Pilbara Gold Limited (ASX:PGL): How Far Could Mt York Mineralisation Extend Below the Current Resource?

Aditi Sarkar

11 November 2026 08:26 PM AEDT

Pilbara Gold Limited (ASX:PGL): How Far Could Mt York Mineralisation Extend Below the Current Resource?

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Highlights

Mt York hosts an April 2026 resource of approximately 2.08 million ounces of gold.
Recent drilling has tested mineralisation below the current resource pit shell.
Main Hill results included broad intersections outside existing resource boundaries.
An updated estimate, maiden reserve and prefeasibility study are planned for 2027.

Pilbara Gold Limited (ASX:PGL) is an Australian gold explorer and developer focused on its Mt York project in Western Australia's Pilbara region. The company has been drilling both within and beyond established mineral resource boundaries during 2026. Its latest Main Hill and Main Hill Extension results provide geological information about the depth of mineralisation, while resource classification and project studies remain separate steps.

Mt York Resource and Geological Setting

Pilbara Gold Limited (ASX:PGL) states that its wholly owned Mt York project lies approximately 100 kilometres south of Port Hedland. Mineralisation occurs within a banded iron formation across a trend of roughly 4.2 kilometres. The April 2026 mineral resource estimate totalled 61.7 million tonnes grading 1.05 grams per tonne gold, or approximately 2.08 million ounces, using a 0.40 gram per tonne cut-off.

The resource was constrained within a modelled open-pit shell. Its reported extent therefore does not automatically encompass every drilled gold intersection or imply that deeper material could be mined economically. Mt York is a development-stage project rather than a producing gold mine.

Deeper Main Hill Drilling

November drilling information for Pilbara Gold Limited (ASX:PGL) included an intersection of 68 metres at 1.00 gram per tonne gold from 347 metres in hole 26MYRCD086, including 15 metres at 2.56 grams per tonne. Hole 26MYRCD084 returned 44 metres at 1.00 gram per tonne from 417 metres. The company described mineralisation below the existing pit shell, with further interpretation and estimation needed.

At Main Hill Extension, hole 26MYRC116 returned five metres at 5.72 grams per tonne from 127 metres, including one metre at 16.92 grams per tonne. These intervals are exploration observations rather than additions to the current mineral resource. The supplied reporting does not adequately establish true widths, so the recorded intervals should not be interpreted as mineable thicknesses.

Infill Results and Development Studies

Pilbara Gold Limited (ASX:PGL) is also undertaking closer-spaced drilling within the current resource footprint. Hole 26MYRCD103 returned 42 metres at 1.37 grams per tonne gold from 143 metres. Such drilling may help improve confidence in geological continuity and the classification of resource material, but an updated mineral resource must be formally estimated and reported.

The company is preparing resource and maiden ore reserve estimates for a prefeasibility study targeted by June 2027. A mineral resource is not equivalent to an ore reserve: reserve estimation requires mining, processing, financial and other modifying factors to be evaluated. The study process should provide more detail on practical extraction assumptions.

Pending Work and Technical Limits

Pilbara Gold Limited (ASX:PGL) has stated that deeper drilling at Main Hill, Main Hill Extension and Breccia Hill is intended to investigate resource growth. At the time of the November update, assays remained outstanding for 27 holes. Their results may change the geological interpretation, including the continuity and scale of mineralisation beyond known boundaries.

Deeper Mining typically involves different access, waste movement and cost considerations from near-surface extraction. The project also requires ongoing metallurgical, design and economic assessment. Further drill intersections alone cannot confirm a larger ore reserve, extended mine life or a viable underground operation.

Key Insights

Pilbara Gold Limited (ASX:PGL) has reported gold intersections beyond the April 2026 Mt York resource envelope while continuing classification drilling. The key distinction is between evidence of mineralisation at depth and a formally updated mineable inventory. Pending assays, revised resource estimates and the 2027 study will test the development implications.

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