the latter being the rate at which the anomaly amplitude increases when that of the  values begins to slow down. The disturbig effect introduced by a non-stable electromagnetic field cannot be eliminated by single-sensor magnetometer measurements but can be suppressed by the use of a gradiometer survey.


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