Kootenay Arc Zinc District
Margaux’s project straddles the deformation zone at the boundary between sediments deposited off the western margin of ancestral North America and the accreted Quesnel terrane. That deformation zone is known regionally as the Kootenay Arc. It hosts numerous carbonate-hosted lead-zinc deposits, including the past-producing Jersey mine on Margaux’s property, and the Pend Oreille mine in northern Washington, currently in production by Teck.
The Jersey Mine produced 8 million tonnes of lead-zinc mineralization, at a combined grade of 5.8% Pb+Zn. Mining, which ceased in the early 1970’s, was from a near continuous zone of mineralization that extended for 1800 m by 600 m. Mineralization consists of multiple metre-scale horizons of flat-lying stratabound mineralization hosted within lower Cambrian Laib Formation dolomite and limestone, on the upper limb of a large overturned anticline. Historically-mined areas of lead-zinc mineralization ranged up to 30 m in true thickness.
A 43-101 compliant lead-zinc resource exists for the Jersey property, as listed below. Further details are contained in the 2010 43-101 Report.
Low-grade potentially open-pittable Jersey lead-zinc resource (see 2010 NI 43-101 Report):
Higher-grade Jersey lead-zinc resource (see 2010 NI 43-101 Report):
At the Jersey mine, Cretaceous skarn, with local tungsten and gold mineralization, overprints the earlier lead-zinc mineralization. Historically, tungsten was mined from skarn in the footwall to the Jersey lead-zinc horizon.
Margaux added the Jackpot property to its Kootenay Arc Zinc project in late 2016, and completed a 9 hole (1397 m) drill program on the property in 2017. Stratabound, carbonate-hosted lead-zinc mineralization, similar to the Jersey mine, occurs at Jackpot. Unlike Jersey, there has been no historic mining at Jackpot. Numerous high-grade zinc intercepts were intersected in 2017, as shown below.
As with Jersey, the Jackpot also hosts near-surface, lower-grade, potentially open-pittable zinc mineralization, as listed below: