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Pennsylvania Copper Mine, Delaware, Keweenaw Co., Michigan, USA

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Latitude & Longitude (WGS84): 47° 25' 30'' North , 88° 5' 3'' West
Latitude & Longitude (decimal): 47.425, -88.0841666667
Other regions containing this locality:Keweenaw Peninsula, Michigan, USA
North America


Commodities (Major) - Copper
Development Status: Past Producer

An underground copper mine consisting of three shafts located near Delaware. The Pennsylvania Mining Company was organized in 1861 after splitting off from the Northwest Mining Company. The company began work on the Pennsylvania Fissure which consisted of three separate veins crossing their property. Shafts were sunk on each vein after rich copper deposits were discovered. The mine had a relatively short life, partly because company management spent their entire capital on surface improvements instead of mining, and the mine closed in 1866. Most of the piles were removed in the 1990’s for road improvements. What is left can be a challenge to find, but once found, copper and datolite can be recovered.

Mineral List


1 valid mineral.

This page contains all mineral locality references listed on mindat.org. 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 mindat.org 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.

References

IRVING, R D, 1883, USGS MONOGRAPH 5, MAP XVII.

DeGood, L., 2011, Michigan Copper Mining Stocks and Bonds. 401 pp.

Kaminski-Hamka, T., 2011, The Copper Mines of Keweenaw County, Michigan. Copperlady Press, 150 pp.

Clarke, D.H., 1975, Copper Mines of Keweenaw; Northwest Copper Mining Association, no. 9, 28 pp.

Mineral and/or Locality  
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