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The latest drill results from Kirkland Lake Gold’s Macassa mine in Ontario include ‘exceptional’ gold grades and suggest potential for resource and reserve additions in three areas of the underground mine.
The 135 drillholes reported in the release are from the south margin of the South Mine Complex (SMC), the Lower SMC area (LSMC), and from the Amalgamated zone.
The producing SMC returned some of the highest gold grades in the release. Highlight intercepts from this area include 14.5 metres of 253.7 g/t gold; and 4.1 metres of 101.1 g/t gold. The miner’s latest interpretation of this part of the mine indicates an intersection of the SMC area with zones surrounding the Amalgamated unit, creating a broad zone of alteration with several high-grade structures, which remain open to the west and at depth.
This year, the mine is expected to churn out around 200,000 oz. of gold.
Notable assay results from the LSMC include 2.4 metres of 103.3 g/t gold; and 2.2 metres of 58.9 g/t gold. These intercepts are from holes targeting existing inferred resources and areas with gaps in drilling around the upper west part of this zone.
Assays from drilling around existing resources within the Amalgamated zone include 8.2 metres of 210.4 g/t gold; and 2 metres of 52.9 g/t gold. According to the release, large areas remain untested along strike and down dip of the existing mineralization within the Amalgamated unit.
“Today’s results are encouraging as they support our view that there is substantial exploration potential in areas where the dip of the SMC approaches the contact with mineralized zones stacked vertically along the Amalgamated Break,” Tony Makuch, Kirkland Lake’s president and CEO, said in a release.
“These are separate areas of gold mineralization coming together, which is very interesting, and what we are seeing are some extremely high-grade intersections.”
Makuch also added that these latest results also suggest new mineralization within the LSMC and along the Amalgamated Break, “further increasing our confidence that there are new mineral reserves to be discovered as we drill along the Break through the Kirkland Lake camp.”
The Macassa mine is in Kirkland Lake, 580 km north of Toronto, and has been in production since 1933. Kirkland Lake Gold started operating the mine in 2002.
Current production is hoisted to surface through the #3 shaft. The miner is working to sink a new shaft at the site, to support higher production levels at lower costs. This project is expected to be completed by the end of 2023. Kirkland Lake Gold is looking to increase production at Macassa to 400,000 oz. per year over the next five to seven years.
This year, the mine is expected to churn out around 200,000 oz. of gold.
(This article first appeared in the Canadian Mining Journal)
