| Schedule of property, plant and equipment |
| | | | | | | | | | | | | | Corporate | | | | | | | Mining | | | Non-producing | | | Plant and | | | Right-of-use | | | office | | | | | | | interests | | | properties | | | equipment | | | lease assets | | | equipment | | | Total | | | | | | | | | | | | | | | | | | | | | Cost | | | | | | | | | | | | | | | | | | | Balance at January 1, 2024 | | $ | 226,819 | | | $ | 12,469 | | | $ | 128,228 | | | $ | 11,685 | | | $ | 237 | | | $ | 379,438 | | Asset additions | | | 14,226 | | | | - | | | | 4,794 | | | | 789 | | | | - | | | | 19,809 | | Change in decommissioning provision | | | (1,420 | ) | | | - | | | | - | | | | - | | | | - | | | | (1,420 | ) | Balance at December 31, 2024 | | | 239,625 | | | | 12,469 | | | | 133,022 | | | | 12,474 | | | | 237 | | | | 397,827 | | Asset additions | | | 20,701 | | | | - | | | | 8,137 | | | | 2,084 | | | | 190 | | | | 31,112 | | Asset disposals | | | - | | | | - | | | | - | | | | (31 | ) | | | - | | | | (31 | ) | Change in decommissioning provision | | | 614 | | | | - | | | | - | | | | - | | | | - | | | | 614 | | Balance at September 30, 2025 | | $ | 260,940 | | | $ | 12,469 | | | $ | 141,159 | | | $ | 14,527 | | | $ | 427 | | | $ | 429,522 | | | | | | | | | | | | | | | | | | | | | | | | | | | Accumulated depreciation and depletion | | | | | | | | | | | | | | | | | | | | | | | | | Balance at January 1, 2024 | | $ | (132,474 | ) | | $ | - | | | $ | (85,440 | ) | | $ | (8,223 | ) | | $ | (200 | ) | | $ | (226,337 | ) | Depreciation/depletion for the year | | | (14,172 | ) | | | - | | | | (8,615 | ) | | | (1,278 | ) | | | (26 | ) | | | (24,091 | ) | Balance at December 31, 2024 | | | (146,646 | ) | | | - | | | | (94,055 | ) | | | (9,501 | ) | | | (226 | ) | | | (250,428 | ) | Depreciation/depletion for the period | | | (8,347 | ) | | | - | | | | (5,830 | ) | | | (1,522 | ) | | | (11 | ) | | | (15,710 | ) | Balance at September 30, 2025 | | $ | (154,993 | ) | | $ | - | | | $ | (99,885 | ) | | $ | (11,023 | ) | | $ | (237 | ) | | $ | (266,138 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | Carrying value | | | | | | | | | | | | | | | | | | | | | | | | | at December 31, 2024 | | $ | 92,979 | | | $ | 12,469 | | | $ | 38,967 | | | $ | 2,973 | | | $ | 11 | | | $ | 147,399 | | at September 30, 2025 | | $ | 105,947 | | | $ | 12,469 | | | $ | 41,274 | | | $ | 3,504 | | | $ | 190 | | | $ | 163,384 | |
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