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High-grade showings around historic Atikokan gold mine

Nuinsco Resources finding multiple gold occurrences at Sunbeam project
Nuinsco Resources Sunbeam drilling
Drilling at Nuinsco Resources' Sunbeam property, near Atikokan. (Company Twitter photo)

One of Ontario's earliest gold camps in northwestern Ontario is showing signs of high-grade life.

Nuinsco Resources has identified 10 gold occurrences on its property near the town of Atikokan. Recent drilling shows the presence of gold beneath the former Sunbeam Mine, an historic underground operation from the turn of the last century.

The Toronto explorer's Sunbeam property is 27 kilometres northeast of Atikokan and is 12 kilometres southwest of Agnico Eagle's dormant Hammond Reef gold deposit, a potential 4.5-million-ounce producer. Atikokan is 200 kilometres west of Thunder Bay.

Nuinsco optioned Sunbeam in 2017.

The Sunbeam Mine was a high-grade underground operation that ran from 1898 to 1905. Production records from Sunbeam are limited and the property has seen sporadic exploration between 1981 and 2012.

But Nuinsco said it's finding plenty of encouraging signs that high-grade gold does exist after combing through old pits, shafts and from the limited drilling done in the past. Grab samples collected last year from the mine's waste rock pile returned assays as high as 122 grams per tonne.

Nuinsco said there are large untested gold trends that extend across the property.

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“The Sunbeam Gold Property offers a great exploration opportunity for Nuinsco, especially given the recent advances in the price of gold,” said Nuinsco CEO Paul Jones in a July 27 news release.

“The abundance of high-grade gold mineralized occurrences will be systematically evaluated. In addition to the broad strike extent of gold mineralized structures at surface and known gold occurrences, the gold mineralization and host-structure are now known to extend below the depth-extent of historic work. This presents an extensive target domain.”

Atikokan is known for the two massive iron ore pits that were mined in the middle of the Second World War and operated until the late 1970s. But gold was discovered in the Atikokan and Mine Centre area in the late 1800s, which led to one of Ontario's first gold camps.

The Ontario Geological Survey identified more than 50 occurrences, prospects and past producers of gold since the 1800s with a 50-kilometre radius of Atikokan.

Total production during that period amounted to approximately 52,000 ounces of gold and 174,000 ounces of silver.

But at the Sunbeam Mine, there are no records of production between 1899 and 1903. It was recorded that 1,000 ounces of gold were recovered in 1904. A 1903 mine plan shows an average grade of 13 grams per tonne of gold.

Nuinsco said it has identified some targets related to the mine from a geotechnical survey done in 2018 and plans to test other parts of the property's mineralized trends. Diamond drill targets have also been identified and await testing, the company said.

Besides Sunbeam, Nuinsco is also exploring at its Prairie Lake rare-earths metal project near Terrace Bay on Lake Superior.