Altair Minerals Drills Three Fronts on Gold Shear That Minted A$4B in Takeovers
Key Takeaways
- Altair Minerals has commenced maiden RC drilling at both South Oko (SOKO) and North Peters simultaneously, bringing three active rigs across the Greater Oko Project in Guyana.
- The SOKO Phase I RC program targets 15,000m at the W1 target, which returned a headline trench intercept of 10m @ 10.15g/t Au — with the primary shear zone remaining open to the west and untested below surface.
- W1 is the largest >100ppb Au soil contour anomaly on the entire Oko Shear Contact, a structure where every geochemical hotspot identified to date has converted into a discovery.
- Adjoining companies on the same shear contact — G2 Goldfields and Reunion Gold — were acquired for a combined ~A$4B within 24 months, with a combined resource base of 9.4Moz Au at 2.5g/t Au across ~13km of strike north of SOKO.
- Altair holds ~14km of the Oko Shear Contact south of those deposits, with only ~3.5km geochemically covered to date, and is targeting a drilling rate of ~8,000m per month by October 2026 with a potential fourth rig anticipated at SOKO.
Three rigs, two fronts: Altair’s Greater Oko enters discovery-phase drilling
Altair Minerals (ASX: ALR) has commenced maiden Reverse Circulation (RC) drilling simultaneously at both its South Oko (SOKO) and North Peters targets within the Greater Oko Project in Guyana, bringing the company to three active drill rigs across the project. The SOKO program is a ~15,000m Phase I RC campaign, while North Peters is running a ~2,000m Phase I RC program alongside the ongoing 5,600m diamond drilling program already in progress.
This marks a clear transition: from systematic target generation into active, multi-front discovery drilling. Altair is targeting a drilling rate of approximately ~8,000m per month by October 2026 as operations scale toward steady state.
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South Oko’s W1 target: from surface anomaly to drill-ready system
The path to the drill bit at SOKO has followed a deliberate sequence. Systematic exploration — soils, auger drilling, geophysics, and trenching — has elevated the W1 target from a broad geochemical anomaly into a high-priority subsurface drill target backed by in-situ mineralisation data.
Six deep trenches at W1, results from which were announced on 24 August 2026, intersected gold mineralisation across a broad footprint spanning approximately ~1.2km east-west by ~1.0km north-south. The headline intercepts that directly triggered the RC decision were:
- TR-W1-06: 10m @ 10.15g/t Au
- TR-W1-09: 16m @ 1.32g/t Au
- TR-W1-04: 10m @ 1.42g/t Au
- TR-W1-08: 10m @ 1.13g/t Au
The geological context behind those numbers is where the investment case sharpens. The highest-grade results — particularly at Trench 06 (10m @ 10.15g/t Au) and Trench 04 (10m @ 1.42g/t Au) — were recorded at the western margin of each trench before duricrust (a hard, iron-rich laterite cap, typically 3–4m thick, formed by intense tropical weathering) forced termination. Trench 06 could only be extended a further 6m west following the mineralised intercept before encountering laterites and duricrust. Trench 04 was extended 32m west following its intercept before the same constraint halted progress.
Critically, both trenches ended while still within a foliated shear zone. The primary shear zone controlling mineralisation remains open to the west and untested below surface. In the company’s own assessment, Altair has only cut into the entry point of what may be its most substantially deformed and mineralised structural zone.
A second, potentially separate system has been identified within the broader W1 footprint. Trench 09 (16m @ 1.32g/t Au), located approximately ~1.2km east of Trench 04, appears to represent a distinct quartz-vein hosted structure sitting directly adjacent to the Oko Shear Contact, hosted in an intrusive rather than the sheared volcanic sedimentary units of Trenches 04 and 06. That eastern trench was also terminated early, stopped by a fragmented duricrust channel after extending only 10m east of the mineralised intercept.
Geophysics — specifically the ground Pole-Dipole IP Chargeability and Resistivity surveys — confirms structural continuity and a deep-tapping character beneath the duricrust, providing a vectoring guide for the RC targeting program.
RC program parameters
The Phase I RC program at SOKO has been designed for rapid, systematic, first-pass shallow coverage to establish continuity and geometry before diamond drilling follows up priority intercepts at depth.
- Target downhole depth: 50m
- Dip: 45°
- Azimuth: Alternating 90° and 270°
- Hole spacing: 70m
- Line spacing: ~400m
- Total meterage: 15,000m (Phase I)
Initial drilling focuses on four RC lines targeting the W1 target area. Diamond drilling will be deployed to test priority intercepts at greater depth once the RC program establishes the shallow framework.
