Key Highlights

  • Mineralisation continues roughly 200 metres below the base of the 2.1 million ounce resource.
  • The deepest Main Hill result was 68 metres at 1.00 g/t gold from 347 metres, including 15 metres at 2.56 g/t.
  • The mineralisation sits along a trend of about 4.2 kilometres and remains open at depth.
  • A pre-feasibility study is targeted for the first half of calendar 2027.

Pilbara Gold (ASX:PGL) has reported drilling results from its Mt York Gold Project in Western Australia's Pilbara region that it says show gold mineralisation continuing roughly 200 metres below the base of its existing 2.1 million ounce resource. The company said the mineralisation sits along a trend of about 4.2 kilometres and remains open at depth, with further assays from the current programme still to come before the next resource model is built.

The deepest results came from the Main Hill area, outside the current resource. One hole returned 68 metres at 1.00 grams per tonne gold from 347 metres, including 15 metres at 2.56 g/t from 357 metres. Another interval of 44 metres at 1.00 g/t was reported from 417 metres, including 5 metres at 2.09 g/t.

Main Hill Extension and infill results

At Main Hill Extension, drilling returned 5 metres at 5.72 g/t gold from 127 metres, including 1 metre at 16.92 g/t, along with 15 metres at 1.26 g/t from 242 metres. Holes 26MYRCD084 and 26MYRCD086 were among those shown on a cross-section illustrating the deeper extensions.

Infill drilling, aimed at improving confidence within and around the existing resource, produced 42 metres at 1.37 g/t from 143 metres, including 9 metres at 3.99 g/t; 54 metres at 1.01 g/t from 254 metres, including 6 metres at 5.06 g/t; and 26 metres at 1.77 g/t from 142 metres, including 6.56 metres at 5.70 g/t. Managing director Dr Peter Turner described the deeper intercepts as "wide zones of gold mineralisation" well below the resource boundary.

Why the deeper intercepts matter

For a deposit already carrying a multi-million-ounce resource, the question is less whether gold exists and more how much of it could eventually be mined economically. Intercepts below a resource or pit shell can indicate potential for additional ounces or an underground component, but isolated holes do not by themselves define tonnage, grade continuity or Mining viability. Most of the deeper intervals reported grade around 1 g/t, so their economic contribution will depend on future modelling, cost assumptions and the gold price.

In a separate video interview, Dr Turner said the company completed around 50,000 metres of infill drilling at Mt York during 2026. He said the extensional holes beneath the current pit shell showed mineralisation continuing at strength.

Limitations and open questions

The new results are drilling data rather than a resource or reserve, and none of the deeper material has yet been included in any estimate. Assays remain outstanding for 27 holes, mostly from Main Hill Extension, so the overall picture could change once they are received.

Next steps toward a pre-feasibility study

Pilbara Gold said it is targeting completion of a pre-feasibility study in the first half of calendar 2027, with Dr Turner pointing to June 2027 in the interview. The company also plans to deliver an updated mineral resource estimate and a maiden Ore Reserve during calendar 2027. The pending assays are expected to feed into the next resource model, which will form the basis for that study work.

Investors following the project will be watching whether the deeper zones can be tied together into a coherent, estimable body and how the company balances open-pit and possible underground scenarios.