Project Overview
Constancia is one of the lowest cost open-pit sulphide copper mines in South America. Located in Peru, Constancia is a copper, molybdenum, silver and gold mine, which began production in 2014. The Constancia operations also include the nearby Pampacancha satellite pit, a high grade copper-gold deposit where mining activities began in 2021.
The processing plant at Constancia is designed to process a nominal throughput of 81,900 tonnes per day 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. The Pampacancha deposit is expected to contribute to an increase in gold production at Constancia from 2023 to 2026 as higher grades enter the mine plan.
Stream Details
| Date of Contract |
08-Aug-12; 04-Nov-13 |
| Term |
Life of Mine |
| Stream |
50% of gold production
100% of silver production |
| Upfront Consideration |
$430M |
| Production Payment |
$416 Au and $6.14 Ag (annual 1% inflation adjustment) |
| Cost Quartile |
Second |
For more information on the Constancia mine, please visit: www.hudbayminerals.com (opens in new tab)