A physical model of the low-frequency electrical polarization of clay rocks - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Journal of Geophysical Research : Solid Earth Année : 2008

A physical model of the low-frequency electrical polarization of clay rocks

Résumé

Low-frequency (0.18 Hz to 1.5 kHz) effective dielectric spectra have been measured on a set of near-saturated samples of argillite. The measured spectra of the real part of the complex apparent permittivity did not show significant correlation with cation exchange capacity (CEC) per unit mass of rock values. They satisfied a power law relationship with the frequency, at least for samples with CEC values lower than 10 cmol/kg. The Maxwell-Wagner-Hanai-Bruggeman formulation used for a two-phase mixture has been modified to account for mutual polarization between the pockets of water located in the micropores and those located in the macropores. The results of the modeling calculations illustrate (1) the ability of this new formulation to reproduce the power law relationships of the measured spectra of the real and imaginary components of the complex permittivity and (2) the strong impact of the pore electrical conductivity.
Fichier principal
Vignette du fichier
2007JB005539.pdf (411.19 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

insu-00333825 , version 1 (26-05-2020)

Identifiants

Citer

Philippe Cosenza, Ahmad Ghorbani, A. Revil, M. Zamora, M. Schmutz, et al.. A physical model of the low-frequency electrical polarization of clay rocks. Journal of Geophysical Research : Solid Earth, 2008, 113 (B8), pp.B08204. ⟨10.1029/2007JB005539⟩. ⟨insu-00333825⟩
236 Consultations
64 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More