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North Lake Mine, Ontonagon Co., Michigan, USA

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Latitude & Longitude (WGS84): 46° 47' 5'' North , 89° 1' 24'' West
Latitude & Longitude (decimal): 46.7847222222, -89.0233333333
 
Commodities (Major) - Copper
Deposit Type: Secondary Enrichment
Development Status: Past Producer
Deposit Model: 96: Native Cu
Host Rock Unit: Portage Lake Volcanics
Host Rock: Basalt

The North Lake Mine was operated by the Lake Mining Company which organized in 1908. The mine cut into the Butler Lode on the 800 foot crosscut and was followed by a drift 30 feet in length. The crosscut was repoted to contain good amounts of copper; however, no ore was shipped from this mine. The mine continued exploratory work into the 1920's. Datolite and copper can be found on the rock piles that remain.

Mineral List



8 entries listed. 6 valid minerals.

The above list 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

REF:Deposit:: COPPER RANGE CO., UNPUBLISHED, 1968, BEDROCK GEOLOGY MAP OF THE GREENLAND (SE 1/4 QUADRANGLE, ONTONAGON COUNTY, MICHIGAN. GEOLOGY MAPPED AND COMPILED BY COPPER RANGE EXPLORATION CO., INC., AND BY H. HUBBARD (U.S.G.S.)

Hamka, T., 2011, The Copper Mines of Ontonagon County, Michigan. Copperlady Press. 154 pp.

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

Butler, B.S., and Burbank, W.S., 1929, The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pp.

Mineral and/or Locality  
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