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Flambeau Mine, Ladysmith, Rusk Co., Wisconsin, USA

This page kindly sponsored by Geoprime Minerals/Casey Jones
Latitude & Longitude (WGS84): 45° 26' 28'' North , 91° 7' 0'' West
Latitude & Longitude (decimal): 45.4411111111, -91.1166666667

Mined by Kennecott Copper between 1993 to 1997. Site has since been completely restored. This is the only mining of massive sulfides in Wisconsin (other deposits have been drilled, but there are no plans to mine them). Ore was rich enough to ship directly to the smelters without having to be concentrated.

The deposit was an exhalative massive sulfide deposit deformed during the 1.80 -1.85 billion year old Penokean orogeny. It was subjected to significant oxidation and supergene enrichment producing a zoned cap of, from the surface downward, gossan, chalcocite, bornite and chalcopyrite. Many specimens, especially clusters of chalcocite crystals with an iridescent bornite patina, were preserved by contract collector Casey Jones. Other notable minerals found were malachite, azurite, cuprite variety chalcotrichite, kolbeckite and other phosphates.

Mineral List

62 valid minerals.

The above list 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.


May, E. (1977) Flambeau - A Precambrian supergene enriched massive sulfide deposit: Geoscience Wisconsin: 1: 1-26

Rosemeyer, T. (1995): Microminerals of the Flambeau Mine, Ladysmith, Rusk County, Wisconsin. Rocks and Minerals, 70, 335-339.

LaBerge, G. L., Editor (1996), Volcanogenic massive sulfide deposits of northern Wisconsin: A commemorative volume: Institute on Lake Superior Geology Proceedings, 42nd Annual Meeting, Cable, Wisconsin: volume 42, part 2, 179 p.

Rosemeyer, T. (1997) In Memoriam: The Flambeau Mine, Rusk County, Wisconsin June 1993-March 1997: Rocks and Minerals: 72(5): 344-347

Jones, C.L. and Laberge, G.L. (1997). Chalcocite from the Flambeau mine, Ladysmith, Wisconsin (abstract) Mineralogical Record, 28(1),pp:52-53.

Cordua, W. (1998), Wisconsin Mineral Locality Index: Rocks & Minerals 73 (11-12): 378-399.

Jones, C., Jones, J.K. and LaBerge, G. (1999). The Flambeau Mine, Ladysmith, Wisconsin. Mineralogical Record, 30 (2), 107-131.

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