Data from: Complex conductivity of graphitic schists and sandstones ...

• Main Authors: Revil, Andre, Abdulsamad, Feras, Ghorbani, Ahmad, Toy, Virginia, Kirilova, Martina, Coperey, Antoine, Duvillard, Pierre-Allain, Menard, Gilles, Ravanel, Ludovic
• Format: Dataset
• Language: English
• Published: Dryad 2020
• Subjects: Permafrost; induced polarization; schists; Graphite; permafrost
• Online Access: https://dx.doi.org/10.5061/dryad.pt2624c; https://datadryad.org/stash/dataset/doi:10.5061/dryad.pt2624c

Spectral Induced Polarization spectra were carried out on 3 graphitic schists and 2 graphitic sandstones. The microstructural arrangement of graphite of two graphitic schists was studied with thin sections using transmitted and reflected light optical and electron microscopic methods. Chemical maps of selected areas confirm the presence of carbon. The complex conductivity spectra were measured in the frequency range 10 mHz to 45 kHz and in the temperature range +20°C down to -15°C. The measured spectra are fitted with a double Cole Cole complex conductivity model with one component associated with the polarization of graphite and the second component associated with the Maxwell Wagner polarization. The Cole Cole exponent and the chargeability are observed to be almost independent of temperature including in freezing conditions. The conductivity and relaxation time are dependent on the temperature in a predictable way. As long as the temperature decreases, the electrical conductivity decreases and the ... : Revil archiveSpectral induced polarization data of rocks and porous media with graphite ...