Project Overview
Located in Peru, Constancia is one of the lowest cost, open-pit, sulfide-copper mines in South America,
producing copper, molybdenum, silver, and gold. The mine began production in 2014 from the main Constancia
pit, with operations moving to the high-grade, copper-gold Pampacancha satellite pit in 2021.
The processing plant at Constancia is designed to process a nominal throughput of 81,900 tpd and average
annual throughput of 29 million tonnes per year from the Constancia and Pampacancha open pits. The principal
products of the concentrator are copper and molybdenum concentrates. The tailings are pumped to the tailings
management facility for storage and water is returned via parallel piping to the process plant for reuse.
The Constancia deposit is a porphyry copper-molybdenum system which includes copper-bearing skarn
mineralization. Multiple phases of monzonite and monzonite porphyry have intruded a sequence of sandstones,
mudstones and micritic limestone of Cretaceous age. Recent drilling has extended reserves and resources to
the north of the pit.
The Pampacancha deposit is a porphyry related skarn system with gold grades that are significantly higher
than the main Constancia pit. Mining of the Pampacancha deposit commenced in the second quarter of 2021 and
is expected to be depleted in early December 2025. Gold grades are anticipated to decline as mining converts
back to the Constancia pit.
Stream Details
| Date of Contract |
08-Aug-12 |
| Term |
Life of Mine |
| Stream |
50% of gold production
100% of silver production |
| Upfront Consideration |
$430M |
| Delivery Payment Per Ounce |
$425 Au and $6.26 Ag (annual 1% inflation adjustment) |
| Cost Quartile |
Third |
For more information on the Constancia mine, please visit: www.hudbayminerals.com (opens in new tab)