Pilbara Gold finds more depth at Mt York as resource growth takes shape

Deep drilling extends Mt York mineralisation

Pilbara Gold Limited (ASX:PGL) has extended wide gold zones to about 200 metres below the current Mt York resource boundary, giving its 2.1Moz Western Australian project another potential growth vector ahead of a planned 2027 prefeasibility study.

“Cross-section at Main Hill showing resource classification infill holes 26MYRCD096, 26MYRCD104 & 26MYRCD098 confirming wide mineralisation intercepts extending to bottom of…”

“Cross-section through Main Hill and drillholes 26MYRCD084 & 26MYRCD086, confirming mineralisation down-dip below 2026 Resource Pit Shell.”

Caption and image © Pilbara Gold Limited. From “Wide Gold Hits Below Mt York Resource”, 11 Nov 2026.

The strongest evidence came from Main Hill, where hole 26MYRCD086 returned 68 metres at 1.00g/t gold from 347 metres, including 15 metres at 2.56g/t. A second hole, 26MYRCD084, delivered 44 metres at 1.00g/t from 417 metres and extended mineralisation about 180 metres below the 2026 resource pit shell. Pilbara Gold said the resource remains open at depth along the full 4.2km mineralised trend.

The results build on the company’s October deep drilling results, which had already extended broad mineralisation below parts of Mt York. The latest holes are significant because they test continuity deeper beneath the existing resource rather than simply adding isolated near-surface hits.

Main Hill Extension adds higher-grade intervals

“Drill plan of the Mt York Gold Project showing drill holes reported in this release (yellow boxes). See Figures 1 & 2 for cross-sections.”

Outside the current resource envelope at Main Hill Extension, hole 26MYRC116 intersected 5 metres at 5.72g/t from 127 metres, including 1 metre at 16.92g/t. Other results included 15 metres at 1.26g/t from 242 metres and separate intervals of 4 metres at 2.22g/t and 10 metres at 1.55g/t in hole 26MYRC122.

Those headline grades sit alongside broad, lower-grade zones that Pilbara Gold says are typical of the banded iron formation hosting the deposit. The company’s structural interpretation points to folding and faulting thickening the BIF at Main Hill, with wide and sometimes higher-grade mineralisation associated with folds. That interpretation remains a geological model to be tested by further drilling, rather than a revised resource or mine plan.

Infill drilling targets resource confidence

Infill drilling inside the existing resource envelope also produced wide intersections, including 42 metres at 1.37g/t from 143 metres in hole 26MYRCD103, 54 metres at 1.01g/t from 254 metres in 26MYRCD096 and 26 metres at 1.77g/t from 142 metres in 26MYRCD105. These results are intended to improve resource classification, not to constitute a new estimate by themselves.

Image © Pilbara Gold Limited. From “Wide Gold Hits Below Mt York Resource”, 11 Nov 2026.

The company says all 2026 drilling results will feed into a new Mineral Resource Estimate, followed by a maiden Ore Reserve estimate for the PFS. Twenty-seven holes, the vast majority from Main Hill Extension, still await assays. Continued deep drilling is now focused on Main Hill and Main Hill Extension, with further testing also warranted at Breccia Hill where mineralisation remains open at depth.

Resource growth still needs technical conversion

The exploration results are encouraging, but they do not yet establish how many additional ounces can be added, whether the deeper mineralisation will be economically mineable, or how it may affect the project’s eventual pit design. The Whittle shell shown in the announcement uses a A$5,500 gold price for illustration and is expressly not a mine plan or development proposal.

Metallurgical, geotechnical, process engineering and design work is continuing alongside the drilling. The company has maintained its target for the PFS in 2027, with the updated resource and maiden reserve expected to provide the next substantive measure of whether these deep extensions can move from geological promise into a mineable inventory.