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Within the domain of mining problems linked to salt exploitation and abandoned cavities, BRGM has carried out a geophysical study for GEODERIS in the Art-sur-Meurthe brine field which belongs to NOVACARB company. The objective is to test the potential of 2D electricalimaging so as to focus on salt brine filled cavities. The LR45 cavity, having a circular shape with 90 m diameter and a 7 m thickness, is is situated at a depth of 115 m. Preliminary trial runs have given validity to the concept. Resistivity measurements have shed light on a low resistivity structure, of which the characteristics coincide with the established geometry of the cavity. IP measurements detected polarising levels whose origin remains to be determined.

Détection d’une cavité remplie de saumure par imagerie électrique