DatoliteSouth Lake Mine, Mass City, Ontonagon Co., Michigan, USA
An underground copper mine consisting of two shafts and one adit near Mass City, MI. The Aztec Mining Co. organized in 1852, reorganized in 1863, sold in 1871, then reorganized in 1880. The mine continued work throughout this period of reorganization, but finally closed in 1882 producing approx. 686,000 lbs. of refined copper. In 1909, mine was sold and reorganized as the South Lake Mining Co. The company worked the mine from 1912 to 1918, when production ceased and the mine was abandoned. The South Lake Mine produced approx. 1 million lbs. of refined copper in just 4 years of operation. Collectors can still find nice copper and copper crystals from the mine piles.
Mineral List
9 entries listed. 7 valid minerals.
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References
Butler, B.S., and Burbank, W.S., 1929, The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pp.
The Copper Country Rock & Mineral Club, 2001, Red Gold and Tarnished Silver, 2nd Ed., 44 pp.
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