Sinclair Gold has extended gold mineralisation up to 230 metres beyond the northern Mt Henry resource boundary, including a 0.4-metre interval grading 122.7g/t. Drilling has also identified mineralisation 250 metres south of the main resource, with assays pending from 30 holes.
- 5.4m at 15.4g/t gold, including 0.4m at 122.7g/t
- Mineralisation extended 230m beyond northern Mt Henry resource
- High-grade result 250m south of the main resource
- Five rigs active across Mt Henry and Selene
- Assays pending from 30 holes outside the resource
High-grade drilling pushes beyond Mt Henry boundaries
Sinclair Gold Ltd (ASX:SGC) has produced its sharpest exploration result yet at Mt Henry, with drilling returning 5.4 metres at 15.4g/t gold, including a 0.4-metre interval grading 122.7g/t. The hit sits in the northern section of the Western Australian deposit, where broader drilling has extended mineralisation up to 230 metres beyond the current resource footprint.
The result is not an isolated narrow headline. Nearby drilling returned 39.6 metres at 1.4g/t, 27.9 metres at 1.0g/t and 16 metres at 1.7g/t, with higher-grade zones inside each interval. Sinclair’s latest round of results builds on the prior Mt Henry drilling extensions, which included intersections of 64 metres at 3.9g/t and 39 metres at 5.2g/t gold.
At the central section, drilling extended mineralisation 80 metres beyond the resource boundary. The most notable intercepts were 9.8 metres at 3.0g/t, including 1.1 metres at 12.4g/t, and 14.6 metres at 1.4g/t, including 0.6 metres at 15.8g/t.
New southern target opens a second growth front
The southern results add a different element to the story. Drilling at the existing resource boundary returned 11 metres at 1.7g/t, including 5 metres at 3.1g/t, while a separate hole 250 metres south of the main Mt Henry resource intersected 6 metres at 5.0g/t, including 1 metre at 25.0g/t.
That hole ended in mineralisation, so Sinclair plans to extend it with a diamond tail. The company says the intercept sits in basalt beneath a flat-lying intrusion and more than 100 metres below earlier Birthday Gift drilling. The geological setting makes the target relevant for follow-up work, but the result remains an exploration intersection rather than a defined resource or economic assessment.
Resource growth remains dependent on more drilling
Sinclair currently reports a JORC Mineral Resource of 47.9 million tonnes at 1.2g/t gold for 1.792 million ounces across Mt Henry, Selene, North Scotia and stockpiles. The company said it had roughly doubled the project resource since February, following the 1.8Moz resource upgrade, which was based on 20,426 metres of drilling. The new results could support another increase, but only after further drilling, interpretation and estimation.
Five rigs remain active across Mt Henry and Selene, with assays pending from 30 completed holes outside the current resource boundaries. Sinclair is planning its next Mineral Resource update before the end of FY27 and expects to outline its CY27 drilling program in the coming months.
All reported widths are downhole lengths, not stated true widths. That matters when translating attractive intercepts into mineable geometry. The next test is whether the pending assays show enough continuity and volume to turn isolated extensions, including the southern target, into a materially larger and potentially more useful resource.
Bottom Line?
The drilling has expanded the exploration footprint and delivered exceptional grades, but the investment case still turns on continuity, true widths and the next resource estimate.
Questions in the middle?
- Will the 30 pending holes confirm continuous mineralisation beyond the current Mt Henry boundaries?
- Can the southern intercept develop into a coherent mineralised zone beneath the Birthday Gift area?
- How much of the new drilling will translate into higher-confidence tonnes and ounces in the next resource update?