FIELD: prospecting geophysics, possible use for finding and prospecting placers, containing ferromagnetic minerals.
SUBSTANCE: measurements of strength of magnetic field are performed serially for two opposite directions of modulus-even magnetization field strength. Ungrounded multi-coil loop of small size is utilized with direct current. Multi-coil loop is positioned during each measurement from one observation point to another at all area of search. Magnetization field is compensated in measuring point by means of small frame with current, which is rigidly engaged with measuring device.
EFFECT: improved efficiency of magnetic filming.
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