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Cigar Lake Mine, Athabasca Basin, Saskatchewan, Canada

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Latitude & Longitude (WGS84): 58° 4' 6'' North , 104° 32' 26'' West
Latitude & Longitude (decimal): 58.0686111111, -104.540555556

The world's second largest uranium deposit, discovered in 1983 and operated by a joint venture of Cameco, COGEMA, TEPCO and Idemitsu. Planned production start in 2007.

The deposit has also been studied as a natural analogue for nuclear waste disposal, with a very concentrated uranium oxide core isolated by a clay mineral halo.

Located about 660 km north of Saskatoon.

Mineral List

26 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Mesoproterozoic - Paleoproterozoic
1000 - 2500 Ma
Collins Mbr of Manitou Falls Fm

Age: Proterozoic (1000 - 2500 Ma)

Stratigraphic Name: Collins Mbr of Manitou Falls Fm of Athabasca Gp

Lithology: Quartzarenite

Reference: Saskatchewan Energy and Resources. Geological atlas of Saskatchewan . [9]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


(1985) Mining Annual Review: 312.

Bruneton, P. (1987) Geology of the Cigar Lake Uranium Deposit (Saskatchewan, Canada) in Economic Minerals of Saskatchewan. Saskatchewan Geological Society.

Percival, J.B., Kodama, H. (1989) Sudoite from Cigar Lake, Saskatchewan. The Canadian Mineralogist: 27: 633-641.

Reyx, J. & Ruhlmann, F. (1993): Metallographic study of different mineral assemblages and chemical characteristics of uranium minerals of the Cigar Lake ore deposit (Saskatchewan, Canada). Canadian Journal of Earth Sciences 30(4), 705-719.

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