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a. An instrument for measuring magnetic intensity. In ground magnetic
prospecting, an instrument for measuring the vertical magnetic intensity;
in airborne magnetic prospecting, an instrument for measuring the total
magnetic intensity. Also, an instrument used in magnetic observatories for
measuring various components of the magnetic field of the Earth.
AGI
b. A sensitive instrument for detecting and measuring changes in the
Earth's magnetic field, used in prospecting to detect magnetic anomalies
and magnetic gradients in rock formations.
See also: airborne magnetometer
Source:
Dictionary of Mining, Mineral, and Related Terms
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