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Keeley-Frontier Mine (Canadian Keeley; Frontier Mine; Keeley Mine), South Lorrain Township, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada

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Latitude & Longitude (WGS84): 47° 11' 57'' North , 79° 30' 20'' West
Latitude & Longitude (decimal): 47.19917,-79.50556

Two mines on the opposite end of the same vein system that connected underground. The Keeley being the oldest discovered in 1907. The Frontier mine was developed in 1921 and connected to the Keely Mine on the Keeley 6th level in 1962. The mines extend to a depth of 1455ft. They were shut down in 1965. The Woods vein is famous for having the deepest oxidation zone and greatest abundance of secondary enrichment minerals of all the mines in the region.
Total production for the two mines was 19,200,000 oz. of Ag; 3,300,000 lbs. of Co; 27,000 lbs. of Ni; and 10,000 lbs Cu.

Great caution must be exercised when collecting in the area because of many unmarked open holes and uncapped shafts.

Mineral List

Mineral list contains entries from the region specified including sub-localities

49 valid minerals. 4 (TL) - type locality of valid minerals. 1 erroneous literature entry.

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

Neoarchean - Mesoarchean
2500 - 3200 Ma
Mafic to intermediate metavolcanic rocks

Age: Archean (2500 - 3200 Ma)

Comments: Superior Province

Lithology: Basaltic and andesitic flows, tuffs and breccias, chert, iron formation, minor metasedimentary and intrusive rocks, related migmatites

Reference: Ontario Geological Survey. 1:250 000 scale bedrock geology of Ontario. ISBN 978-1-4435-5705-4. Miscellaneous Release–Data 126 - Revision 1. [1]

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

Localities in this Region

  • Ontario
    • Timiskaming District
      • Cobalt-Gowganda region
        • South Lorrain Township
          • Keeley-Frontier Mine (Canadian Keeley; Frontier Mine; Keeley Mine)

This page contains all mineral locality references listed on 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 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.


WALKER, T.L. & PARSONS, A.L. (1921): Rammelsbergite from Cobalt. University of Toronto Studies, Contributions to Canadian Mineralogy 12, 27-31.

PEACOCK, M.A. & MICHENER, C.E. (1939): On rammelsbergite from Ontario. University of Toronto Studies, Contributions to Canadian Mineralogy 42, 95-112.

PEACOCK, M.A. (1939): Rammelsbergite and pararammelsbergite, distinct orthorhombic forms of NiAs2. American Mineralogist 24, 10-11 (abstr.).

PEACOCK, M.A. & DADSON, A.S. (1940): On rammelsbergite and pararammelsbergite: distinct forms of nickel diarsenide. American Mineralogist 25, 561-577.

Sergiades, A.O. (1968) Silver Cobalt Calcite Vein Deposits of Ontario, Ontario Dept. of Mines, MRC No.10,

FLEET, M.E. (1972): The crystal structure of pararammelsbergite NiAs2. Am. Mineral. 57, 1-9.

Anderson, V. (1982) Microminerals. Mineralogical Record 13, 109.

Mineralogical Record (1990): 21: 104.

Sabina, Ann P., 2000. Rocks and Minerals for the Collector: Cobalt-Belleterre-Timmins, Ontario and Quebec, GSC. Miscellaneous Report 57, 266 p.

Sejkora, J., F.C. Hawthorne, M.A. Cooper, J.D. Grice, J. Vajdak and J.L. Jambor (2009), Burgessite, a new arsenate mineral species from the Keeley Mine, South Lorrain Township, Ontario, Canada, Canadian Mineralogist 47, 159-164(2009)

Cooper, M.A. & F.C. Hawthorne (2009): The crystal structure of burgessite, and its relation to erythrite. Canadian Mineralogist, 47, 165-172

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