Cobra Resources (LSE:COBR) has reported three copper discoveries from reverse circulation drilling at its Manna Hill Copper Project in South Australia.
At Blue Rose West, hole MHRC0029 intersected 32m @ 0.70% copper (Cu) and 0.07 grams per tonne gold (Au) from 52m. This includes 12m @ 1.13% Cu and 0.08g/t Au from 56m.
The mineralisation occurs in potassic porphyry-style altered rocks outside the previously recognised skarn. Cobra says its position beside a large magnetic anomaly provides the ‘strongest’ geological indication yet for a ‘high-grade’ porphyry-style system at Manna Hill.
Hole MHRC0025 discovered the new Shadow Rose skarn approximately 200m south of Blue Rose, returning 58m @ 0.46% Cu and 0.15g/t Au from 12m.
The intersection includes 42m @ 0.56% Cu and 0.10g/t Au from 22m and 10m @ 1.09% Cu from 24m.
At Neptune Rose, approximately 500m north of Blue Rose, hole MHRC0024 returned 10m @ 0.39% Cu and 0.06g/t Au from 104m. Reported intersections are downhole lengths, with true widths yet to be established.
Managing Director Rupert Verco says the results support Cobra’s objective of identifying shallow mineralisation with the potential for scale.
“Our primary objective for this drilling is to test for scale that could support a shallow resource that could meet the criteria of low strip open pit mining,” Verco says.
“These initial results are delivering that thesis.”
Drilling program doubles
Cobra has completed 32 holes totalling more than 2,800m and expanded the program to 64 holes.
Six additional holes will test the porphyry-style alteration around MHRC0029, while four will assess the strike extent of Shadow Rose. Drilling is also planned at the Netley Hill porphyry target.
The results build on previous drilling that extended the Blue Rose copper-bearing corridor beyond 2.2km, as previously reported by Mining.com.au.
Cobra Resources is a UK-listed explorer advancing the Manna Hill Copper Project and Wudinna Rare Earth Project in South Australia.
Write to France Pinzon at Mining.com.au
Main image: Cobra Resources
