Geophysical surveys are an important tool in mineral exploration. They help to identify promising areas for further exploration, provide information on the size and depth of mineral deposits, and provide information about the geological structure of an area. If you are looking for more information about geophysical survey companies, you may visit here https://www.robertson-geo.com/.

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They use various physical methods to measure the physical properties of the subsurface. This includes the measurement of electrical resistivity, magnetism, gravity, seismic waves, and other methods. These surveys can detect the presence of subsurface structures and provide information about the composition and size of mineral deposits.

The electrical resistivity method measures the electrical conductivity of subsurface rocks and allows for the detection of metallic ore deposits. Magnetism surveys measure the magnetic field of rocks and can provide information about the nature of subsurface structures. Gravity surveys measure the gravitational pull of the subsurface rocks and can be used to detect subsurface structures and determine the size and depth of mineral deposits. 

They are a valuable tool in mineral exploration as they can provide information on the size and depth of deposits, as well as a better understanding of the geological structure of an area. This information can help to identify promising areas for further exploration and can also help to target areas for further evaluation.