Electrical resistance measurements, thin-section, chemical, thermal differential, and thermal gravimetrical analyses were applied to dunites of different serpentinization degrees (from 0 to 100%, at 1–4% interval) from the Nizhnii Tagil dunite-clinopyroxenite massif in the Ural PGE-bearing belt (Solovieva Gora). The obtained functions show temperature-dependent behavior of electrical resistance in the range of 20 to 800 °C and a dependence of the activation energy of ions on the degree of early serpentinization of dunites. The serpentinization-dependent activation energy shows no resistance dependence at room temperature but is proportional to resistance temperature coefficient lg R0 (R0 is equal to resistance at 1 /T → 0, T is temperature in K) in the temperature ranges of impurity-bearing (150–300 °C) and pure (350–600 °C) serpentinites.

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