• TSX: MIN
  • OTCQX: EXMGF
  • COPPER:

Gunnison Copper Project

COMMODITY: Copper
LOCATION: Arizona, USA
SIZE: 9,560 Acres
OWNERSHIP:  100%
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Industry-Leading Economics

  • US$807 million NPV and 40% IRR (After-tax, US$2.75 Cu price, 7.5% discount rate)
  • Direct operating costs: $0.65/lb & All-in costs: $1.23/lb
  • Low initial capital of $49 million
  • 24 years of mine life
  • 2.2 billion pounds of pure copper cathode to be produced

Reserves

North Star Mineral Reserves

  Short Tons (millions) Total Copper % Pounds of Cu (billions)
Probable 782 0.29 4.5

 

North Star Mineral Resources (as of July 7, 2015)

  Short Tons (millions) Total Copper % Pounds of Cu (billions)
Measured 199 0.36 1.43
Indicated 674 0.27 3.57
Measured + Indicated 873 0.29 4.99
Inferred 187 0.17 0.63

The Mineral Resources (0.05% cut-off) are inclusive of Mineral Reserves (0.05% cut-off). The oxide and transition portion of the Mineral Reserve has the potential to be mined using in-situ recovery methods with an estimated total copper recovery of 48%.

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Johnson Camp Mine (JCM)

The 100% owned Johnson Camp Mine is located just over one mile from the wellfield; copper-bearing solution will be processed here through the SX-EW facility into 99.999% pure copper cathode. Purchased in 2015 for only US$8.4 million, JCM saves Excelsior millions of dollars in capex.

Environmentally Friendly Copper Extraction

  • Low water consumption (most groundwater is recycled)
  • No groundwater contamination; no acid mine drainage
  • Excellent mine closure plan
  • Remote location and low permitting risk
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Corporate
Presentation

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Feasibility
Study

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In-situ
Recovery
Video

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In-situ
Sandbox
Video