Project Overview
Zinkgruvan is an underground zinc-lead-silver mine owned and operated by Boliden, located approximately 250 kilometers southwest of Stockholm, Sweden. This low-cost mine has been producing on a continuous basis since 1857. The Zinkgruvan orebodies are dominated by sphalerite and galena and are generally massive, well banded, and stratiform. Remobilization of galena and silver has occurred in response to metamorphism and deformation, and is most pronounced in the lead-rich western extension of Nygruvan and in the Burkland area. Copper stockwork mineralization has been identified in the structural hanging wall of the Burkland deposit. Chalcopyrite is the main copper mineral and occurs as coarse disseminations and patches within a marble host rock.
Zinkgruvan consists of an underground mine, processing plant and associated infrastructure, producing zinc, lead, and copper concentrates. Mineral processing comprises a conventional crushing, grinding and flotation milling process, with concentrates shipped to smelters in Europe. A separate 0.3 Mtpa copper treatment line in the processing plant was commissioned during 2010. This line was further modified during 2011 to allow it the flexibility to treat zinc-lead ore as well as copper ore. Overall mine capacity is 1.35 Mtpa.
Stream Details
| Date of Contract |
08-Dec-04 |
| Term |
Life of Mine |
| Stream |
100% of silver production |
| Upfront Consideration |
$78M |
| Delivery Payment Per Ounce |
$4.75 (annual inflation adjustment based on CPI) |
| Cost Quartile |
Second |
For more information on the Zinkgruvan mine, please visit: www.boliden.com (opens in new tab)