Rokeby Resources Ltd (ASX:RKB) Maiden Drilling at Hurricane Delivers High-Grade Gold and Antimony Results

11 September 2025

Price Sensitive Announcement $

Highlights:

• Shallow high-grade gold mineralisation intersected in 18 of 25 RC holes beneath outcrop with multiple intercepts grading >3g/t Au
• Best intersections include:
  o BCRC005: 6m @ 2.71g/t Au from 10m, including 4m @ 3.68g/t Au from 11m and 3m @ 0.57% Sb, including 1m @ 1.57% Sb from 14m (Bouncer South)

  o TDRC001: 4m @ 3.1g/t Au from 23m, including 1m @ 5.5g/t Au from 23m and 1m @ 4.14g/t Au from 26m (Tornado)

  o HMRC002: 5m @ 0.81g/t Au from 18m, and 2m @ 3.7g/t Au from 27m, including 1m @ 5.13g/t Au from 27m, and 7m @ 0.8g/t Au from 41m (Holmes)

  o BCRC007: 8m @ 1.28g/t Au from 12m, including 4m @ 2.01g/t Au from 12m (Bouncer South)

• Continuity confirmed, with >160m strike at Bouncer South and down-dip extensions demonstrated at Tornado and Hurricane
• Over 5 km of mapped quartz–vein strike, of which only a small portion has been drill tested in this maiden program
• Antimony confirmed in drilling, with grades up to 1.57% Sb
• Phase 2 drilling in planning to extend mineralisation at depth and along strike, and to advance newly identified veins and search for high-grade zones

Overview:

Rokeby Resources Limited announces assay results from its maiden reverse circulation (RC) drilling program at the 100%-owned Hurricane Project in northern Queensland.

The program comprised 25 RC holes for a total of 1,538m, targeting structurally controlled quartz–vein stockworks and high-grade gold–antimony lode systems across the Bouncer, Tornado, Holmes, Hurricane and Cyclone prospects. Drill hole locations were guided by detailed surface mapping and high-grade rock chip sampling.

The program delivered widespread gold mineralisation, with significant intersections reported in 18 of 25 holes completed. Best results include BCRC005: 6m @ 2.71g/t Au from 10m, including 4m @ 3.68g/t Au from 11m and 3m @ 0.57% Sb, including 1m @ 1.57% Sb from 14m (Bouncer South); TDRC001: 4m @ 3.1g/t Au from 23m, including 1m @ 5.5g/t Au from 23m and 1m @ 4.14g/t Au from 26m (Tornado); and HMRC002: 5m @ 0.81g/t Au from 18m, and 2m @ 3.7g/t Au from 27m, including 1m @ 5.13g/t Au from 27m, and 7m @ 0.8g/t Au from 41m (Holmes).

The program has confirmed that surface geochemical anomalies are underpinned by in-situ subsurface mineralisation. High-grade gold has been intersected across multiple prospects, with strike continuity demonstrated at Bouncer South and down-dip extensions indicated at Tornado and Hurricane. Drilling completed to date represents only an initial test of a broader system defined at surface by more than 5km of combined vein strike. Large areas between Bouncer in the northwest and Hurricane, Holmes and Tornado in the south remain unexplored. Collectively, the results indicate that the Hurricane Project hosts a coherent gold–antimony mineralised system with significant scale potential yet to be assessed.

Company Notes:

Rokeby CEO, Trevor Benson commented:
“The assay results from the maiden RC drilling program at Hurricane have confirmed widespread gold and antimony mineralisation across multiple prospects, validating surface anomalies and demonstrating continuity both along strike and down dip.”
“The fact that we intersected gold mineralisation in 18 of 25 RC holes drilled across multiple prospects and confirmed shallow high-grade gold beneath outcrops with multiple intercepts grading above 3g/t Au, gives us enormous confidence in staging the next Phase 2 drilling
campaign.”

Full Asx Announcement: https://discoveryalert.com.au/documents/6A1283305.pdf?utm_source=Discovery+Alert&utm_campaign=d0c726cec2-EMAIL_CAMPAIGN_2025_09_10_11_20&utm_medium=email&utm_term=0_11b9ba38b9-d0c726cec2-634171145