Altair Minerals Ltd
- ASX Code: ALR
- Market Cap: $258,528,386
Altair Minerals Diamond Drilling Begins at North Peters, Guyana
Altair Minerals (ASX: ALR) has commenced diamond drilling at its North Peters target within the Greater Oko Project in Guyana, marking the first active drilling stage of what the company has described as a fully funded, continuous 75,000m exploration campaign planned over the next 18 months. Altair minerals diamond drilling begins at North Peters Guyana as reverse circulation (RC) drilling at North Peters is expected to commence next week, while a third rig is set to begin RC drilling at the South Oko (SOKO) target this month.
For investors tracking Altair's build-out of its Greater Oko landholding, the update signals a clear shift from preparation to active execution across multiple drilling fronts.
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What is Happening on the Ground?
The Phase I programme now underway covers both the North Peters deposit area and the separate South Oko target simultaneously.
Phase I Drill Programme Summary
| Target | Drilling Type | Metres Allocated | Status |
|---|---|---|---|
| North Peters | Diamond (Infill) | 5,600m | Commenced |
| North Peters | RC (Step-out) | 2,000m | Expected next week |
| South Oko (SOKO) | RC (Maiden) | 15,000m | Expected this month |
| Phase I Total | ~22,600m | Underway |
At North Peters, diamond drilling is focused on infill work across the approximately 650m strike extent of the currently defined mineralised footprint, with holes averaging around 250m in downhole depth. According to the announcement, the objective is to resolve the continuity, geometry, and structural controls of a system that historic drilling has only partially characterised.
The RC component, averaging approximately 50m downhole, will test shallow ground located roughly 300 to 800m southwest of the current mineralised envelope. This represents genuine step-out drilling into territory with no prior drill coverage, according to the company.
The Historical Foundation Behind North Peters
North Peters is supported by a body of historic diamond drilling that has already returned broad and locally high-grade intersections. Altair notes that this historic dataset was not previously used to adequately resolve the structural controls on the mineralisation, which is precisely what the current programme is designed to address.
Selected Historic Diamond Drill Intersections, North Peters
| Hole ID | Interval | Grade | From | Notable Inclusion |
|---|---|---|---|---|
| MM0105 | 85m | 4.81 g/t Au | 24m depth | – |
| MM13808 | 89m | 2.40 g/t Au | 45m depth | 24m @ 7.17 g/t Au from 51m |
| MM4206 | 63m | 2.25 g/t Au | 55m depth | 11m @ 8.55 g/t Au from 57m |
| MM9407 | 57m | 1.40 g/t Au | Surface | 24m @ 2.63 g/t Au from surface |
Historic trenching on the edge of the current mineralised system also returned notable near-surface results, including 16.5m at 9.68 g/t gold and 39.0m at 3.78 g/t gold. According to the announcement, several of these trench intervals ended in mineralisation, meaning the results remain open and the system may extend beyond the tested area.
Understanding the Geological Model
A central feature of the North Peters story, as outlined in the announcement, is the concept of a structurally controlled gold system — specifically, the role of a regional thrust structure in concentrating high-grade gold.
Gold-bearing hydrothermal fluids, which are hot mineral-rich fluids moving through the earth's crust, tend to travel and deposit gold along geological weaknesses such as faults and contact zones between different rock types. Altair's geologists have identified two structural controls interpreted to be operating together at North Peters.
The first is described as the mineralised structure, where gold mineralisation occurs along the sheared contact between a granodiorite intrusion and a quartz monzonite porphyry. The second is referred to as the high-grade structure, where historically higher-grade intercepts appear to occur where a regional low-angle thrust crosscuts the mineralised contact.
Key Technical Definitions
- Diamond Drilling: A drilling method using a rotating diamond-tipped bit that recovers a cylindrical rock core, providing detailed subsurface geological information.
- Reverse Circulation (RC) Drilling: A faster, lower-cost method that returns rock chips rather than core, commonly used to test shallow targets quickly.
- Thrust Structure: A large-scale fault where rock has been pushed horizontally over adjoining rock at a low angle, often considered an important control on gold mineralisation.
- Infill Drilling: Additional drilling within an already defined mineralised area to improve geological understanding.
- Step-Out Drilling: Drilling beyond the edges of known mineralisation to test for extensions.
According to the announcement, this interpreted regional thrust structure extends approximately 3.5km southwest and 4.5km northeast of the current mineralised zone and remains untested outside the historic drilling footprint. Furthermore, if the structural model is validated through the current drilling, it may provide a basis for identifying analogous extensional targets in Phase II.
The Broader Scope of the 75,000m Campaign
North Peters is one of several targets being advanced under the Greater Oko umbrella, which the company describes as a substantial programme by junior explorer standards.
