Compute Grade x Thickness Statistics for P-Data Grade Values

RockWorks | Borehole Operations | P-Data | GT Compositing

This program reads a column of P-Data that represents grade values (e.g. eUranium) and computes a variety of GT (grade x thickness) statistical information based on user-defined minimum grade and maximum waste-thickness cutoff values.

The output from this program may be stored in a variety of output formats, including the RockWorks datasheet for subsequent point-mapping and/or contouring.

Feature Level: RockWorks Standard and higher

Menu Options
Step-by-Step Summary

Input (Grade) P-Data Track: Click here to select the P-Data track that contains the grade data. For example, this might represent %eU3O8 (Uranium Grade Equivalent), ounces per ton Gold, etc.
P-Data Intervals
- Vertical Point Spacing: Click here to define the depth intervals at which the P-Data grade values are entered.
  ! This tool requires that the data be entered at regular depth intervals.
- Data Convention: Use these settings to define how the intervals are to be interpreted.
  - P-Data represents top of interval: If this option is selected, the interval top will be the original P-Data depth and the base of the interval will be the P-Data depth plus the user-defined Vertical Point Spacing (established above).
  - P-Data represents midpoint of interval: If this option is selected, the interval top will be the original P-Data depth minus 1/2 * Vertical Point Spacing. The base of the interval will be the original P-Data depth plus 1/2 * Vertical Point Spacing.
Compositing
- Cutoffs: This are the primary filtering values that are used to determine the extents of the ore intercepts.
  - Minimum Acceptable Grade: Enter the minimum value in the Input track to be considered. This value determines what is considered "acceptable" ore.
  - Maximum Acceptable Waste Thickness: This value defines the amount of waste, or "interburden" that is acceptable for zones that are bounded, above and below, by intervals that contain material that have "acceptable" grade values.
- Filtering: These options allow you to force the program to consider only input data within a specified depth and/or elevation range.
  - Depth Filtering: If checked, this setting will cause the program to only process data that is between the specified minimum depth and the specified maximum depth. We specifically avoid the terms "above" or "below" because the borehole may be inclined upwards (e.g. an underground exploration hole drilled upwards).
    - Minimum Depth: Sample intervals between the collar and this depth will be ignored.
    - Maximum Depth: Sample intervals between this depth and the total depth (TD) of the hole (TD) will be ignored.
  - Elevation Filter: If checked, the program will ignore all sample intervals above the maximum elevation or below the minimum elevation.
    - Minimum Elevation: Sample intervals below this elevation will be ignored by the program.
    - Maximum Elevation: Sample intervals above this elevation will be ignored by the program.
Apply to
- All Boreholes (Enabled and Disabled): Choose this if the calculations are to occur for all boreholes.
- Only Enabled Holes: Choose this option if the calculations are to occur only in boreholes which are currently enabled.
- Currently Highlighted Borehole (Single Borehole): Choose this if the program is to perform the computations for a single borehole. The currently-selected borehole is displayed here, click another from the list to change the active hole.
Save as I-Data
Check this to export the output from this program into tracks (columns) within the I-Data table as shown by the following example.

! Any existing data will be overwritten.
! If you need to add a new track to the I-Data table, click the rectangular button to access the I-Data Types Table.
- Thickness: Check this box if you want to store the intercept thicknesses.
  (The intercept is a zone of contiguous material that meets the criteria defined by the minimum acceptable grade and the maximum acceptable waste thickness, defined below.)
  - Track: Click to select the I-Data column in which the Thickness computations should be stored.
- Sum of Grade x Thickness: Check this box if you want to store the sum of all grades multiplied by the thicknesses for each sample interval within the associated intercept.
  - Track: Click to select the I-Data column in which the Sum of Grade x Thickness computations should be stored.
- Average Grade: Check this box if you want to store the average grade for all sample intervals within the associated intercept.
  - Track: Click to select the I-Data column in which the Average Grade computation should be stored.
- Maximum Original Grade: Check this box if you want to store the maximum grade value for all of the sample intervals within the associated intercept.
  - Track: Click to select the I-Data column in which the Maximum Original Grade values should be stored.
- Minimum Original Grade: Check this box if you want to store the minimum grade value for all of the sample intervals within the associated intercept.
  - Track: I-Data column in which the Minimum Original Grade values are to be stored.
Create Report
Check this item to generate an output report
- Report Type
  - Interval List: Choose this to output calculations by interval.
  - XYZ List: Choose this option to save an XYZ point for each borehole. The x-coordinate will contain the easting for the borehole collar, the y-coordinate will contain the northing for the borehole collar, and the z-value will represent the total for all "sum of grade x thickness" values for that particular borehole.
  - This data is intended for plotting borehole location maps in which the point label represents a summary to the borehole's economic value. These values may also be contoured, but (and this is important), inclined boreholes will produce misleading contour maps since the xy location for each point always corresponds with collar location. Please note that creating an XYZ file only makes sense if you're processing all of the boreholes (see "Apply to" option above).
  - Z-Decimals: Number of decimal places to use when saving the z-value (sum of GT values). This setting is useful if the XYZ file is to be used for creating a two-dimensional map as shown below.
- Output Options
  Click this tab to define the output format(s) for the report. (More info)
  - RwDat (RockWorks): Click in this button if you want the report generated in a RockWorks datasheet (.RwDat) format.
  - CSV (Excel): Click in this button if you want the report generated in a CSV file format for use in Excel.
  - TXT (Notepad): Click in this button if you want the report generated in a text (.txt) format.
  - RTF (Word): Click in this button if you want the report generated in an RTF file format for use in Word.

Access the RockWorks Borehole Manager program tab.
Select the Borehole Operations | P-Data | GT Compositing menu option.
Establish the desired program settings, as discussed above.
Click the Continue button to proceed with the computations.

RockWorks will read the contents of the input P-Data track, determine for each borehole the areas where the minimum grade and maximum waste parameters are met, and determine the thickness of those zones or intercepts.

The program will record the computations in the requested output report format(s).

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