SOME MAGNETIC AND ELECTRICAL-PROPERTIES OF BASALT ROCKS

Some magnetic properties and electrical characteristics at low and high (microwave) frequency of basaltic rocks are reported. The magnetic measurements show that basalt rocks are ordered ferromagnetically in particle size form. The low-frequency results indicate that basalt samples have relatively high dielectric constant. The Cole-Cole plot shows a part of inclined semicircle resulting from the spread of the relaxation times of the relaxators that operate in the sample bulk. The microwave results reveal that relatively strong interactions exist between the microwave (in X-band) and the matrix. The value of shielding effectiveness determined from the measured insertion and return losses was found to be about 15 dB per cm.