The quantitative appraisal of the mineral resource of a region can be performed in four stages: collection of information, selection of variables and models, quantification of map patterns and image analysis, and multivariate analysis. The algorithms for stage three may be based on concepts of mathematical morphology. During stage four, probability index maps can be produced for mineral deposits of different types by using a Poisson model or through logistic regression analysis. The estimated probabilities can be integrated for larger areas and combined with size-grade figures derived from sets of known deposits.

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