DIELECTRIC CONSTANT AND ELECTRICAL CONDUCTIVITY MEASUREMENTS OF MOIST ROCK: A NEW LABORATORY METHOD

ATTEMPTS BY PREVIOUS INVESTIGATORS TO MEASURE THE DIELECTRIC CONSTANT AND ELECTRICAL CONDUCTIVITY OF MOIST ROCK AND SOIL SAMPLES IN THE LABORATORY HAVE PRODUCED UNEXPECTEDLY HIGH VALUES OF DIELECTRIC CONSTANT AT LOW FREQUENCIES. THESE HIGH VALUES HAVE BEEN ATTRIBUTED TO MEASUREMENT ERROR BY SOME CRITICS, MAKING THEIR VALIDITY SUBJECT TO DOUBT. THE PRESENT INVESTIGATION WAS MADE TO TRACE THE SOURCE OF THE SUSPECTED ERRORS AND ELIMINATE THEM IF POSSIBLE. THE STUDY RESULTED IN THE DEVELOPMENT OF ELECTRO-CHEMICALLY REVERSIBLE ELECTRODES THAT APPEAR TO MINIMIZE MEASUREMENT ERRORS OF PREVIOUS INVESTIGATORS. MEASUREMENTS WERE MADE WITH THE NEW ELECTRODES OVER THE FREQUENCY RANGE 100 TO 1,000,000 CPS USING A GROUP OF ROCK AND SOIL SAMPLES CONTAINING VARIOUS AMOUNTS OF MOISTURE. VALUES OF DIELECTRIC CONSTANT WERE QUITE HIGH AT LOW FREQUENCIES BUT WERE LOWER THAN THE VALUES OBTAINED BY PREVIOUS METHODS BY AS MUCH AS AN ORDER OF MAGNITUDE. STATISTICAL CORRELATIONS WERE MADE AND EMPIRICAL EQUATIONS WERE DERIVED BY COMPUTER.

  • Supplemental Notes:
    • Vol 72, No 20, PP 5101-5115, 8 FIG, 4 TAB, 25 REF
  • Authors:
    • Scott, J H
    • Carroll, R D
    • Cunningham, D R
  • Publication Date: 0

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  • Accession Number: 00229045
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:38AM