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Hudson Bay Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
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Latitude: 47°24'15"N
Longitude: 79°41'5"W
Not to be confused with the Hudson Bay Mine(aka. Rusty Lake Mine) in Leith Township, Gowganda area.
A silver mine located in Lot 6 Con. VI. Discovered in 1903 and closed in 1920. Produced 6,450,000 oz. Ag and 186,000 lb. Cobalt.

Mineralization is in carbonate(mainly dolomite)veins cutting diabase.

Note* Ferrisymplesite is very rare. On the surface it looks identical to scorodite which is very common. Ferrisymplesite differs from scorodite in that it has a fibrous structure so if you break open one of these brown crusts or masses and it does not have a fibrous structure it is most likely just scorodite. Other than this the only way to tell the two apart is by XRD.

Mineral List

Ferrisymplesite (TL)
Gersdorffite ?
Pararammelsbergite (TL)
var: Smaltite

18 entries listed. 17 valid minerals. 2 type localities (valid minerals).

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WALKER, T.L. & PARSONS, A.L. (1924): The arsenates of cobalt, nickel and iron observed in silver-bearing veins at Cobalt, Ontario. University of Toronto, Geology Series, Contributions to Canadian Mineralogy 17, 13-17.
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.
Sabina, Ann P., 2000. Rocks and Minerals for the Collector: Cobalt-Belleterre-Timmins, Ontario and Quebec, GSC. Miscellaneous Report 57, 266 p.
Sergiades, O.A. (1968) Silver Cobalt Calcite Vein Deposits of Ontario. Ontario Dept. of Mines, MRC No.10.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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