Altair Minerals Limited (ASX:ALR) has disclosed that combined drilling across its South Oko (SOKO) and North Peters projects has surpassed 10,000 metres, while an in-situ grab sample taken from the floor of trench TR-W1-06 at SOKO returned 32.98g/t gold, located approximately seven metres along strike from an existing 10m @ 10.15g/t gold trench interval.

Key Points

  • Combined drilling at Greater Oko has exceeded 10,000 metres across SOKO and North Peters projects
  • RC drilling at SOKO has completed 102 holes for 6,262 metres at an average depth of approximately 61 metres
  • In-situ grab samples from trench TR-W1-06 returned 32.98g/t Au and 2.65g/t Au, approximately 7–10 metres along strike from the 10m @ 10.15g/t Au interval
  • Three distinct structural corridors — Western, Central and a newly identified Eastern Corridor — have been defined at the SOKO W1 target
  • An additional diamond drill rig has been secured for SOKO, and approximately 5,000 duplicate samples have been sent to Suriname for Photon Assay QA/QC testing

RC Drilling Defines Three Structural Corridors at SOKO W1 Target

The Phase I RC program at the SOKO W1 target has completed 102 holes for 6,262 metres, drilled on east-west fences across the W1 soil, trench and IP chargeability anomalies. RC logging has identified three distinct structural corridors over the W1 target: a Western Corridor, a Central Corridor, and a newly uncovered Eastern Corridor that was previously untested by deeper trenching. The Eastern Corridor recorded quartz and quartz-carbonate veining, sericite-silica and chlorite alteration, and disseminated pyrite. RC logging has also confirmed vertical continuity of host lithology and quartz veining below zones of trench mineralisation, with the Western Corridor underpinned by high-grade trench results of 10m @ 10.15g/t Au and 10m @ 1.42g/t Au.

High-Grade Grab Samples and New Parallel Shear Target Geochemistry

In-situ grab samples taken from the floor of trench TR-W1-06 returned 32.98g/t Au and 2.65g/t Au, located approximately seven to ten metres along strike from the existing 10m @ 10.15g/t Au trench interval. According to the filing, these results are indicative of mineralisation continuing along strike beyond the channel line sampled on the trench, consistent with an interpreted extension of the shear corridor beneath duricrust-capped ground. A new Parallel Shear Target, located approximately four kilometres west of W1, returned first-pass soil results of up to 1,669ppb (1.67g/t) Au, with a further continuous approximately 300-metre-wide zone of 59–201ppb Au recorded on line 694,400N, approximately 200 metres east of the peak result.

Assay Delays and Laboratory Contingency Measures

Both ISO-certified laboratories in Guyana engaged by Altair have recently resolved equipment failure and flux shortage issues, which the filing states resulted in country-wide assay delays. As a contingency measure, the company disclosed that approximately 5,000 duplicate samples have been sent to Suriname to test QA/QC on Photon Assays, with successful validation intended to provide the option to engage a third laboratory. Maiden assays for North Peters are expected in November 2026, with SOKO RC drill results expected to follow. An additional diamond drill rig has been secured for SOKO to allow rapid follow-up of mineralisation identified by RC drilling and deeper testing into the enriched core of mineralisation. All RC assay results for the reported holes remain pending.