|
|||||
|
|
On the quantitative interpretation of magnetic anomalies by pseudo-gravimetric integration. |
|
| Authors: | Maurizio Fedi |
| Institution: | Dipartimento di Geofisica e Vulcanologia, Largo S. Marcellino, 10-Napoli, Italy |
| Abstract: | Poisson's theorem relates linearly the derivative of the gravity potential (taken along the total magnetization vector direction) and the magnetic potential due to a common, isolated source with constant density and magnetization distributions. From that theorem, two very useful functional transformations for magnetic anomalies were formulated by Baranov, that is the 'pseudo-gravimetric integration' and the 'reduction to the pole'. In this paper, it is shown that the first transformation is, in some sense, more useful than the reduction to the pole and, further, that its utilization presents noticeable advantages as regards the interpretation of magnetic anomalies. In fact, the pseudo-gravimetric integration, in contrast to the reduction to the pole, also provides a smoothing of the anomaly map and, in particular, reduces the degree of non-linearity existing in the mathematical relationship between the data and the source depth. In order to show this last property of the transformation, spectral expansion inversions by 2 |
| Keywords: | |