• Cork Tree Well delivers exceptional extensional and infill gold grades
  • Mineralisation up to 109.6g/t was intercepted at the Delta prospect
  • Mineralisation open to the north for up to 3km
  • Ongoing RC and diamond drilling will continue towards an updated MRE


+2000m of extensional and infill drilling hit thick, high grades up to 109g/t at the 303,000oz Cork Tree Well (CTW) zone at Brightstar’s Laverton gold project.

Brightstar Resources (ASX:BTR) portfolio consists of a >1Moz resource across its Menzies and Laverton gold projects.

It’s looking to turn its Menzies and Laverton projects into one large gold mining operation, utilising early cashflow from its small Selkirk mining JV with BML Ventures.

The latest nine-hole drill program at Laverton’s CTW focused on two defined areas; the Delta prospect to the north and a high-grade plunging shoot within the main CTW orebody.

The successful program returned numerous high-grade hits, including:

  • 1m @ 109.6g/t Au from 167m and 3m @ 8.7g/t Au from 197m (BTRRC224) – Delta;
  • 18m @ 2.75g/t Au from 83m (BTRRC225) – Delta;
  • 9m @ 3.05g/t Au from 203m (BTRRC229); and
  • 13m @ 1.24g/t Au from 156m (BTRRC232).

Brightstar MD Alex Rovira says the team was pleased to receive the final assays from the Laverton gold project RC program after successful completion of recent drilling at Menzies.

“The Cork Tree Well program had two defined objectives – the first being infill drilling at the Delta zone within the CTW mineral resource to provide better understanding on the structures controlling the higher-grade mineralisation.

“The second, was to test the higher grade plunging shoot within the CTW main system as a follow up to drilling earlier in the year, which indicated mineralisation that has the potential for possible extraction using underground mining methods.”


Delta: high grade and open for miles

Delta is currently the northern-most section of the Cork Tree Well system defined to date and is open for a further 3km along strike to the north.

It is also the highest-grade area with no historical mining and represents the first likely area of mining in a future mining scenario.

At Delta, a three-hole program intersected exceptional grades of up to 109.6g/t Au.

“Encouragingly, the results indicate that the structures containing the mineralisation are different to the main CTW zone and see both a lithological and orientation change, which may be due to the confluence of multiple structures hosting the gold mineralisation,” Rovira says.

“This requires further follow up and significantly increases the potential for definition of further mineralisation at Delta and to the north, which is open for a further 3km.”


Brightstar ASX BTR
The cross-section of hole BTRRC224, where drilling intercepted up to 109.6g/t Au. Pic supplied (BTR).


Cork Tree Well Main Zone: open at depth

At the CTW main zone, drilling was designed to test down plunge of higher-grade intersections discovered in May this year, which included 10m @ 4.54g/t Au from 192m.

Drilling intercepted 9m @ 3.1g/t Au from 203m at hole BTRRC229 which Brightstar says indicate that mineralisation is open at depth and illustrates the potential to grow the MRE down plunge.


More drilling to come

Brightstar says the results are being utilised in the planning stages of the next round of drilling at CTW as it looks to continue to grow the current 303,000oz.

Diamond drilling at Delta is being planned at targets that aim to inform a new geotechnical model for mine planning, while at CTW, the explorer has booked a 4,500m aircore drilling program for early next month.

Notably, a 2021 sub-audio magnetics (SAM) survey has indicated that the same lithological and structural features that host the CTW MRE continue for up to a further 3km to the north and remains to be drill tested.

The upcoming AC drill program is designed to generate anomalies for further aircore infill or direct RC drill testing in Q4 2023.

Meanwhile, a scoping study for the Menzies and Laverton gold projects is nearing completion.

“With the scoping study nearing finalisation, planning for further RC and diamond drilling at Menzies and Laverton is underway to commence later in the year in order to continue to grow the mineral resource base, upgrading resources within early-stage mining areas, and advance the projects towards near term production opportunities,” Rovira says.



This article was developed in collaboration with Brightstar Resources, a Stockhead advertiser at the time of publishing.

This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.