Excelsior intends to restart operations of the Johnson Camp open pits, incorporating sulfide leaching technology to improve recoveries.
The only additional infrastructure required are, a new leach pad, crusher and agglomeration refurbishment, leach pad stackers and minor piping and pumping facilities.
Plans include mining oxide, sulfide, and transition material from the Burro and Copper Chief pits for approximately 20 years and heap leaching for an additional year to produce copper cathode at a capacity up to 25 million pounds per annum.
Total copper to be produced is 492 million pounds.
Work is ongoing to advance restarting mining from the existing Johnson Camp Mine pits
HIGHLIGHTS 2023 JCM PEA ($3.75 Cu price)
|Mine Life||21 years|
|Mineralized Tons||85.2 m tons|
|Total Cu grade||0.37%|
|Average Total Cu Recovery*||77%|
|Cu Produced||492 m lbs|
|Total Tons Mined||196 m tons|
|Initial Capital Leach Pad||$27.7 million|
|Initial Capital Crusher Refurbishment||$21.4 million|
|Initial Capital Mining||$9.8 million|
|Total Operating Cash Cost ($/lb Cu)||$1.95|
|Total Cash Cost ($/lb Cu)**||$2.24|
|After-Tax NPV/IRR (7.5% discount rate)||$180 million / 30.4%|
*Total copper recovery includes a combination of oxide, transition and primary sulfide mineral recoveries.
** Includes all operating costs, site G&A, royalties, non-income taxes, salvage, reclamation and closure.
*The PEA is preliminary in nature and includes inferred mineral resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves. There is no certainty that the conclusions reached in the PEA will be realized. Mineral resources that are not mineral reserves do not have demonstrated economic viability
|*million $ at 7.5% discount rate
Additional information about the JOHNSON CAMP HEAP LEACH PRELIMINARY ECONOMIC ASSESSMENT can be found in the technical report filed on SEDAR at www.sedar.com entitled