PHYSICAL-PROPERTIES OF LIMESTONE FROM THE QUARRY OF MERIEL

In order to model the electrical phenomena observed in the laboratory quarry (at Meriel, France) we performed systematic measurements of the physical properties of the quarry rocks. We showed that the permeabil ity is heterogeneous at decimetre scale and its average value is 230 m D. The formation factor is 3.5, showing that the porous network is wel l connected. The electrokinetic coupling coefficient is -0.50 V/MPa fo r a fluid resistivity of 200 Ohm m and the effects of surface conducti vity are negligible. Elastic wave velocities are connected to porosity by a linear relationship.