Global Defaults
On the Global Defaults tab of the Vein Network form, set the desired defaults for interpolation, tension and vein/dyke control across the vein network.
Interpolation model resolution
Select a Standard, Fine or Superfine resolution for the output model. The option you select will determine the size of the blocks (grid spacing) for the area of interpolation.
Note that the Fine and Superfine interpolation resolution options may require a modelling parameter file to be stored in your Windows Temp directory and may take up to 1.5GB of space.
Tension
Use the slider to set a tension value between 0 and 100, where smaller values favour smoothness (minimum curvature) and larger values favour accurately honouring the contacts (minimum error). The default is
Vein/Dyke Control
Choose how missing vein/dyke codes will be handled:
- Ignore non-matching holes and exclude them from the model
- Pinch the vein/dyke with an automatic hole size adjustment which is half the distance to the nearest hole.
If an IGNORED interval is sandwiched between two INCLUDED intervals, then the IGNORED interval is treated as if it was part of the INCLUDED lithology.
If, however, an INCLUDE interval is adjacent to an IGNORED interval, then the contact surface is not required to pass through the contact. Instead, the contact surface is required to pass through some point within the IGNORED interval.
Min and Max Thickness
(Optional) The Min thickness parameter defaults to 0 (i.e. not set).
The Max thickness parameter defaults to [Auto], which equals the length of the longest contact interval. Enter a value of 0 to disable the maximum thickness condition.
If Pinching is specified, then the Min thickness condition is only enforced in regions away from the pinch points. Both Min and Max thickness conditions are never enforced near contact points, since the vein thickness values there are dictated by the contact intervals.
Use correlated surfaces
The correlated surface option ensures that the trend/surface at the top and bottom of the vein is equal and thus should give more a larger degree of regularity.
Max Pinch Distance
When the Pinch vein/dyke control method is selected, the Max Pinch Distance field is enabled. Enter the maximum distance (from any drillhole) for the seam before it is pinched out. If the application determines that a shorter distance is more appropriate, it will use that distance.
