ANISOTROPY OF ELECTRICAL-CONDUCTIVITY OF DRY AND SATURATED KTB SAMPLES

Investigations on electrical conductivity of biotite gneisses and garn et amphibolites from the KTB borehole (3500-3800 m) were carried out i n two laboratories under different physical conditions. Gneisses exhib ited higher anisotropy of electrical conductivity than amphibolites. T he explanation of the observed anisotropy of electrical conductivity c an be found mainly in the structural features (in particular, the foli ation fabric) of these rocks. The results indicate the persistence of anisotropy of electrical conductivity to high temperatures (at least 1 000 degrees C).