Operator: Hudbay Minerals
Location: Peru
Term of Stream: Life of Mine
Stream Parameters: 100% of silver production and 50% of gold production
Upfront Consideration:  US$430M
Cost Quartile: 1st
Stream: Gold and silver
Primary Metal: Copper

Project Overview

Constancia is a copper, molybdenum, silver and gold mine, which began production in 2014. 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 open pit and Pampacancha high-grade satellite deposit. 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. The Pampacancha deposit is a porphyry related skarn system with minor local increases in copper-gold. Mining of the Pampacancha deposit is expected to begin in 2021.

More Information

For further information about the Constancia mine, please visit Hudbay Minerals Inc.’s website at Cost quartile information is sourced from Wood Mackenzie byproduct cost curves for gold, zinc/lead, copper, nickel, and silver mines.

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