Prediction of Occurrence of Discrete Events - Geomathematics: Theoretical Foundations, Applications and Future Developments - page 149

Fig. 5.7 Map of posterior
probabilities based on
weights shown in Table 5.1
(without use of balsam fir)
(Source: Bonham-Carter
et al. 1990 , Fig. 2a)
Fig. 5.8 Au in balsam fir
map (Source: Bonham-
Carter et al. 1990 , Fig. 2b)
between production and posterior probability (Fig. 5.11 ). In other words, the larger
gold districts are associated with higher predictions of gold potential. Figure 5.12
shows an enlargement of the region roughly centered on the Sherbrooke pluton.
The masked areas are where posterior probability divided by its standard deviation
is less than 1.5, i.e. where the posterior probability is not significantly greater than
0 in a one-tailed significance test. The geological contacts are superimposed in
black, and the masked areas are either granite or Halifax Formation, or where the
biogeochemical Au map is uncertain. The rectangular areas A to E with posterior