Decay of Kimberlite Pipes . . . Sampling
Diamond Formation . . . Indicator Minearals

The location of the North Pole is crucial for geomagnetics. The pole actually migrates!

There are many ways to map what we can not see with our eyes. Sound waves can map underground faults and strata of rock. They can also see burried dinosaur bones for the paleontologist. Conductivity maps can tell us about underground aquifers. Magnetometers can locate bodies of buried magma which have an iron content different from surrounding rock. This differential allows ships to locate wrecks (sonar for wooden ships!) and airplanes to map some caves.

Magnetometers are used to produce maps which can show kimberlite pipes which may have diamonds in them.

The image to the left is just like those produced to find kimberlitic pipes. The are made at varying resolutions by flying a grid or walking a grid over a target area. The closer the grid lines, the more detail is shown in the resulting map the subsurface.