1887
Volume 34 Number 8
  • E-ISSN: 1365-2478

Abstract

Abstract

All magnetic transformations are governed by simple differential relation between the observed and the transformed quantities. A magnetic map for any , at any , and for any given can be converted into one for which any one, two, or all three parameters differ.

Three new magnetic transformations are introduced: (i) reduction to equator, (ii) orthogonal reduction, and (iii) elimination of remanence. The first eliminates (or minimizes) the asymmetry and the lateral shift of the measured total field anomalies, exactly as in Baranov's reduction to pole. The second produces perfect asymmetry so that a symmetrical target lies vertically below the zero anomaly point, midway between the maximum and minimum. When remanence is a contributing factor, the direction of resultant magnetization must be known a priori in all cases, except for transformation of one component into another in the same area.

Explicit working formulae are presented for reduction to equator and pole, and orthogonal reduction.

Loading

Article metrics loading...

/content/journals/10.1111/j.1365-2478.1986.tb00525.x
2006-04-27
2020-04-05
Loading full text...

Full text loading...

References

  1. Affleck, J.1958. Interrelationships between magnetic anomaly components, Geophysics23, 738–748.
    [Google Scholar]
  2. Baranov, V.1957. A new method for interpretation of aero‐magnetic maps, Geophysics22, 359–383.
    [Google Scholar]
  3. Baranov, V.1975. Potential Fields and their Transformations in Applied Geophysics, Geo‐publication Associates, Gebruder Borntraeger, Berlin and Stuttgart .
    [Google Scholar]
  4. Baranov, V. and Naudy, H.1964. Numerical calculations of the formula of reduction to the magnetic pole, Geophysics29, 67–79.
    [Google Scholar]
  5. Hsu, H.P.1967. Outline of Fourier Analysis, Unitech Division, Associated Educational Services Corporation, New York .
    [Google Scholar]
  6. Leu, L.1982. Use of reduction‐to‐the‐equator process for magnetic data interpretation, Geophysics47, 445 (abstract).
    [Google Scholar]
  7. Lourenco, J.S. and Morrison, H.F.1973. Vector magnetic anomalies derived from measurements of a single component of the field, Geophysics38, 359–368.
    [Google Scholar]
  8. Oldham, C.H.G.1967. The (sin x)/x (siny)/y method for continuation of potential fields in Mining Geophysics II, Society of Exploration Geophysicists, USA , 591–605.
    [Google Scholar]
  9. Tomoda, Y. and Aki, K.1955. Use of functions (sin x)/x in gravity problems, Proceedings Japanese Academy31, 443–448.
    [Google Scholar]
  10. Tsuboi, C. and Tomoda, Y.1958. The relation between the Fourier Series method and the (sin x)/x method for gravity interpretations, Journal of Physics of the Earth6, 1–5.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.1111/j.1365-2478.1986.tb00525.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