1887
Volume 19, Issue 1-2
  • ISSN: 0812-3985
  • E-ISSN: 1834-7533

Abstract

Laboratory electrical conductivity (σ) anisotropy measurements were made on water saturated Palaeozoic black shales, mineralized schists, and banded and massive sulphides from the Mt Lyell region Tasmania. Macro- and micro-fabric and magnetic anisotropy studies were also carried out. Directional 1 kHz conductivity values were obtained in 9 directions for each of 10 samples. Reduction of these measurements produced the electrical conductivity tensor principal values and directions which were correlated with the fabric and magnetic data. The study suggests that: (i) a water saturated layered rock may be characterised by large σ:σ:σ anisotropy; (ii) the conductivity tensor representation may reflect petrofabric; and (iii) anisotropy may cause the current density to deflect significantly from the electric field direction.

© 1988 ASEG
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/content/journals/10.1071/EG988244
1988-03-01
2026-01-16

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References

  1. Bhathal, R. S. (1971)—‘Magnetic anisotropy in rocks’, Earth Sci. Rev. 7, 227–253.
  2. Clark, D. A., Saul, S. J. & Emerson, D. W. (1986)—‘Magnetic and gravity anomalies of a triaxial ellipsoid’, Explor. Geophys. 17, 189–200.
  3. Emerson, D. W. (1969)—‘Laboratory electrical resistivity measurements of rocks’, Proc. Austral. Inst. Min. & Metall. 230, 51–62.
  4. Emerson, D. W., Clark, D. A. & Saul, S. J. (1985)—‘Magnetic exploration models incorporating remanence, demagnetization, and anisotropy: HP 41C handheld computer algorithms’, Explor. Geophys. 16, 1–122.
  5. Hill, D. G. (1972)—‘A laboratory investigation of electrical anisotropy in Precambrian rocks’, Geophysics37, 1022–1038.
  6. Hrouda, F. (1973)—‘A determination of the symmetry of the ferromagnetic mineral fabric in rocks on the basis of the magnetic susceptibility anisotropy measurements’, Gerlands Beitr. Geophysik, Leipzig B2, 5, 390–396.
  7. Kerr, T. L. (1986)—‘Electrical anisotropy in sulphides and black shales — the determination and interpretation of the second order electrical conductivity tensor. B.Sc. Hons. thesis unpub. 2 vols. Department Geol. & Geophys. Uni. Sydney.
  8. Noltimier, H. C. (1971)—‘Determining magnetic anisotropy of rocks with a spinner magnetometer giving in-phase and quadrature data output’, Jour. Geophy. Res. 76, 4849–4854.
  9. Nye, J. F. (1957)—‘Physical Properties of Crystals’, Oxford, Clarendon Press, 322 pp.
  10. Shaub, Y. B. (1964)—‘Measurement of rock resistivity in alternating electrical and magnetic fields’, Izv. Geophys. Ser. 1964, No. 10, 1522–1526.
  11. Turner, F. J. & Weiss, L. E. (1963)—‘Structural Analysis of Metamorphic Tectonites’, McGraw-Hill, 545 pp.
  12. Girdler, R. W. (1961)—‘The measurement and computation of anisotropy of magnetic susceptibility of rocks’, Geophys. Jour. Roy. Astron. Soc. 5, 34–44.
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  • Article Type: Research Article

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