Figure 1: (a) Sample locations colored according to rock categories. (b) Nearest neighbor estimation map of rock categories with sample locations overlaid. Figure 2: (a) Rock samples proportions. (b) Rock samples declustered proportions. For the hierarchies evaluated in this study, defined by global proportion ranks, Figure 2 indicates that category 5 exhibits a lower global proportion after declustering. This reduction causes category 5 to drop from third place in the ranking, which is now occupied by category 1, resulting in a minor modification to the hierarchical ordering (Table 2). Table 2 – Compared hierarchies of spatial allocation Step Sample Proportion Declustered Proportion 5 10 15 20 25 30 35 1 2 3 4 5 Rock samples Proportion ( ) Proportion ( ) 40 5 10 15 20 25 30 35 40 1 2 3 4 5 Rock samples declustered (a) (b) (a) (b)
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