A New Method of Magnetic Basement-Depth Determination.
NAVAL OCEANOGRAPHIC OFFICE NSTL STATION MS
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Using band-pass-filtered, low-level aeromagnetic data, an algorithm has been empirically developed to relate magnetic anomaly half-wavelengths to magnetic basement depths. This simple, rapid source-depth determination method makes no assumptions as to magnetic source-body shape or magnetization. Instead, the method uses the principle that the closer an observer is to the source of a magnetic anomaly, the shorter the wavelength of that anomaly will be. Tests in two magnetically dissimilar geographic areas show that the method produces valid results, yielding magnetic basement contours that conform to the shape of bathymetry or seismically determined basement, and values that are within 200 - 300 meters of those determined by these latter methods. Keywords Depth determination, Geomagnetism, Geophysics, Juan de Fuca area, Andaman Sea area, Magnetic source depth.
- Physical and Dynamic Oceanography
- Magnetic and Electric Field Detection and Detectors