Announcement Date: 2022-03-30
Announcement Type: Pre-Feasibility Study
Announcement Code: NI43-101
Company name: Excelsior Mining Corp.
Project name: Gunnison
Location: United States
Commodities: Copper
Highlight: PFS results incl. post-tax NPV (7.5%) of US$1,348.5M & IRR of 44.9%
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. The Gunnison Project is located about 62 miles east of Tucson, Arizona on the southeastern flank of the Little Dragoon Mountains in the Cochise Mining District. The property is within the copper porphyry belt of Arizona. The Gunnison Project hosts the North Star (formerly known as the I-10) deposit
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