Kairos Minerals Ltd (ASX:KAI, OTCQB:KAIFF) has reported strong progress at its Mt York Gold Project in Western Australia, with new drilling results extending gold mineralisation and confirming high-grade shoots across multiple prospects. The results form part of an ongoing Stage 1 resource expansion program, aiming to increase the current 1.4-million-ounce (Moz) gold resource at Mt York.
With three diamond drill rigs on site, Kairos has completed 36 holes for 10,025 metres of drilling, ahead of schedule and within budget. The Stage 1 drilling program is focused on expanding gold resources by testing the continuity of high-grade mineralisation along strike and at depth.
These early results — from the Gossan Hill, Breccia Hill and Main Hill prospects — have shown positive signs for resource growth, with mineralisation extending and higher-grade zones forming part of a robust structural model.
Diamond drill hole location at Main Trend with results. Tenement M45/1306 covers the Main Trend Resource.
Notable drill results support resource growth
The latest assay results from 16 holes include some highly encouraging intercepts that will likely have a positive impact on the upcoming mineral resource estimate (MRE) update. Among the standout results are:
- 21 metres @ 1.87 g/t gold (Au) from 169 metres, including 9 metres @ 3.19 g/t Au (25MYDD009);
- 5 metres @ 4.26 g/t Au from 299 metres (25MYDD010);
- 34 metres @ 0.81 g/t Au from 242 metres, including 7 metres @ 2.66 g/t Au from 269 metres (25MYDD012);
- 24 metres @ 1.17 g/t Au from 222 metres, including 7 metres @ 2.62 g/t Au from 222 metres (25MYDD016); and
- 48 metres @ 1.03 g/t Au from 227 metres, including 11 metres @ 3.38 g/t Au from 264 metres (25MYDD017).
Typical higher-grade gold mineralisation at Main Hill from drill hole 25MYDD012. The NQ core (diameter 47.6mm for scale) is from 274-276m and is part of the intercept of 7m @ 2.66g/t Au. Left-hand core is 274-275m with grade of 4.12 g/t Au and the right-hand core is from 275-276m with grade of 2.9 g/t Au.
These results highlight consistent higher-grade mineralisation across the Main Trend, supporting the company's expectations for an updated MRE in the second half of 2025. The drilling has confirmed high-grade shoots both horizontally and along strike, with some areas showing potential for greater-than-300-metre extensions.
Drilling accelerates at Main Hill Prospect
Kairos has also expanded its drilling efforts at the highly prospective Main Hill Prospect. Historically difficult to access, the site now has a third diamond drill rig capable of low-angle drilling, which has enabled testing of areas that were previously under-drilled.
The company is eagerly anticipating the first results from this expanded drilling, with significant mineralisation already observed in banded iron formation (BIF) host rocks.
“The first results from Mt York continue to reinforce our belief in the potential scale of this project, and we are on track to deliver a new and much improved mineral resource estimate later in 2025, incorporating at least 18,000 metres of additional drilling results,” Kairos managing director Dr Peter Turner said.
“We continue to ask ourselves, ‘how big is the Mt York gold resource?’ and will increase and expand Stage 1 drilling if we believe the mineralisation continues to be open, which appears to be the case at the moment."
Long-section of the Mt York Gold Deposit (looking 030 NNE) and extension on PLS licence E45/2241 (far left of figure). The intercepts shown are desurveyed, downhole intercepts on the projected drill string.
Next steps and upcoming developments
Looking ahead, Kairos is focused on continuing drilling at Mt York with plans to complete the Stage 1 drilling by September. The company is also preparing for the Stage 2 drilling campaign, which will aim to convert Inferred resources to higher-confidence Indicated resources in early 2026.
“We are confident Mt York will become one of the Pilbara’s (and Western Australia’s) largest undeveloped gold resources with clean metallurgy once drilling is complete,” Turner said.
With drilling results expected through to September 2025, Kairos is preparing for a comprehensive MRE update later in the year, as well as ongoing studies for resource development and metallurgical testing.