Accession Number : AD0855246

Title :   A Laboratory Method for the Measurement of the Dielectric Constant of Rock and Soil Samples in the Frequency Range 100 Hertz to 100 Megahertz.

Descriptive Note : Technical rept. 18 Mar 68-18 Mar 69,

Corporate Author : GEOLOGICAL SURVEY DENVER CO

Personal Author(s) : Judy, M. M. ; Eberle, W. R.

Report Date : JUN 1969

Pagination or Media Count : 44

Abstract : A two-terminal bridge method for determining the dielectric constant of geologic materials over the frequency range 100 Hertz to 100 Megahertz has been developed by the U. S. Geological Survey. The method is designed to minimize (1) errors associated with the presence of electrode polarization by using nonpolarizing electrodes, (2) errors associated with parasitic impedances present in the measuring system at high frequency by calibration with known standards, and (3) errors associated with sample inhomogeneity by using relatively large samples. Using this method, representative values of the constant may be obtained for rock and soil samples with errors of less than 10 percent. (Author)

Descriptors :   (*SOILS, DIELECTRIC PROPERTIES), (*ROCK, ELECTRICAL RESISTANCE), TEST EQUIPMENT, FREQUENCY ANALYZERS, ELECTROMAGNETIC RADIATION, PROPAGATION, EXTREMELY LOW FREQUENCY, VERY LOW FREQUENCY, LOW FREQUENCY, CALIBRATION, LIMESTONE, SANDSTONE, SHALE.

Subject Categories : Geology, Geochemistry and Mineralogy
      Soil Mechanics
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE