Star Copper Reports Overlimit Samples, Increases Grade Profile from Surface

Executive Summary

• Star Copper released over‑limit assay results from Phase 1 drill holes S‑050, S‑051 and S‑052, confirming a broad near‑surface supergene copper enrichment blanket (≈300 × 250 m to 100 m depth) with multiple intervals at or above the analytical upper limit of 10 % Cu.
• Significant intercepts include:
• Hole S‑051 – 226.54 m @ 0.70 % CuEq (0.44 % Cu & 0.25 g/t Au) from 14 m, plus higher‑grade zones of 1.13 % and 1.73 % CuEq.
• Hole S‑050 – 93 m @ 0.93 % CuEq (0.56 % Cu & 0.36 g/t Au) from 8 m.
• Hole S‑052 – 397 m @ 0.37 % CuEq (0.25 % Cu & 0.11 g/t Au) from 29 m, with higher‑grade intervals up to 0.75 % CuEq.
• The results validate the deposit model, showing continuity of supergene enrichment and transition to hypogene mineralization, supporting a robust target for Phase 2 drilling.

Key Details

• Overlimit Samples Received: Holes 50, 51, 52 (Cu < 10,000 ppm).
• Hole S‑051 Intercepts:
• 226.54 m @ 0.70 % CuEq (0.44 % Cu & 0.25 g/t Au) from 14 m.
• 90 m @ 1.13 % CuEq (0.65 % Cu & 0.47 g/t Au) from 14 m.
• 40 m @ 1.73 % CuEq (1.03 % Cu & 0.68 g/t Au) from 34 m.
• Hole S‑050 Intercept: 93 m @ 0.93 % CuEq (0.56 % Cu & 0.36 g/t Au) from 8 m.
• Hole S‑052 Intercepts:
• 397 m @ 0.37 % CuEq (0.25 % Cu & 0.11 g/t Au) from 29 m.
• 228 m @ 0.51 % CuEq (0.34 % Cu & 0.17 g/t Au) from 17 m.
• 90.95 m @ 0.75 % CuEq (0.51 % Cu & 0.23 g/t Au) from 29 m.
• Assay Methodology: Overlimit assays (Cu < 10,000 ppm) included for specified depth intervals in each hole; QA/QC follows industry standards with Bureau Veritas Laboratories analysis.
• Collar Coordinates & Depths:
• S‑050 – UTM E 339,834 / N 6,458,308, elevation 1,124 m, azimuth 270°, dip –85°, depth 101 m.
• S‑051 – UTM E 339,770 / N 6,458,307, elevation 1,120 m, azimuth 235°, dip –85°, depth 539 m.
• S‑052 – UTM E 339,850 / N 6,458,406, elevation 1,153 m, azimuth 240°, dip –83°, depth 674 m.
• Interpretation: First three holes intersected significant supergene enrichment in the top 100 m with a clear transition to hypogene mineralization below fault structures; vertical and lateral continuity observed to depth.
• Outlook: Phase 2 drilling underway to test step‑out targets, confirm hypogene extensions, and increase confidence in the deposit model. Additional assay results for remaining Phase 1 holes and ongoing Phase 2 work will be reported as received.

Notable Quotes

“The initial Phase 1 results confirm a broad near‑surface supergene copper enrichment blanket and provide greater understanding of the fault‑controlled relationship between supergene and hypogene zones.” – Darryl Jones, CEO & President

All forward‑looking statements are subject to risks and uncertainties; see cautionary note in the release.