Local Topcut Transition Model

The Local Topcut Transition model allows you to apply a topcut to each sample based on the distance from the centroid (centre) of a block model. The closer the sample is to the block centroid, the lower the degree of topcut applied to the sample grade. The degree of topcut increases until the specified distance is reached. Beyond this distance the Global Topcut is applied to the sample grades (see Global Topcut Analysis). The rate of transition across the centroid to sample distance is controlled by a transition rate defined by you. The local variability conditions expected in the geological modelling are essential when selecting the transition rate.

The image below demonstrates the impact of the transition rate on the topcut value.

Local Topcut Transition models can be inserted beneath any domain or assay in the Project Tree.