The Minto Mine is a copper-gold mine that commenced commercial production in October 2007. Owned 100% by Minto Explorations Ltd., a wholly owned subsidiary of Capstone Mining Corp.
A predecessor of Capstone acquired Minto Explorations and all other project interests, including a partially constructed but dormant construction site, in June 2005. Within two years from acquisition, the mineral resources were redrilled to mineral reserve standards, a bankable feasibility study was completed, project financing arranged, a new mine built and commercial production reached. Since then, the mine has been expanded twice, increasing throughput by more than 100%, and nine new deposits have been discovered in six years.
The Minto Mine is an open pit mining operation with conventional crushing, grinding, and flotation to produce copper concentrates with significant gold and silver credits. Concentrates are exported via the Port of Skagway, Alaska, to smelters in Asia for treatment and sale. In June 2012, the results of the pre-feasibility study Phase VI were released which incorporated the results of some earlier exploration success, extending the mine life to 2022.