Skip to main content
SpringerLink
Log in

Precision A.C. bridge set for measuring magnetic susceptibility of rocks and its anisotropy

  • Published:
Studia Geophysica et Geodaetica Aims and scope Submit manuscript

Summary

A bridge set for measuring the magnetic susceptibility of rocks and its anisotropy is described. The classical transformer bridge has been supplemented with an auxiliary compensating arm for balancing the bridge without any mechanical infringement of the measuring coils. By employing this principle and the appropriate methods a sensitivityof 4 × 10−8SI units (3 × 10−9 e.m.u./cm3) has been achieved for a sample of 8 cm3 in volume. In addition to its high sensitivity the device has a considerable accuracy, which makes it suitable for susceptibility anisotropy measurements even of samples with a very low susceptibility and only slight anisotropy. Well-reproducible results have been achieved for samples with a mean susceptibility of the order of10−5SI units with an anisotropy degree of only about 1.05.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. I. Scollar: A Simple Direct Reading Susceptibility Bridge. J. Sci. Instrum. (J. Phys. E), Ser. 2, 1 (1968), 781.

    Article  Google Scholar 

  2. K. W. Christie, D. T. A. Symons: Apparatus for Measuring Magnetic Susceptibility and Its Anisotropy. Geol. Survey of Canada, Dep. of Energy, Mines and Resources, Paper 69–41, Catalogue No. M44-69-41, Ottawa 1969.

  3. R. W. Girdler: The Measurement and Computation of Anisotropy of Magnetic Susceptibility of Rocks. Geoph. J., 5 (1961), 34.

    Article  Google Scholar 

  4. M. D. Fuller: AC Bridge Methods for the Measurement of Susceptibility Anisotropy. Conference “Procedures in Palaeomagnetism”, circulation of abstracts, Newcastle upon Tyne 1964; see also in Methods in Palaeomagnetism, D. W. Collinson, K. M. Creer and S. K. Runcorn (Editors), Elsevier Pub. Co., Amsterdam 1967.

  5. C. T. Zahn: New Absolute Null Method for the Measurement of Magnetic Susceptibilities in Weak Low-Frequency Fields. Rev. Sci. Instrum., 34 (1963), 285.

    Article  Google Scholar 

  6. F. Janák: Determination of Anisotropy of Magnetic Susceptibility of Rocks. Studia geoph. et geod., 9 (1965), 290.

    Article  Google Scholar 

  7. F. Janák: Anisotropie magnetické susceptibility hornin. Ph. D. thesis, Inst. of Applied Geophysics, Brno 1966 (not published).

  8. F. Janák: A Brief Outline of Magnetic Susceptibility Anisotropy of Various Rock Types. Studia geoph. et geod., 17 (1973) (in print).

  9. G. R. Hext: The Estimations of Second-Order Tensors, with Related Tests and Designs. Biometrika, 50 (1963), 353.

    Article  Google Scholar 

  10. М. И. Агеев: Алгоритмы (51–100). Вычислительный центр AH CCCP, M. 1966.

Download references

Author information

Authors and Affiliations

  1. Geophysics, national enterprise, Brno

    Vít Jelínek

  2. Ječná 29a, Brno

    Vít Jelínek

Authors
  1. Vít Jelínek
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Institute of Applied Geophysics.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Jelínek, V. Precision A.C. bridge set for measuring magnetic susceptibility of rocks and its anisotropy. Stud Geophys Geod 17, 36–48 (1973). https://doi.org/10.1007/BF01614027

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01614027

Keywords

Search

Navigation