Horizon List
Use Horizon List to define a horizon list, which can be used further down the panel when selecting horizons for compositing.
Define horizon list file
Select this check box to define a horizon list file to be composited.
GDCALC global file
Select this option to use the horizon list contained in an existing GDCALC global file (.gdc_glob). The drop-down list contains all .gdc_global files found in you current working directory. Click Browse to select a file from another location.
Horizon list file
Select this option to use the horizon list contained in an existing Horizon list file (.hzn).
In the situation where the deposit contains split horizons, one must consider how to treat qualities. There are a few strategies to consider:
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Quality information for the parent seam and any child horizons is considered and modelled entirely separately. Grid masks are used when reserving to ensure that only the parent qualities are used for the extent of the parent, and child qualities for the extent of the child horizon.
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The entire envelope of a split horizon is considered when compositing qualities. This means that the region from the top of the uppermost split to the base of the lowermost split is used across the extent of the parents and children. This involves compositing in partings between splits.
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Only child horizons are composited. A weighting method is used where parent seams exist to artificially split them in into child quality values. If there is no breakdown of quality sampling within a parent horizon, then each child is given the full quality value of the parent seam.
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The methodology in part c is combined with a Run of Mine (ROM) horizon compositing exercise to produce ROM grids. These grids combine and split on mining rules, not geological logging.
Related topics
- Composite and Model Qualities Overview
- Specifications
- Structural Data
- Horizon List
- Product/Waste
- Structure Definition
- Analytical Data
- Conditions
- Output
- Save