Why SOKO’s address on the Oko Shear Contact matters
The Oko Shear Contact is an orogenic greenstone shear structure (a large-scale, deep-seated fault zone cutting through ancient greenstone rocks, historically associated with major gold deposits) that has been proven to extend greater than >1km vertical depth and remains open at depth. The entire corridor has demonstrated lateral extent, with intercepts approximately ~10km north of SOKO returning 60.0m @ 5.0g/t Au, 99.9m @ 2.2g/t Au, and 51.0m @ 3.0g/t Au (G2 Goldfields).
The discovery track record on this structure is the critical reference point for understanding what W1 represents. Adjoining companies covered approximately ~13km of the Oko Shear Contact to the north of SOKO through geochemical sampling, generating five discoveries and a combined resource base of 9.4Moz Au at 2.5g/t Au. Both companies involved have since been acquired:
| Acquiree / Acquirer | Deposits | Resource / Result | Outcome | Proximity to SOKO |
|---|---|---|---|---|
| G2 Goldfields / GMining Ventures | — | — | A$3B takeover (2026) | ~3.5km north |
| Reunion Gold / GMining Ventures | — | — | A$1B takeover (2024) | Regional |
| Combined (both adjoining companies) | Oko West, Ghanie, OMZ, Oko North, New Oko | 9.4Moz Au @ 2.5g/t Au (M, I & Inf) | — | ~13km strike north of SOKO |
Every geochemical hotspot identified on the Oko Shear Contact to date has converted into a discovery. Altair holds approximately ~14km of the same structural contact to the south of those deposits, yet only ~3.5km has been covered geochemically to date. Within that limited coverage, W1 has already emerged as the largest >100ppb Au soil contour anomaly on the entire Oko Shear Contact.
That context reframes W1 from a compelling local anomaly into a district-scale priority. The RC program is the first systematic subsurface test of a target that sits on the same structural address as some of the region’s most significant recent gold discoveries.
North Peters and the path to 8,000m/month
At North Peters, maiden RC drilling (~2,000m Phase I) is now running alongside the existing 5,600m diamond drilling program, putting two rigs on a target already underpinned by historically high-grade mineralisation. Prior intercepts at North Peters — including 85m @ 4.81g/t Au (announced January 2026) and 89m @ 2.40g/t Au (announced January 2026) — underpin the priority status of this front.
With three rigs now active across Greater Oko, Altair is targeting a drilling rate of approximately ~8,000m per month by October 2026, with a potential fourth rig anticipated at SOKO. Regional exploration programs continue to run in parallel: soil sampling, stream sampling, geological and structural mapping, and project-wide LiDAR and regional aeromagnetics (anticipated to commence shortly), all working to build the next pipeline of targets beyond the current active drill fronts.
CEO Faheem Ahmed
Faheem Ahmed, CEO, Altair Minerals
“This is the exploration platform we have been working toward. Three rigs are now operating, a potential fourth rig at SOKO is also anticipated, drilling throughput is scaling rapidly and the cadence of results should increase accordingly. We believe over the next 12 months, Altair is entering the most important exploration period in the Company’s history, with multiple opportunities for genuine value creation now being tested at the drill bit.”
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Investment thesis: multi-target, high-cadence results ahead
The key points from this development for investors watching Altair:
- Three active rigs across two priority targets simultaneously — results cadence is expected to accelerate materially as the program scales toward ~8,000m/month.
- W1 is the largest >100ppb Au soil contour anomaly on the Oko Shear Contact — a structure with a near-100% discovery conversion rate from geochemical hotspots — and maiden RC drilling is now testing it subsurface for the first time.
- Only ~3.5km of SOKO’s ~14km shear contact has been geochemically covered — material exploration upside exists beyond the current drill program, with extensional geochemistry advancing in parallel.
- Regional peer validation is concrete: combined takeovers of approximately A$4B on the adjoining contact within 24 months (G2 Goldfields and Reunion Gold) confirm the district-scale value potential of the Oko Shear Contact.
The next 12 months represents what management has described as the most consequential exploration period in the company’s history. With results flow from three (and potentially four) rigs expected to increase in cadence through the period, the pace of newsflow from Greater Oko is set to materially accelerate.
Ready to Learn More About Altair Minerals’ Greater Oko Project?
With three active drill rigs now testing the Oko Shear Contact — a structure with a near-100% geochemical-to-discovery conversion rate and over A$4B in regional peer acquisitions — Altair’s Greater Oko Project is entering its most consequential exploration phase to date. The W1 target’s maiden RC drilling campaign is now underway, testing what is already the largest >100ppb Au soil anomaly on the entire shear contact.
Explore the full details of Altair’s multi-front drilling strategy and regional discovery potential by visiting the Altair Minerals investor profile on Discovery Alert, where you can track results as the program scales toward ~8,000m per month.