The KT-20 has the ability to accurately measure magnetic susceptibility, which is used extensively to determine the magnetic properties of rocks. This is vital for mineral exploration as magnetic susceptibility is related to the concentration and composition of magnetisable material contained in a sample. Magnetisable material includes magnetite, hematite, iron, titanium oxides and clay minerals (chlorite, smectite and glauconite). It can also display an estimated iron ore concentration (%) through the pre installed calibration curve.
The conductivity aspect of the KT-20 is particularly useful in mineral exploration because the target ore minerals generally have a high conductivity compared to the rock types with which they are associated. Metallic ore minerals can significantly affect the bulk resistivity/conductivity of a sample, even in small quantities.
The induced polarisation measurement with the KT-20 gives a dimensionless quantity known as chargeability. These measurements are influenced by minerals which conduct by electron flow, including pyrite and graphite. Clay minerals may also affect the IP measurements however this would be of a smaller magnitude.