Location Quebec, Canada
Commodities Primary Gold
Commodities Secondary
Total Current Year Production
Gold; ounces 0
Total Known Current and Historical Production 2008-2018
Gold; ounces 44,400
Total Known Compliant Reserves Proven & Probable
Gold; ounces 0
Total Known Compliant Exclusive Resources Measured & Indicated
Gold; ounces 883,000
Gold; ounces 3,216,000
Total Known Endowment* 2008-2018
Gold; ounces 4,143,400

*Total Known Endowment includes current and historical production and compliant reserves and resources
Data compiled from DigiGeoData database, technical reports and corporate websites
DigiGeoData has compiled this information using best practices and does not warranty the completeness or accuracy.
All data should be checked and verified before use

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Gold was initially discovered in the Urban-Barry Township Area in 1935 along the south shore of Lac Rouleau. This area was explored with trenching which uncovered a 15-metre wide carbonate zone with disseminated sulphides that reportedly ran 2.88 g/t Au over 10.33 m, and 2.19 g/t Au over 10.39 m across two sections corresponding to the actual showing No. 1.

The Urban-Barry greenstone belt, where the Windfall Lake area is located, has a long history of exploration. Multiple agencies and companies have explored the area in the last eight decades. During a reconnaissance geological survey from 1943 through 1947, the Ministère des Ressources Naturelles (MRN) mapped the area, and in 1958, the MRN completed a survey of the area. In the last half of the 1970s and through the 1980s, several companies, notably Shell Canada Ltd. (“Shell Canada”), carried out sporadic exploration activity in the Urban-Barry greenstone belt.

Murgor Resources discovered the Barry Deposit in 1994.

The Alto showing was discovered on Osisko’s Windfall Lake Property by Alto Minerals Inc. and Noront in 1996 through an extensive mapping and trenching program.

A resource estimate for the Windfall Lake deposit was released in June of 2018 followed by a Preliminary Economic Assessment report in August by Osisko Mining.

The Gladiator Gold Deposit (formerly Eastern Extension) was discovered by drilling in 1990’s by Abitex Resources (Xemac Showing).


The Windfall Lake area is in the middle of the two hundred kilometre-long, east-west trending, Urban-Barry Greenstone Belt. This belt forms part of the Northern Volcanic Zone, which contains the Mattagami VMS camp. The belt extends one hundred thirty-five (135) kilometres along strike and has a maximum thickness of twenty (20) kilometers. The belt is bounded to the north, south and west by granitoid batholiths and towards the east by the Grenville geological province.

The Urban-Barry Greenstone Belt hosts the Langlois VMS zinc-silver deposits (~40 km NE of Lebel-sur-Quévillon) and the Barry gold mine.

The Mattagami Lake VMS (volcanic massive sulphides) and the Chibougamau copper-gold camps are 170 and 130 km to the west-northwest and northeast respectively.

Recent work (1991-1998) by several exploration companies has led to the recognition that an extensive band of felsic volcanics and volcaniclastics occurs in the central portion of the belt in Souart, Barry and Urban Townships (including the Lac aux Loutres area).

Numerous gold and a few base metal occurrences lie along a prominent NE trending feature which transects these townships, including the Souart and Murgor gold deposits.

Mapping of the area (1:20,000) appears to show broad, open, folding. In addition, there is little evidence of major, through-going structures. Gold occurrences have been associated with many of these structures. Areas with significant gold mineralization appear to lay in several strike parallel corridors.


In Situ Reserves and Resources



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