The site of zinc and lead metallurgy, and sulphuric acid making of Mortagne-du-Nord (France) is a waste landfill where contamination is the main preoccupation. The physical property sensitive to mineralization is electrical resistivity, because of the water content and quality dependance. Geophysical techniques taking into account this property, such as slingram electromagnetic mapping and electrical 2D imaging have been carried out. Surveys at different depths and over a wide area allow to locate mineralized water areas, to identify the water leakage toward river drain, and to locate the clayey alluvial deposits.

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