Pilbara Gold Extends High-Grade Gold Mineralisation at Mt York with Drilling 50% Complete
Pilbara Gold has reported significant extensions and thickening of gold mineralisation at its 2.1Moz Mt York Project, with half of its +50,000m 2026 drilling campaign completed and resource updates on the horizon.
- High-grade gold intercepts extend at Main Hill and Main Hill Extension
- Drilling program increased to 60,000m amid encouraging results
- Resource update expected early 2027, PFS due mid-2027
- Multiple rigs active with further drilling planned at depth
- Mineralisation remains open at depth and along strike
Significant Gold Mineralisation Extends Deeper at Mt York
Pilbara Gold Limited (ASX:PGL) is advancing its 2026 drilling campaign at the Mt York Gold Project in Western Australia's Pilbara, with 50% of its +50,000m program complete. The latest assay results reveal thickening and continuity of high-grade gold mineralisation at both Main Hill and Main Hill Extension, reinforcing the prospect of resource growth beyond the current 2.1 million ounce base.
The company has increased its drilling target to 60,000 metres, driven by promising intercepts such as 22 metres at 2.04 g/t Au including higher-grade zones up to 4.4 g/t Au at Main Hill Extension, and multiple hits exceeding 5 g/t Au at Main Hill. These results confirm mineralisation remains open at depth, with some zones extending well below the optimised pit shell used in prior resource models.
Drilling Focus and Program Expansion
Five rigs are currently operating on site, with a sixth expected in September, targeting extensions along the 4.2-kilometre Banded Iron Formation (BIF) that hosts the deposit. Drilling is concentrated on infill and extensional targets at Main Hill and its northwest extension, where sulphidic BIF zones are thickening and showing vertically extensive mineralisation.
Notably, recent results include 6 metres at 2.93 g/t Au from 170 metres and 12 metres at 3.63 g/t Au from 295 metres at Main Hill, while Main Hill Extension has returned intercepts such as 5 metres at 5.47 g/t Au from 81 metres. These findings support the company's plan to update the Mineral Resource Estimate (MRE) in early 2027 and advance the Prefeasibility Study (PFS) targeted for mid-2027.
Resource Confidence and Project Development
The drilling program aims to increase the confidence of the resource classification within the optimised pit shell and to delineate new mineralisation below it. The Main Hill area shows multiple stacked mineralised zones within 60-100 metre wide BIF, while Main Hill Extension is revealing wider mineralisation at depth than previously known.
Additional drilling at Gossan Hill has also tightened spacing in underexplored areas, with 5 metres at 4.08 g/t Au intersected near a structural fault that may displace mineralisation. The company is undertaking further work to understand the potential for displaced zones.
Next Steps and Broader Exploration
Pilbara Gold plans to complete the expanded 60,000m drilling program at Mt York, continue assay reporting, and progress the PFS through the first half of 2027. An airborne electromagnetic (AEM) survey is scheduled to explore the greater Mt York area for additional sulphide targets. Concurrently, a 12,000m drilling campaign is underway at the Roe Hills Gold Project near Kalgoorlie, targeting maiden resource definition.
The ongoing drilling success and program expansion reflect the project's potential to grow beyond the current 2.1Moz resource, which was last updated in April 2026. With mineralisation remaining open and multiple high-grade zones confirmed, Mt York remains a key asset for Pilbara Gold’s development pipeline.
Bottom Line?
Pilbara Gold’s expanding drilling program and thickening high-grade zones at Mt York set the stage for a potentially larger resource update and a critical prefeasibility milestone in 2027.
Questions in the middle?
- How will pending assay results from the remaining 50% of the drilling campaign affect the resource upgrade?
- What impact will the thickening mineralisation at depth have on the project's mining and processing plans?
- Could the airborne electromagnetic survey reveal new sulphide targets that materially extend the Mt York resource?
