Västerbotten County, Northern Sweden
Barsele is located in northern Sweden, 500 km southwest of our Kittila mine in northern Finland. Barsele includes two types of mineralization: intrusive-hosted gold as well as gold-rich volcanogenic massive sulphide (VMS). Agnico Eagle acquired 55% interest in the property in 2015, and we manage the exploration program.
55%; can earn additional 15%
Barsele contains intrusive-hosted gold mineralization in the Central, Avan and Skirasen zones, which appears to be similar to the Goldex deposit. The property also hosts gold-rich polymetallic VMS mineralization in the Norra Zone. Gold is generally associated with arsenopyrite and low base metal content, but also occurs as native metal locally. Since mid-2015, we have conducted trenching, structural mapping and drilling, compiled geophysical data, carried out downhole geophysical surveys, and conducted hyperspectral diamond core scanning, environmental studies and community relations work. The project has an initial inferred mineral resource (the Company’s 55% portion) estimated at 661,000 ounces gold (11.9 million tonnes grading 1.72 g/t) as of December 31, 2016. This estimate can be subdivided into open pit inferred mineral resources of 133,000 ounces gold (4.1 million tonnes grading 1.02 g/t) and an underground inferred mineral resource of 528,000 ounces gold (7.9 million tonnes grading 2.08 g/t).
The Barsele deposit is located at the intersection of the Skellefte and Gold Line metallogenic trends. The project area covers a sequence of metasedimentary and metavolcanic (Härnö formation) rocks of the Proterozoic Svecofennian system.
The district shows strong potential for gold and base metal mineralization and ore structures. There is an important spatial relationship between the major north-south-trending high strain zones and gold deposits in the area. All economically important deposits in the region are located on the same type and age of structures. The orogenic gold deposits are related to the same structure as the Barsele prospect.
The Avan, Central and Skiråsen zones extend over a strike length of 2.6 km from surface to at least 580 metres depth, within a highly fractured granodiorite. There are two types of mineralization in the Central Zone. Low- to moderate-grade orogenic or mesothermal intrusive-hosted gold is associated with networks of thin tourmaline-quartz and quartz-calcite-arsenopyrite veinlets. High-grade gold-silver-lead-zinc mineralization is hosted by syntectonic quartz-sulphide veins, with grades up to 50 g/t gold or higher. The other style of mineralization at Barsele is referred to as “Skellefte-type mineralization”, found in the Norra Zone. It comprises gold-rich VMS mineralization, similar to the Company’s LaRonde deposit in Quebec.