Temperature-frequency dependence of the dielectric parameters in some rocks

The experimental study of the temperature-frequency dependence of permittiv ity epsilon and dielectric loss tangent tan delta in igneous rocks of a com plex dike in southern Daghestan is carried out at frequencies of 5 x 10(4)- 5 x 10(6) Hz and at temperatures of 20-900 degreesC. It is experimentally s hown that epsilon increases exponentially with temperature above 400 degree sC, and relaxation maximums are typically present in the curves tan delta = f(T). Based on the results obtained, the activation energy of the relaxati on process is calculated. The temperature dependence of e is found to be se nsitive to the FeO concentration in granite-porphyry and diabase samples.