Great Boulder Resources has reported on the results of recent drilling at its Winchester copper-nickel sulphide project in Western Australia.
The Winchester tenements E38/2129 and E38/3311 are currently owned in Joint Venture with Ausgold Ltd under an earn-in and joint venture agreement, whereby Great Boulder is earning a 75 per cent interest with Ausgold free-carried through to a decision to mine. Great Boulder’s ownership of the tenements currently stands at 51 per cent.
Four holes were drilled at Winchester in late March as part of an EIS co-funded drilling program. Two deeper diamond holes were drilled to test down-plunge positions of the main sulphide mineralization, while two RC holes were drilled to test positions to the north and northwest of Winchester.
Diamond hole 20WNRCD002 intersected 4.4 m @ 0.8% Cu, 4.7 g/t Ag, 0.08% Ni and 0.01% Co from 201.86 m within the main sulphide shoot, including 1.14 m @ 1.3% Cu and 6.7 g/t Ag in a higher grade zone.
This mineralisation sits approximately 250 m down-plunge from the interpreted top of the shoot, or 80 m down-plunge from the nearest drill hole. Mineralisation remains open to the west and at depth. Hole 20WNRCD001 was designed to test the structure approximately 100 m east and down-plunge of 20WNRCD002.
This hole did not intersect any significant Cu-Ni mineralisation. It was extended through a black shale marker horizon to allow a down-hole EM survey to be conducted at a later date, to test for further sulphide conductors at depth.
Great Boulder Managing Director Andrew Paterson said the new results provide further encouragement at Winchester. “The new results confirm our interpretation of a shoot plunging north-northeast, and we now have continuity over 250 m down the structure.