Altair Minerals Limited (ASX: ALR) has reported a significant expansion of its South Oko (“SOKO”) W1 Target, with maiden infill and extensional soil assay results doubling the size of the anomalous footprint. The announcement positions ALR mining Australia exploration activity as one of the most closely watched on the Oko Shear Contact in Guyana.
 
Figure 1: Plan view of Altair South Oko area overlaid with soil sampling data and neighbouring deposits [Altair Minerals Limited]
The results confirm the W1 Target as the largest coherent greater than 100 parts per billion (ppb) gold (Au) soil anomaly identified to date along the Oko Shear. Two of the highest soil assay results recorded from this program returned 888 ppb Au (SK-SL-26-00737) and 571 ppb Au (SK-SL-26-00781), both located centrally within the W1 Target.
W1 Target Expands to a Major Gold Soil Anomaly
Altair Minerals Limited received a total of 203 soil samples in this batch. The results have expanded the geochemical footprint to a contiguous greater than 100 ppb Au anomaly measuring approximately 2.2 kilometres in strike length and up to 800 metres in width.
Figure 2: 2026 soil sampling program progress at SOKO with duricrust overlay [Altair Minerals Limited]
The anomaly remains open to the east. To the west, the duricrust a hard laterite crust on the surface is interpreted to be masking the underlying geochemical signature. The Company plans to test this zone via RAB and auger drilling to validate the true western extent of the anomalous footprint. Soil geochemistry also suggests the W1 Target may amalgamate with the W3 Target to the south, potentially forming a single, large-scale anomalous footprint.
ALR Mining Australia Assays Confirm Exceptional Continuity
Altair Minerals Limited CEO Faheem Ahmed said the results validated the 2022 soil sampling program while significantly expanding the anomalous footprint at SOKO. Mr Ahmed noted the width, strike length and continuity of the anomaly are analogous to if not more compelling than, the geochemical footprints that led to world-class discoveries in the district.
Figure 3: Altair Minerals Limited CEO Faheem Ahmed [Altair Minerals Limited]
He added that a geochemical anomaly of this magnitude does not typically occur in isolation. The intensity and coherence of the signature strongly suggest the Company is either proximal to an untested independent gold source or, as seen at Oko West, directly above a mineralised body. Approximately half of the 2026 soil sampling grid remains pending assay results, which will further define the W3 Target.
Trenching Geology Advances at South Oko
Altair Minerals Limited has extended Trench 6 further east due to favourable geological observations, now designated Trench 6A. Construction of Trench 7 has commenced. Recent trenches are now being built to a minimum depth of 6 metres below topsoil, targeting saprolite and saprock horizons below the duricrust and leached zones.
Figure 4: Double-benched trenches being employed at SOKO [Altair Minerals Limited]
Trench 6A transitioned from mafic intrusive and sheared mafic volcanic geology into:
- Predominantly volcaniclastic sediments encountering a sharp horizontal contact with an intermediate intrusive
- An alteration halo containing phenocrysts surrounding the sharp horizontal contact
- A zone of sheared volcaniclastics with alteration and veining parallel to the shearing plane
Guyana: A Tier-1 Gold Jurisdiction
Guyana has rapidly emerged as a premier gold jurisdiction within the Guiana Shield. It hosts the same Birimian Greenstone geology that has underpinned world-class gold discoveries across West Africa, including Ghana, Ivory Coast and Burkina Faso. Unlike its West African counterparts, Guyana remains significantly underexplored, making ALR mining Australia’s foothold in the region particularly valuable.
Figure 5: Greater Oko Project with four key target areas and comparison to G2 Goldfields and GMining Ventures landholdings [Altair Minerals Limited]
The Company holds a 590 square kilometre contiguous landholding at the Greater Oko Project, positioned 1.5 kilometres from a 5.9 million-ounce gold discovery expected to enter production within the next 18 months. Peers actively drilling across the Guiana Shield include G2 Goldfields (market capitalisation of approximately $2.0 billion), Reunion Gold (acquired by GMining Ventures for approximately $1 billion in 2024), Greenheart Gold (approximately $182 million), Founders Metals (approximately $606 million) and OMAI Gold Mines (approximately $1.4 billion).
ALR Mining Australia Market Snapshot
Altair Minerals Limited shares are currently trading at $0.024 per share on the ASX. The Company’s 52-week range is $0.001 to $0.029 per share, with a current market capitalisation of $137.37 million.
Figure 6: Altair Minerals Limited (ASX: ALR) one-year share price performance [ASX]
As ALR share price news continues to draw attention from the exploration community, the Company’s expanding pipeline at SOKO, combined with pending assay results for a further 161 extensional and 87 infill soil samples, is expected to provide additional newsflow in the near term.
Frequently Asked Questions
Q1. What is the South Oko W1 Target?
Ans. The W1 Target is a high-priority gold soil anomaly located on the Oko Shear Contact within the Greater Oko Project in Guyana.
Q2. What are the highest assay results returned from the current program?
Ans. Two of the highest results from this batch are 888 ppb Au (SK-SL-26-00737) and 571 ppb Au (SK-SL-26-00781), both located centrally within the W1 Target.
Q3. Why is ALR mining Australia’s position in Guyana significant?
Ans. Guyana hosts the same Birimian Greenstone geology that produced world-class gold discoveries in West Africa. The Greater Oko Project sits 1.5 kilometres from a 5.9-million-ounce gold discovery, within a region that has seen multiple billion-dollar peer companies established through grassroots exploration.
Q4. What are the next steps for Altair Minerals at South Oko?
Ans. The Company is advancing trenching at SOKO with Trench 6A and Trench 7 now underway. Approximately half of the 2026 soil sampling grid remains pending assay results.
