Copper was observed in veins extending up to 67 metres down hole width from about 232 metres in the large A4 Dome.
The veins extend down to about 299 metres in the hole, which is being extended deeper to test other electromagnetic (EM) targets.
MOD’s managing director Julian Hanna said: “Our geologists are excited that MO-A4-003D has intersected a mineralised stockwork vein system, within what appears to be a large, intact dome.
“This opens up the possibility that any copper that was deposited in the A4 Dome is still there.”
Joint venture with Metal Tiger
The A4 Dome is within the T3 Dome Complex of about 700 square kilometres which forms part of a joint venture in which MOD holds 70% and Metal Tiger PLC (LON:MTR) holds 30%.
The JV holds extensive licences extending 200 kilometres along the centre of the Kalahari Copper Belt.
Hole MO-A4-003D is at 334 metres depth and is being deepened to at least 600 metres to test other conductive features defined from airborne EM data within the core of A4 Dome.
Drill core from MO-A4-003D at 243.1 metres depth showing massive chalcopyrite.
The hole will also test the prospective Ngwako Pan Formation (NPF) contact inferred below the target sequence.
Airborne EM proves worthwhile
Intersecting visible copper sulphides at A4 Dome reinforces the use of airborne EM that has identified many ‘buried domes’, several with similar geometry to the flagship development project at T3.
Drilling at the A4 Dome is the start of a major drilling campaign testing for vein hosted deposits at seven of these newly discovered domes with five rigs now operating.
Hanna added: “The wider significance is that this hole has also confirmed the benefits of using state-of-the-art EM to successfully target copper within these previously unrecognised domes.”
Hole MO-A4-003D is 1.8 kilometres west of the first hole at the A4 Dome, MO-A4-001D, which also intersected vein-hosted mineralisation at the eastern end of the dome.
Another hole, 1 kilometre west of the first hole, is at a depth of 328 metres and nearing the interpreted target sequence.
A third hole, 150 metres north of MO-A4-003D, has just started.
MOD last week upgraded the T3 resource to 60 million tonnes at 0.98% copper and 14 g/t silver for about 590,400 tonnes of copper and 26.9 million ounces of silver.