Geostatistical Modelling

Nested Structures

In some instances, a variogram cannot be characterised by one of the model variograms described previously. However, a combination of models may adequately represent such behaviour. The final variogram structure is therefore termed a nested structure (Fig. 13).

Spherical models are often nested, with each component model reflecting a particular scale of variability in the deposit. Modelling of nested structures is generally by trial-and-error.

Figure 13 - Variograms with Nested Structures