1887
Volume 42 Number 3
  • E-ISSN: 1365-2478

Abstract

Abstract

Knowledge of the declination and inclination of the total and induced magnetization vectors is normally required for the interpretation and analysis of magnetic anomalies. A new method of estimating the direction of the total magnetization vector of magnetized rocks from magnetic anomalies is proposed. The unknown declination and inclination (* and *) can be found by applying a reduction‐to‐the‐pole operator to the measured anomalies for different couples of total magnetization direction parameters ( and ) and by observing the variation of the anomaly minimum as a function of both and *.and * are estimated using the maximum of this function. Comparing our method to previous methods, one advantage is that our estimates are not zero‐level dependent; furthermore, the method allows inclinations to be well estimated, with the same accuracy as declinations; finally declinations are not underestimated. Our method is applied to a real case and meaningful results are obtained; it is shown that the feasibility of the method is improved by removing the low‐frequency components.

Loading

Article metrics loading...

/content/journals/10.1111/j.1365-2478.1994.tb00209.x
2006-04-27
2020-04-07
Loading full text...

Full text loading...

References

  1. BottM.H.P., SmithR.A. and StaceyR.A.1966. Estimation of the direction of magnetization of a body causing a magnetic anomaly using a pseudo–gravity transformation. Geophysics31, 803–811.
    [Google Scholar]
  2. FediM. and RapollaA.1990. Aeromagnetic anomaly shape analysis in the Southern Italian Region for the evaluation of crustal block rotations. Journal of Geodynamics12, 149–161.
    [Google Scholar]
  3. GrantF.S. and WestG.F.1965. Interpretation Theory in Applied Geophysics. McGraw‐Hill Book Co.
    [Google Scholar]
  4. MuniruzzamanM. and BanksR.J.1989. Basement magnetization estimates by wavenumber domain analysis of magnetic and gravity maps. Geophysical Journal97, 103–117.
    [Google Scholar]
  5. RapollaA., FediM. and FumeG.1989. Crustal structure of the Ischia‐Phlegrean Fields geothermal area, near Naples (Italy), from gravity and aeromagnetic data. Geophysical Journal97, 409–419.
    [Google Scholar]
  6. SchnetzlerC.C. and TaylorP.T.1984. Evaluation of an observational method for estimation of remanent magnetization. Geophysics49, 282–290.
    [Google Scholar]
  7. SilvaJ.B.C.1986. Reduction to the pole as an inverse problem and its application to low‐latitude anomalies. Geophysics51, 369–382.
    [Google Scholar]
  8. ZietzI. and AndreasenG.E.1967. Remanent magnetization and aeromagnetic interpretation. In: Mining Geophysics, Vol. II, pp. 569–590. S.E.G., Tulsa , OK .
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.1111/j.1365-2478.1994.tb00209.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