chargeability
A measure of the volume of mineral grains in the earth. Chargeability is measured using the IP method.
electromagnetics (EM)
A category of geophysical methods used to detect continuous rock bodies which are electrical conductors.
geophysics
The use of physics to learn about the earth and its surrounding atmosphere. Examples of geophysical methods which are used to locate ore bodies are gravity, magnetics, electromagnetics, and induced polarization.
gravity
A geophysical method used to detect rock bodies of different densities. The force of gravity is large over a dense body. The force of gravity is smaller over a rock body which is less dense.
induced polarization (IP)
A geophysical method generally used to detect disseminated sulphide mineralization (mineralization where the grains are not connected). Gold is often associated with this type of mineralization. A spectral IP survey involves an analysis of the data which estimates the size of the mineral grains.
magnetics
A geophysical method used to detect magnetic minerals. In general, magnetic minerals have a high iron content.
resistivity
A geophysical method which measures how well (or how poorly) the rock conducts electrical current. Resistivity data are measured simultaneously with IP data.