DEPTH ESTIMATION FROM TOTAL MAGNETIC ANOMALIES DUE TO SPHERES USING PARAMETRIC RELATIONSHIP | ||
| Journal of Egyptian Geophysical Society | ||
| Volume 7, Issue 1, 2009, Pages 35-49 PDF (542 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jegs.2009.380876 | ||
| Author | ||
| K.S. SOLIMAN | ||
| Geophysics Department, Faculty of Science, Cairo University, Giza, Egypt. | ||
| Abstract | ||
| This paper presents an approach for depth estimation of a buried sphere from numerical fourth-horizontal derivative anomalies obtained from total field magnetic data using filters of successive window lengths (graticule spacings). The method involves using a parametric relationship between the depth and a combination of windowed observations at four symmetric points around the origin of the source. The problem of depth determination from fourth-derivative total magnetic anomalies has been transformed into finding a solution to a non-linear equation of the form f (z) = 0. The present method can be applied to observed data even when the regional magnetic field is represented by a fourth-order polynomial. Finally, the validity of the method is tested on different synthetic examples with and without random errors and tested on a field example from Senegal, West Africa. | ||
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