Geoelectromagnetic Investigation of the Earth’s Crust and Mantle formatIsbn:Softcover 9783642618031 dielectrics 18 dielectrics are delivering the biggest impact on the financial statements of the companies that boldly take on serving customers in entirely new ways measurements of deep conductivity can provide knowledge of the present state and temperature of the Earth's crust and upper mantle matter Experimental investigation of water containing rocks has revealed a pronounced increase of electrical conductivity in the temperature range D from 500 to 700 DC which may be attributed to the beginning of fractional melting