Digital data, consisting of geological, geochemical and geophysical was loaned to the author by the Australian Geological Survey Organization. Weights of evidence is a data driven process whereby known mineral occurrences are combined with input maps. Binary maps are created indicating the presence or absence of known mineral occurrences over each unit within each map layer. Tests are performed to determine conditional independence. The posterior probability for each unique overlap condition is calculated and a map of posterior probabilities is created.
Fuzzy logic is a knowledge driven process.
The fuzzy values reflect the relative importance of a unit within each map layer and the map' S relative importance to other map layers. Two fuzzy operators had the effect of minimizing the input data, while two other operators maximized the input data. The fifth operator, the fuzzy gamma, merged data in a suitable manner. Both the weights of evidence and fuzzy logic processes identified several small areas and one major area of potential auriferous mineralization that may warrant field follow-up work.