1887
Volume 29 Number 6
  • E-ISSN: 1365-2478

Abstract

A

A laboratory instrument was developed to investigate the electrical properties of rock samples with respect to changes of frequency, temperature and pressure. The instrument can be used to obtain general trends and typical values for geological media. It should be of particular interest in geothermal studies and research in the geophysical properties of rocks.

The design intervals for quantities under investigation were 20–300°C, 105‐4 × 107 Pa and 5 × 10−4‐103 Hz. Certain limitations exist on the simultaneous use of the highest values of temperature and pressure.

The main features of the instrument are: analog electrical outputs recorded by an recorder or observed on a scope with an attached camera (according to the frequency range); pressures produced by an oil hydraulic system in order to ensure electrical insulation of the sample; temperatures obtained by placing the pressure vessel into a thermostatically controlled room. Thus the monitoring instrumentation is directly accessible during the experiment. Information is also given about calibration procedures and examples of rock sample data are given.

Loading

Article metrics loading...

/content/journals/10.1111/j.1365-2478.1981.tb01035.x
2006-04-27
2020-09-24
Loading full text...

Full text loading...

References

  1. Alvarez, R.1973, Complex dielectric permittivity in rocks. A method for its measurement and analysis, Geophysics38, 920–941.
    [Google Scholar]
  2. Brace, W.F., Orange, A.S. and Madden, T.R.1965, The effect of pressure on the electrical resistivity of water‐saturated crystalline rocks, Journal of Geophysical Research70, 5569–5678.
    [Google Scholar]
  3. Dvorak, Z.1973, Electrical conductivity of several samples of olivinites, peridotites and dunites, as function of pressure and temperature, Geophysics38, 14–24.
    [Google Scholar]
  4. Finzi‐contini, G.1968, On induced polarization: non linear phenomena, Bollettino di Geofisica Teorica ed Applicata10, 290–298.
    [Google Scholar]
  5. Finzi‐contini, G.1971, Theoretical study on membrane polarization and complex mobility in moist rocks, Geological Survey of Canada Department of Energy Mines and Resources Paper 71‐1 (part B, report of activities: November 1970‐March 1971), Project630049, 23–24.
    [Google Scholar]
  6. Finzi‐contini, G.1978, Effects suggested by Theoretical Complex Mobility on model MT responses and related aspects, Atti dell'Istituto di Geofisica Mineraria, Università di Palermo, 1978/79, I, 141–148.
    [Google Scholar]
  7. Finzi‐contini, G. and Benvenuti, G.1972, Investigation of some non‐linear phenomena of induced polarization using a physical‐and‐mathematical model, Geophysical Prospecting20, 92–105.
    [Google Scholar]
  8. Finzi‐contini, G. and Norinelli, A.1968, Studio per polarizzazione indotta di campioni di bauxite pisolitica (Primi reisultati), Bollettino di Geofisica Teorica ed Applicata10, 204–218.
    [Google Scholar]
  9. Finzi‐contini, G. and Veliciu, S.1974, Electrical parameters for clay samples in the frequency and temperature dependence (first results), Geothermics3, 25–30.
    [Google Scholar]
  10. Finzi‐contini, G., Marchisio, M. and Losito, G.1974, Su alcuni comportamenti elettrici simulati di campioni di roccia, Rivista Italiana di Geofisica23, 183–191.
    [Google Scholar]
  11. Finzi‐contini, G., Losito, G., Nencini, C., Rocchi, M., Veliciu, S. and Vallebona, S.1974, A laboratory apparatus for electrically studying rocks‐sample responses versus both frequency and temperature, Unpublished report, University of Siena, 13.
    [Google Scholar]
  12. Losito, G.1972, Sulla dispersione alle basse frequenze della conducibilità elettrica e della permettività di rocce umide, Unpublished, Thesis, University of Siena, 144.
  13. Parkhomenko, E.I.1976, Electrical Properties of Rocks, Pergamon Press, New York , 314.
    [Google Scholar]
  14. Rocchi, M.1974, Effetti della temperatura sul comportamento elettrico in frequenza di campioni di roccia (intervalli: 10−2 Hz‐5· 103 Hz; 20°–90°C), Unpublished Thesis, University of Siena, 146.
  15. Shuey, R.T. and JohnsonM.1973, On the phenomenology of electrical relaxation in rocks, Geophysics38, 37–48.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.1111/j.1365-2478.1981.tb01035.x
Loading
  • Article Type: Research Article
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error