**PERTH, Western Australia : ** Gateway Mining Limited (ASX: GML) has reported a significant expansion of its Cowza gold discovery within the Montague Gold Project, tripling the continuous strike length to 2.5 kilometers. Recent drilling results from the July 2026 campaign have confirmed high-grade mineralization in both weathered and fresh rock, positioning the prospect as a primary focus for resource definition later this year.
The discovery, located in the Yandal Greenstone Belt of Western Australia, was previously defined across an 800-meter zone. The latest step-out aircore (AC) and reverse circulation (RC) drilling has now connected these segments into a single, continuous structural corridor. This development marks a material upgrade in the project’s scale and de-risks the geological model as the company prepares for a maiden mineral resource estimate.
Systematic Extension of a 2.5km Corridor
The expanded 2.5-kilometer strike was confirmed through a systematic drilling program targeting a previously untested mafic-intermediate contact. Geologists identified a significant shear zone characterized by silica-sericite-pyrite alteration, a common signature for substantial gold systems in the region.
The expansion comes amid a broader surge in sector interest, as the gold price forecast for 2026 remains robust, supported by central bank demand and structural market shifts.
“The strike extension at Cowza is a pivotal development for the Montague project,” said a representative from the exploration team. “Tripling the defined mineralization zone to 2.5 kilometers demonstrates the potential for a large-scale, continuous gold system rather than isolated pods of mineralization.”
Drilling Intercepts and High-Grade Shoots
The latest results from Cowza highlight not only the continuity of the system but also the presence of high-grade shoots within the broader mineralized structure. Key intercepts from the 2026 campaign include:
| Hole ID | Interval (m) | Grade (g/t Au) | From (m) | Mineralization Style |
|---|---|---|---|---|
| GWAC1204 | 27.0 | 1.4 | 84.0 | Fresh Rock (End of Hole) |
| GWAC1211 | 16.0 | 1.9 | 88.0 | Transition/Fresh |
| GWAC1215 | 16.0 | 1.3 | 68.0 | Weathered |
| GWRC0542 | 4.0 | 4.7 | 96.0 | High-Grade Shoot (incl. 1m @ 17.4 g/t) |
| GWAC1198 | 46.0 | 0.4 | 68.0 | Broad Halo Mineralization |
The 27-meter intercept in hole GWAC1204 is particularly significant as it ended in mineralization with a grade of 3.3 g/t Au in the final meter. This confirms that the gold system remains open at depth and continues into the primary, unweathered rock.
Geological Significance of Fresh Rock Discovery
The transition from aircore drilling in the weathered “oxide” zone to RC drilling in the “fresh” bedrock is a critical milestone for any exploration project. Early-stage drilling at Cowza primarily focused on the top 100 meters, where weathering processes can sometimes smear or concentrate gold.
The recent confirmation of primary mineralization in fresh rock suggests that the source of the gold is a stable, hydrothermal system. Geophysical surveys have also identified a “demagnetization” signature along the 2.5-kilometer corridor, which often indicates the presence of gold-bearing fluids that have altered the surrounding magnetite-rich rocks.
This geological stability is essential for establishing a reliable mineral resource. With gold closing near $4,000 in recent months due to global geopolitical tensions, the economic viability of primary gold discoveries in tier-one jurisdictions like Western Australia has increased substantially.
2026 Operational Outlook and Next Steps
Gateway Mining is currently operating a multi-rig campaign across the Montague project area, with focus shifting toward the Cowza-Great Western structural trend. The company has outlined a clear path for the remainder of the 2026 calendar year:
- Infill RC Drilling: Targeting the 2.5-kilometer corridor to confirm continuity and better define high-grade shoots.
- Depth Extensions: Testing the down-dip potential of the primary system beyond the current 120-meter vertical depth.
- Regional Exploration: Aircore rigs will continue to test similar mafic-intermediate contacts along strike to the north and south of the current discovery.
- Resource Estimation: Data from the H1 2026 program is expected to form the basis of a maiden mineral resource estimate for Cowza in the second half of the year.
The company noted that the Cowza system remains open in all directions. Further assay results from step-out holes to the north are pending and are expected to be released in the coming weeks.
Western Australia Exploration Context
The Cowza discovery is situated in the Murchison region, a historical gold-producing province that has seen a resurgence in exploration activity. The use of modern geophysical techniques and a better understanding of the local stratigraphy have allowed juniors like Gateway Mining to identify targets that were overlooked during previous cycles.
Unlike previous decades where exploration was limited to shallow oxide pits, the current focus is on building “critical mass” by identifying multiple deposits that can share centralized processing infrastructure. The proximity of Cowza to existing resources within the Montague Gold Project suggests that any future development could benefit from significant operational synergies.
By Charls Pitts
