We applied to investigate temperature dependences of electric resistance and loss tangent in the range from 20 to 800°C in magnetite ore. The samples of ore contain 80-90% magnetite, which differ in structure, mineralogy and genetic peculiarities. It is find out that for the every type the linear relationships between activation energy (Eo)> electric conductivity coefficient (IgRo) is valid and the function lgRo=a-bEo is applicable. These empirical relationships lgRo~f(Eo) provide additional information concerning typomorphic features of magnetite mineralization. They also make possible to estimate the location of the probe relative to syenite massif.