The Copper Solution Company
Excelsior is developing a low cost copper project within the copper porphyry belt of Arizona. Based on an initial production rate of 110 million pounds per year and a US$2.75/lb copper price, the Prefeasibility Study indicates a pre-tax NPV (7.5% discount rate) of US$1.24 billion, pre-tax IRR of 59.7% and a payback period of 1.8 years. Total initial capital expenditures (including contingency) are estimated at US$284.84 million with sustaining capital (including an acid plant) of US$602 million and an average life-of-mine direct operating cost of US$0.69/lb. These metrics are amongst the lowest per pound capital and operating costs for copper projects in North America.
The North Star deposit has Probable Mineral Reserves of 3.61 billion pounds (632 million tons at 0.29% copper) contained within the Measured and Indicated Mineral Resources of 3.91 billion pounds (683 M tons at 0.29%). Please refer to the Projects page for further information on the mineral reserve and mineral resource estimates and results of the Prefeasibility Study.
On July 7, 2015 Excelsior announced an upgrade to the mineral resource. The North Star deposit now contains Measured and Indicated Mineral Resources of 4.95 billion pounds (866 M tons at 0.29%). There is an additional inferred resource of 0.58 billion pounds (173 M tons at 0.17%).
See our disclaimer for important additional information.