| Announcement Date: | 2023-02-28 |
|---|---|
| Announcement Type: | Pre-Feasibility Study |
| Announcement Code: | NI43-101 |
| Company name: | Excelsior Mining Corp. |
| Project name: | Gunnison |
| Location: | United States |
| Commodities: | Copper |
| Highlight: | Pre-Feasibility Study result incl. Post Tax NPV (7.5%) of USD $1167M & IRR of 37.5% |
| Resources: | only available to subscribers |
| CP/QP: | only available to subscribers |
| Announcement summary: | M3 Engineering & Technology Corporation (M3) was commissioned by Excelsior Mining Corp. (“Excelsior”) to prepare an updated Prefeasibility Study (PFS) in accordance with the Canadian National Instrument 43-101 (“NI 43-101”) standards for reporting mineral properties, for the Gunnison Copper Project (the “Gunnison Project” or the “Project”) in Cochise County, Arizona, USA. The Project utilizes in-situ recovery (ISR) methods to leach copper from a buried copper oxide deposit and extract the copper by conventional solvent extraction-electrowinning (SX-EW) technology. The ISR process involves injecting leach solutions acidified with sulfuric acid into the oxidized mineralization to get soluble copper into solution. Recovery wells pump the copper-bearing pregnant leach solution (PLS) to the surface for copper recovery by SX-EW into salable copper cathodes. |
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