Effect of temperature, pressure and chemical composition on the electrical conductivity of granulite and geophysical implications

Electrical conductivities of three granulite samples (main minerals: plagioclase, quartz, and biotite) with different chemical compositions (WB, the weight percent of Fe2O3 = 5.49, 8.75, and 14.79 wt%) were researched using a complex impedance spectroscopic technique at 1.0–3.0 GPa and 623–1073 K from 10−1 to 106 Hz. The experimental results indicated that the granulite conductivities markedly increased with temperature and slightly decreased...