Latitude: 47°11'10"N
Longitude: 88°28'29"W
Host Rock Unit: Portage Lake Volcanics.
An underground copper mine consisting of one shaft located northwest of Hancock. The Oneco Copper Mining Company was organized in 1899 and began operations on the former site of the Hungarian Mine which was started in 1862. The Hungarian sunk an exploratory shaft 100 feet but abandoned it for unknown reasons. Once work on the site began as the Oneco, and new, deeper shaft was started in 1899. In one year, the shaft had reached a depth of 900 feet. The shafts were sunk on an unnamed amygdaloid lode. The company operated until 1913 when it closed for good; a victim of the great strike that gripped the area. Some piles still remain and minerals such as copper and kinoite included quartz can be found.
References
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.
CORNWALL, H.R., AND WRIGHT, J.C., 1956, GEOLOGIC MAP OF THE LAURIUM QUADRANGLE, MICHIGAN: USGS MAP MF-47, SCALE 1:24000
DeGood, L., 2011, Michigan Copper Mining Stocks and Bonds. 401 pp.
Kaminski-Hamka, T., 2011, Copper Mines of Houghton County, Michigan. Copperlady Press, 120 pp.
Mineral List
6 entries listed. 5 valid minerals.
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