Final results from diamond drilling at Lefroy’s Burns prospect have delivered more high-grade gold, copper and silver intercepts along with a new gold zone.

All three of the final holes returned multiple broad intersections of gold, copper and silver hosted by magnetite beccia veins within both porphyry and basalt.

Better results include 1m grading 33.7 grams per tonne (g/t) gold, 0.93% copper and 6g/t silver from 226.8m within 27.4m at 1.93g/t gold, 0.22% copper and 0.92g/t silver from a depth of 219.8m including in LEFRD262.

Notably, the three holes on the 40 north section have established at least 150m of vertical depth continuity of altered and mineralised porphyry and basalt 40m to the north of the 37m zone of gold-copper mineralisation in LEFR260 that is open along strike and at depth.

Lefroy Exploration (ASX:LEX) added that LEFRD261, which struck 15.4m at 1.02g/t gold, 0.19% copper and 1.05g/t silver from 154.6m, was extended 100m beyond the Eastern Porphyry and intersected a new interval of 24m at 0.22g/t gold from 334m within a carbonate veined sheared basalt.

This intersection demonstrates the potential of the footwall basalt position as a new target area that remains unexplored beneath Lake Randall.

Magnetic anomalies from the gold-copper-silver mineralised magnetite breccia veins now provide a first order targeting vector for additional Burns style systems, which given the multiple anomalies recognised along the 5km corridor, highlights the large scale of the system.

Planning is underway for the next phase of exploration with a broad step-out reverse circulation drill program due to begin in late September.

Results are also pending for a further nine RC holes.

Drill results

Lefroy noted that the delivery of multiple broad gold copper intersections, mainly hosted by porphyry, has established continuity 40m along strike of the discovery or baseline section.

This mineralisation dips steeply to the west and is open at depth and along strike.

It noted that the new results support a common developing theme that the gold-copper-silver mineralisation in either the basalt or porphyry host is related to the magnetite veining.

Additionally, the new gold intersection in the lower basalt expands the footprint of the system out under Lake Randall, which provides another area for drill targeting.




This article was developed in collaboration with Lefroy Exploration, 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.