Set the Downhole Direction

When your data is not mapped to drillhole IDs, you have to model your downhole variogram in a specific direction to replicate the drillhole direction. The direction you choose should reflect the average orientation of the drilling. Alternatively, you can use stand-alone variograms to generate and model variograms for any user-defined direction, allowing you to investigate the mineralisation continuity in multiple directions.

Note: The downhole direction can only be manually set if most of the drillholes have the same dip and dip direction.

Activity Steps

1. Select the Downhole Variogram (also called the Hole direction) from the Project Tree.
2. Select the Update tab in the Property Panel.
3. Enter the Dip and Dip Direction.
4. Enter the Bandwidths and Angular Tolerances.

Note: It is recommended that you set small Bandwidths and Angular Tolerances so that sample pairs are more likely to be from the same drillhole.