Magnetic Surveying

Magnetic surveing using a magnetometer and VLF-EM to find minerals, an example of geophysics.

  Magnetic Surveying Magnetic surveying works by detecting disturbances in the earth’s magnetic field – in mineral exploration these disturbances are usually caused by magnetite and pyrrhotite, the only two commonly occurring magnetic minerals. It works by detecting the presence of these minerals in varying concentrations, as follows: Magnetite and pyrrhotite may occur with economic […]