The electric properties of eclogites from the Bohemian Massif under high temperatures and pressures

Summary The D.C. and A.C. electric conductivity and the dielectric constant of a set of 8 eclogites from the Bohemian Massif is studied under high temperatures (200–900°C) and pressures (up to 20 kb). The electric conductivity of the studied eclogites is strongly affected by the content of symplectite minerals: their conductivity increases with their concentration. The average increase of conductivity with pressure between 1 kb and 20 kb is about 50% and is manifested particularly below 4 kb. The correlation between the electric conductivity and the dielectric constant is very high (r=0.975) and allows for the values of one parameter to be estimated from those of another.