Greater Oko: Full Programme Allocation
| Target Area | Diamond Drilling | RC Drilling | Total |
|---|---|---|---|
| South Oko | 20,000m | 25,000m | 45,000m |
| North Peters | 10,000m | 5,000m | 15,000m |
| New Regional Targets | 10,000m | 5,000m | 15,000m |
| Total | 40,000m | 35,000m | 75,000m |
South Oko's initial 15,000m RC programme is expected to test the W1 and W3 targets, where surface geochemistry and geophysics have already defined two target zones. Soil sampling, auger drilling, trenching, and stream-sediment programmes are set to continue across the wider Greater Oko landholding during drilling, maintaining a pipeline of potential follow-up targets.
The company has also flagged the option to introduce two additional drill rigs during the fourth quarter, supported by recent expansion of camps, logistics, and personnel. Altair states that its Guyana operation has grown from one employee in September 2025 to approximately 200 operational personnel across camps and back-office functions.
Phase II: Designed Around Scalability
Subject to Phase I results, the Phase II programme at North Peters is intended to focus on extending mineralisation rather than simply validating what has already been identified.
Phase II North Peters: Planned Targets
- Approximately 4,400m of additional diamond drilling targeting along-strike and regional extensions, aiming to increase geological confidence toward assessment of a potential maiden JORC-compliant Mineral Resource
- Approximately 3,000m of additional RC drilling targeting a northwest extension underpinned by an untested chargeability high identified from geophysics, and a northeast extension testing the 1.1km unexplored zone between North Peters and the Old Granny target
The 1.1km gap between the northeastern point of North Peters (which historically returned 79.5m at 1.20 g/t gold) and the southwestern point of Old Granny (24.4m at 1.28 g/t gold) represents ground between two known gold-bearing zones that has not previously been drill tested, according to the announcement.
Guyana's Positioning Within the Guiana Shield
Altair's Greater Oko Project comprises approximately 428km² of contiguous exploration permits within Guyana's Guiana Shield. The company describes this region as a geological extension of the West African Birimian Greenstone Belt — the terrain associated with gold discoveries in Ghana, Ivory Coast, and Burkina Faso — while noting that the Guiana Shield equivalent remains comparatively underexplored.
Recent transactions in the region have, furthermore, drawn considerable attention to the jurisdiction's exploration potential.
Peer and Comparable Activity on the Guiana Shield
| Company | Event | Value |
|---|---|---|
| Reunion Gold | Acquired by GMining Ventures | Approximately $1 billion |
| G2 Goldfields | Acquired by GMining Ventures | Approximately $3 billion |
| Greenheart Gold | Listed peer | $163 million market cap |
| Founders Metals | Listed peer | $559 million market cap |
| OMAI Gold Mines | Listed peer | $2.0 billion market cap |
According to the announcement, Altair's Greater Oko landholding sits approximately 1.5km from a 5.9 million ounce discovery that is expected to move into production within the next 18 months. The company states that this proximity reflects the geological prospectivity of the surrounding area, though it cautions that similarities or proximity to other discoveries do not guarantee comparable results at Greater Oko.
Management Commentary
"It is my pleasure to report that Altair has commenced its maiden diamond drilling program at Greater Oko, marking the first active drilling stage of our fully funded continuous 75,000m exploration campaign over the next 18 months," said Faheem Ahmed, CEO of Altair Minerals. "With drilling underway at North Peters and SOKO expected to follow shortly, in parallel with regional target generation, Altair is entering a sustained period of drilling, results, and high-impact catalysts across Greater Oko."
Ahmed added that the company believes the localised broad and high-grade shoots identified from historic drilling at North Peters may form part of a larger structurally controlled regional system, though this remains subject to confirmation through the current drilling programme.
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Frequently Asked Questions
What is the total size of Altair's Greater Oko drilling campaign?
The company has outlined a fully funded 75,000m programme comprising 40,000m of diamond drilling and 35,000m of RC drilling, planned over approximately 18 months across North Peters, South Oko, and new regional targets.
What is Phase I designed to achieve at North Peters?
Phase I comprises 5,600m of diamond infill drilling and 2,000m of RC step-out drilling, aimed at validating known mineralisation, improving the structural model, and testing shallow extensions beyond the historic drilling footprint.
Why is the regional thrust structure significant?
According to the announcement, the broadest and highest-grade historic intersections occur where a regional low-angle thrust crosscuts the mineralised contact zone. Consequently, this structure has been interpreted to extend several kilometres beyond the current drilling footprint and remains largely untested.
When will South Oko drilling begin?
The company has stated that a third drill rig is expected to commence RC drilling at South Oko this month, targeting the W1 and W3 zones defined through surface geochemistry and geophysics.
What comes after Phase I if results are positive?
Subject to Phase I outcomes, Phase II is planned to include further diamond and RC drilling focused on extending the mineralised footprint along strike and regionally, with the aim of increasing geological confidence toward assessment of a maiden JORC-compliant Mineral Resource.
Want to Learn More About Altair Minerals and the Greater Oko Project?
With diamond drilling now underway and a fully funded 75,000m campaign set to deliver a sustained pipeline of results across North Peters, South Oko, and new regional targets over the next 18 months, Altair Minerals (ASX: ALR) represents a compelling exploration story on one of the world's most prospective underexplored gold terrains. To learn more about the company, its projects, and what this drilling campaign could mean for investors, visit altairminerals.com.au.
