Caledonia Mining Corp Plc
For the period ended Aug 28, 2026. Filed Aug 28, 2026.
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Aug 28, 2026 · Filed Aug 28, 2026
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EX-99.1 · Surface
Surface
Following a period of successful surface trenching and reverse circulation drilling at Blanket, detailed in the announcement of July 23, 2026, a maiden surface mineral resource estimate is announced for Blanket. The exploration programme was designed primarily for the identification of shallow, near surface oxide and transitional material that may have the potential for low-cost heap leach processing.
The newly estimated surface mineral resource estimate highlights the potential for future near-surface mining opportunities and supports ongoing evaluation of lower-cost processing methods, including heap leach applications. No comparison is provided as this is the first surface mineral resource estimate reported for Blanket.
The following table provides the indicated and inferred mineral resource estimate for the oxide, transitional and sulphide mineralisation at Blanket in accordance with NI 43-101.
| June 30, 2026 | |||||
|---|---|---|---|---|---|
| Mineral Resource Classification | Zone | Cut-Off Grade (g/t) | Tonnes | Au | Ounces |
| kt · g/t · koz | |||||
| Indicated | Oxide | 0.3 | 180 | 0.91 | 5 |
| Transitional | 0.3 | 844 | 0.64 | 17 | |
| Sulphide | 0.6 | 228 | 1.07 | 8 | |
| Total - Indicated | 1 251 | 0.76 | 30 | ||
| Inferred | Oxide | 0.3 | 139 | 0.82 | 4 |
| Transitional | 0.3 | 173 | 0.78 | 4 | |
| Sulphide | 0.6 | 179 | 1.06 | 6 | |
| Total - Inferred | 492 | 0.89 | 14 | ||
Notes:
| 1. | Oxide and transitional cut-off grade applied 0.30 g/t. |
| 2. | Sulphide cut-off grade applied 0.60 g/t. |
| 3. | No geological loss applied. |
| 4. | Commodity price of $3,000/oz for RPOEE. |
| 5. | Mineral resources are reported as 100% attributable to Caledonia. |
| 6. | Mineral resources are reported in-situ. |
| 7. | Mineral resources are not mineral reserves and have no demonstrated economic viability. |
| 8. | Totals may not add due to rounding. |
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