BOA Resources has identified high-grade copper across two interpreted structural trends at Limestone Bore, more than 7 kilometres from known mineralisation at its Neds Creek project in Western Australia. The early-stage results expand the project’s exploration pipeline, but follow-up drilling is still needed to establish continuity and true widths.
- 32m at 1.91% copper, including 18m at 3.03%
- 29m at 1.73% copper, including 9m at 4.77%
- Two interpreted mineralised structural trends identified
- Limestone Bore lies more than 7km from known mineralisation
- Further drilling and assays from three other prospects pending
Limestone Bore delivers high-grade copper beneath cover
BOA Resources Limited (ASX:BOA) has added a new high-grade copper target to its Neds Creek exploration portfolio after maiden aircore drilling at Limestone Bore returned several strong intersections beneath transported sediments. The standout result was 32 metres at 1.91% copper from 27 metres, including 18 metres at 3.03% copper.
An 18-hole, 1,355-metre program also returned 29 metres at 1.73% copper from 3 metres, including 9 metres at 4.77%, plus a deeper 13-metre interval at 0.88% copper. Another hole delivered 10 metres at 1.83% copper from 67 metres, including 3 metres at 4.62%. All reported widths are down-hole intervals, however, and true widths have not yet been established.
Two copper trends emerge at a concealed prospect
BOA’s preliminary interpretation identifies an east-west striking, north-dipping structure associated with the 32-metre intersection, alongside a north-northwest striking structure represented by the other high-grade results. The company says the drilling has revealed two styles of mineralisation: shallow, copper-rich supergene material and deeper silver-bearing copper hosted by carbonaceous structures.
That deeper style resembles mineralisation previously observed at Ricci Lee and Rooneys, where BOA has reported a run of high-grade results in recent weeks. The new Limestone Bore discovery therefore sits within the same broader Neds Creek exploration story as the company’s recent Ricci Lee drilling, although its own geometry and continuity remain untested.
Regional significance extends beyond a single prospect
Limestone Bore is more than 7 kilometres west of other known mineralisation and was identified through shallow geochemical drilling rather than surface outcrop or historic mining. BOA says the result supports further testing of concealed structural targets across its 1,378-square-kilometre Neds Creek tenement package.
The exploration push is being supported by a recent $9.2 million share placement, with the second tranche subject to shareholder approval at the 30 November annual general meeting. BOA plans to resume drilling at Neds Creek this month, including work aimed at depth extensions at Ricci Lee and further testing at Rooneys.
Follow-up drilling and pending assays set the next test
Further aircore and reverse circulation drilling is planned at Limestone Bore to test the interpreted structures, their extensions and the continuity of mineralisation. BOA is also refining its structural model as it prioritises targets for the 2027 exploration program.
Assays from the Blockley, Ward and Mueller prospects remain outstanding, giving the company several near-term exploration results to work through. The immediate question is whether Limestone Bore’s high grades can be traced into coherent zones with meaningful true widths, rather than remaining a series of encouraging but isolated down-hole intersections.
Bottom Line?
Limestone Bore broadens BOA’s copper narrative, but the next drilling campaign must convert high-grade intercepts into evidence of scale, continuity and geometry.
Questions in the middle?
- Can follow-up drilling establish the true widths and continuity of the two interpreted Limestone Bore structures?
- Will the pending Blockley, Ward and Mueller assays add further evidence of multiple copper systems across Neds Creek?
- Can BOA maintain its planned exploration pace while securing shareholder approval for the placement’s second tranche?