Regularised Models, Volume-Variance Relationships and Economics
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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.
KeywordsPoint Sample Core Sample Exponential Model Point Model Average Grade
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