Mineral exploration is the search for materials in the earth’s crust that appear in high enough concentrations and amounts to be extracted and processed for profit. Mineral exploration covers a wide range of objectives and activities that begin with the selection of a target area. The general principle works by extracting pieces of geological information from several places, and extrapolating this over the larger area to develop a geological picture. Exploration works in stages of increasing sophistication, with cheap, cruder methods implemented at the start, and if the resultant information is economically interesting, this warrants the next, more advanced (and expensive) techniques. However, it is very rare to find sufficiently enriched ore bodies, and so most exploration campaigns stop after the first/couple of stages.