Regularised Models, Volume-Variance Relationships and Economics

Abstract

So far we have discussed various types of (semi) variograms and model fitting with examples from earth sciences. We notice that the variograms for gold and copper were based on point/punctual samples. Point samples do not possess any support/volume. However, in the case of variogram for Fe₂O₃ element of bauxite mineral, the variogram was based on core samples of length 0.5 m. The assay values represent the averages for core lengths of 0.5 m. Table 6.1 gives these values as also the average values for 1 m and 1.5 m lengths.