Home – Home – Jornals – Russian Geology and Geophysics 2002 number 10

Electrical-resistance measurements, thin-section, chemical, thermal differential, and thermal gravity 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 the temperature-dependent behavior of electrical resistance in the range of 20 to 800^oC and a dependence of conductance activation energy on the degree of early serpentinization of dunites. The serpentinization-dependent activation energy shows no resistance dependence at normal temperature but is proportional to resistance temperature coefficient lgR₀ (R₀ is equal to resistance at 1/R0) in the temperature ranges of impurity-bearing (150-300 ^oC) and pure (350-600 ^oC) serpentinites.