GEOPHYSICS FOR MINERAL EXPLORATION: A Manual for Prospectors
The purpose of carrying out geophysical surveys is to find out something about the rocks in the survey area. Geophysical methods all depend on measuring a physical property of rocks. Geophysical surveys generally look for concentrations of anomalously high values of the property being measured. The results of the survey are used to identify a target of interest, or to correlate the spatial variation of values of the property with variations in the geology. Thus the primary reasons to do geophysics are to get information on geology, and possibly to find targets of economic interest.