Determination of Anisotropy of Tills by Means of Azimuthal Resistivity and Conductivity Measurements: Selected Paper – Conference, Copenhagen May 14-16, 1998, on “Mass Transport in Fractured Aquifers and Aquitards”

Anisotropy of glacial tills in Lapland revealed with azimuthal galvanic (Terrameter 300 C) resistivity and inductive (Geonics EM-31) electrical conductivity measurements, which were carried out at four test sites. It was found that the azimuthal electrical conductivity parallelled with the preferred orientation of the till fabric at the top of the soil sequences. The present results indicate that azimuthal resistivity and conductivity are depositional in origon and are attributed to the former ice flow directions. Different coil orientations gave information from different depths and resistivity and conductivity anisotropy varied along with depth.