Electrical conductivity measurement of serpentine at high temperature and pressure

The electrical conductivity of serpentine is measured at 1.0–3.0 GPa and 300–870°C. The effect of frequencies on electrical conductivity measurement is analyzed. The conduction mechanisms of serpentine before and after dehydration are discussed. Our experimental results show that the electrical conductivity of serpentine increases significantly after dehydration of serpentine, through which highly conductive layers (HCL) can be formed in the Earth’s interior.