Great Boulder Resources announced assays from two intersections of coarse visible gold intersected in RC drilling at the Mulga Bill prospect, within the Side Well Gold Project ("Side Well") near Meekatharra in Western Australia. The two visible gold intersections were submitted for analysis at ALS in Perth using the Photon assay technique. Photon assay is a non-destructive method using a coarse-crushed sample size of approximately 500g.

A second sample from each interval was also taken at the rig by scooping material from the 1m pile and submitted for photon assay. These are included for comparison only, with the second samples given an "A" suffix, however the A samples are not true duplicates. The large variability between the standard sample and "A" sample from each interval is not unusual when sampling and assaying coarse gold particles.

The lower intersection from 158m was in an area of significant groundwater where samples were wet and sample recovery deteriorated. As a result the extremely high grade and low repeatability of assays from this zone may be caused by a combination of abundant fine gold and possible upgrading of the sample material due to water washing away friable unmineralised material from the sample mass. This effect can be quantified using diamond core.

As explained in the ASX announcement of February 24, 2023, the hole was designed to infill an area of the Mulga Bill mineral resource in the Central area, south of the HGV area where previous bonanza grade intersections have occurred. The upper intersection corresponds to a west-dipping high-grade vein which includes a previous intersection of 10m at 28.74g/t from 96m (22MBRC067). Both locations show evidence of groundwater interacting with the mineralised structure at this depth and therefore there is likely to be a component of supergene upgrade to the gold content.

the lower visible gold intersection was originally thought to correspond to a thinner subvertical lode it may also be an intersection within a west-dipping vein. Further drilling is required to confirm this interpretation. Hole 23MBRC006 drilled immediately east of 23MBRC006A has not yet been assayed.

The hole was inadvertently set up at the wrong dip angle, and hence it was re-drilled as 23MBRC006A. This is why the two hole traces are in such close proximity. The remaining samples from hole 23MBRC006A are now being analysed by fire assay.

Once this is complete the Company will provide full details of all significant intersections in 23MBRC006A including any mineralisation that may be present on either side of these two visible gold occurrences. RC drilling is continuing. The Company will provide further information including gold assays as soon as the data are available.

An 11,000m aircore (AC) program is also underway testing a range of areas along the 6km-long Mulga Bill corridor including Flagpole, Loaded Dog and Mulga Bill North.