Great Boulder finds ‘significant’ gold grades at Mulga Bill prospect in WA

Great Boulder Resources (ASX:GBR) reports the presence of ‘significant’ gold grades following its recent drilling campaign at the Mulga Bill prospect, which is part of its Side Well Gold Project in Western Australia.

The results, generated via the final two drill holes of a diamond drilling operation and ongoing RC and AC drilling campaigns, have defined key follow up targets and have confirmed a 6km strike length that remains open in both directions, with a potential expansion to the west.

Key results from diamond drilling include:

  • Hole 22MBRC005: 5.9m @ 39.37g/t Au from 84.3m, incl. 3.6m @ 63.79g/t Au from 85.4m, with 0.3m of core loss from 85.1m
  • Hole 22MBRC007: 1m @ 12.25g/t Au from 224m

Highlights from recent air-core drilling include:

  • Hole 22SWAC153: 3m @ 4.32g/t Au from 47m (Mulga Bill)
  • Hole 22SWAC163: 2m @ 1.07g/t Au from 93m (Mulga Bill)
  • Hole 22SWAC174: 3m @ 1.82g/t Au from 45m (Loaded Dog)
  • Hole 22SWAC175: 1m @ 8.51g/t Au from 60m (Loaded Dog)
  • Hole 22SWAC180: 4m @ 1.63g/t Au from 76m (Loaded Dog)
  • Hole 22SWAC183: 4m @ 1.16g/t Au from 72m (Loaded Dog)

Commenting on the results, Great Boulder Managing Director Andrew Paterson said: “This sensational result is in a shallower part of Mulga Bill, on the same section as our first high-grade intersection early last year.

 “The intersection is within the upper part of the weathering profile below the base of gold depletion, so there is likely to be a component of supergene enrichment in the gold grade.

 The significance of this result is that it supports our geological interpretation in that area, which has changed significantly since the first holes were drilled.

he significance of this result is that it supports our geological interpretation in that area, which has changed significantly since the first holes were drilled

It is also significant that the hole intersected a thicker zone of very high-grade mineralisation compared to the narrower intersections reported in earlier diamond holes.

RC drilling has been progressing well since the end of June, with holes completed at the southern end of the Mulga Bill trend as well as at Ironbark.

We are now drilling continuously rather than on a campaign basis, which means we expect a steady flow of results throughout the rest of the year and into 2023.”

The company also notes that the outstanding diamond drill results successfully verifies down dip continuity of the original and previously reported GBR ‘discovery hole’.

In addition, the returned assays from aircore drilling provide further encouragement within gaps in previous drill coverage along the Munga Bill deposit and have added definition for the Loaded Dog deposit.

The Sidewell Project is located in the heart of a multi-million-ounce field adjacent to Meekatharra in Western Australia and comprises a 48-block exploration licence that covers a total land tenure of 131.8km-square.

The project contains two parallel ‘high-grade’ lodes that consist of a 900m and 500m respectively, as well as the Mulga Bill, Matilda, Gabanintha and Jones Well priority targets.

With the diamond drilling operation now complete, Great Boulder announces that RC drilling at Ironbark and Mulga Bill is progressing well with 21 assays expected in August. 

Images: Great Boulder Resources Ltd
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Written By Adam Drought
Born and raised in the UK, Adam is a sports fanatic with an interest in Rugby League and UFC/MMA. When not training in Muay Thai and Brazilian Jiu Jitsu, Adam attends Griffith University where he is completing his final year of a Communication & Journalism degree.