How Magnets and Gravity are Used in Mineral Exploration

Magnetic and gravity surveys differ from traditional seismic surveys in that they are passive, rather than aggressive. Instead of causing detonations or pressure waves, they measure variations in the magnetic and gravitational fields of the Earth. Although both can be used for minerals exploration, they have different strengths and weaknesses and often should be used together to give a more complete map of a potential mining location. The two methods use some common equipment. Aircraft can be used to create large-scale maps of both the magnetic and gravitational anomalies in a large region. Teams on the ground can visit points…

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