In many regions geophysicists meet two great difficulties: rugged topography and polarization vector inclination. Magnetization vector is seldom vertical in the central and low latitudes, i.e. in the zone around the equator extending from Texas (USA) to Queensland (Australia). The inclination of polarization distorts habitual field patterns. The relief effect not only impedes geophysical surveys under mountainous conditions, but also distorts the results of observations. First, the effect of attraction of the bodies forming the relief is considerable. Second, when the data are recorded on an uneven surface, the vertical distance to the hidden body under study varies differently and anomalous vertical field gradient arises. The combination of these environmental factors with a complex geological structure has motivated the development of adequate methodologies.
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Boris E. Khesin
Vyacheslav V. Alexeyev
Lev V. Eppelbaum
- Springer Netherlands
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