|Latitude & Longitude (WGS84):||45° 26' 27'' North , 91° 7' 0'' West|
|Latitude & Longitude (decimal):||45.44111,-91.11667|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
Mined by Kennecott Copper between 1993 to 1997. The 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). The 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.
67 valid minerals.
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
1600 - 2500 Ma
|Mafic to felsic metavolcanic rocks|
Age: Proterozoic (1600 - 2500 Ma)
Comments: Pembine-Wausau terrane
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.