Accession Number : AD0781839

Title :   In situ Measurements of the Electric Rock Parameters by Means of a Wenner Four-Point Arrangement.

Descriptive Note : Scientific rept. no. 1,

Corporate Author : INNSBRUCK UNIV (AUSTRIA) ELECTRONICS LAB

Personal Author(s) : Oberladstatter,Michael ; Grissemann,Cristoph ; Nessler,Norbert

Report Date : 03 APR 1974

Pagination or Media Count : 38

Abstract : Different electrode materials for rock contacting purposes were tested and their efficiencies were compared. For a wattless collection of the potentials of the two inner points of a Wenner four-point arrangement impedance transformers with very high input resistance and low capacitance were applied. Earthing and screening problems were investigated. Measurements were conducted in a frequency range of 0.01 ... 10,000 Hz, the current density in the centerpoint of the arrangement amounted to j = 10 to the minus 10 power A/cm sq. (Author)

Descriptors :   *Rock, Electrical conductivity, Dielectric properties, Constants, Test methods, Measurement, Extremely low frequency, Austria, Very low frequency

Subject Categories : Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE