Lithology, alteration, mineralisation and QA/QC: the logging tables

Data browser

The data browser is located in the center of the screen. It shows the tuples of the table indicated in the layer menu, filtered by the drillhole active in the selector.

The first column is fixed and shows the tuple's label (configurable in the layer menu). The remaining columns show the table's attributes. Scroll horizontally to see all the columns.

When selecting a cell:

• First column: Highlights the corresponding interval in the strip log.
• Other columns: A context menu appears with the following options:
  • Show details: Opens a window with all the tuple's attributes. Swipe left or right to navigate to the previous or next record.
  • Edit attributes: Opens the geocoder to modify the tuple's fields, starting with the field of the tapped column.
  • Delete: Deletes the tuple from the database. This action can be undone with the undo/redo button of the layer menu.

Quick access buttons

The toolbar on the right side of the screen provides direct access to the most frequent logging operations:

• Configurable button bar: any layer can be added as a quick access button from the layer menu (see Add/Remove from button bar), with a label of up to 3 characters. The buttons are drawn above the add button (+), in the order of the layer list. A tap opens the geocoder to create a tuple in that layer; if the layer has Positioned GPS sampling active, the current position is also saved along with the record.
• + (add button): Opens the geocoder for the table currently selected in the layer menu.
• Zoom +/-: Adjust the visible depth range in the strip log. It can also be done with gestures over the strip or over the depth ruler (see Strip Log).

Available tables

A drillhole project includes the following tables by default, all linked by Hole ID and the From / To fields:

• Lithology: Record of rock types, lithological units, and textual descriptions per interval.
• Alteration: Description of the types and intensities of hydrothermal or supergene alteration per interval.
• Mineralization: Record of ore minerals, textures, and visual grade estimates per interval.
• Structure: Structural observations recorded on the core, including type, angle, and description.
• Sampling: Record of the geochemical samples taken, with QA/QC data (standards, duplicates, blanks).
• Geotechnics: Geotechnical parameters such as core recovery, RQD, fracture count, and RMR classification.
• Downhole Data: Collar information (coordinates, azimuth, dip, total depth) and deviation surveys.
• Photos: Photographic record of the core, with association to specific depth intervals.

Tables can be added, renamed, or deleted from the Resource Manager according to the project's needs.

Core logging geocoders

Geocoders, in addition to the standard selectors (see Geocoders), have a special type of selectors for core logging: logging_id, logging_from, logging_to.

Geocoders are not created or edited from the application: they are defined in the geocoder editor spreadsheets provided by technical support (see the note at the end of Geocoders). What is described below corresponds to the configuration of those selectors within the spreadsheet; the full operation of the spreadsheets is documented separately, in the Geocoder Editor manual.

These must be assigned to the id, from, and to fields of the table, using the geocoder editor spreadsheet, similar to what is exemplified in the image:

These selectors are responsible for:

• Making the Hole ID, From and To fields mandatory and defining the position of the interval in the drillhole.
• The Hole ID field takes as its default value the last Hole ID entered.
• The From and To fields take by default the "To" value of the last interval recorded in that table for that drillhole, which allows continuous entry without gaps or overlaps.

In the OPTIONS column you can enable or disable section overlap by setting "overlap":true. With this option enabled, if you enter an interval that overlaps with another already recorded, the new interval is stored as is and trims the range of those it overlaps, as shown in the image:

1. Original section (blue).
2. The new interval (red) enters at the head or the tail of the original: it trims the original.
3. The new interval falls within the original: the original is duplicated and both copies are trimmed, one on each side of the new one.
4. The new interval completely wraps the original: both are kept and you will have to manually delete the one that does not apply.

If "overlap":false or is not defined, the software will block the entry of overlapping sections.