Magnetic surveys specify variations of the earth's magnetic field due to the presence of magnetic minerals. Small variations in the magnetic content of specific metals allow technicians to interpret rock types and assist in identifying resources.
Magnetometers provide better resolution of small, near-surface features. They respond strongly to iron and steel, brick, burned soil and many types of rock. It's even possible to detect very subtle anomalies caused by disturbed soils or decayed organic materials, like from a long ago campfire.
- Fractures and faults
- Water bearing structures
- Metallic constructions
- Magma chambers
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