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Indiana Mine, Winona, Greenland Township, Ontonagon Co., Michigan, USA
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Latitude: 46°47'57"N
Longitude: 88°59'57"W
 
 
An underground copper mine consisting of two shafts between Mass City and Twin Lakes, MI. The Indiana Mining Co. was organized in 1862 and worked for three years until 1865. No copper is known to have been produced during this time. The company reorganized in 1909, but no rock was milled and the mine was abandoned. Copper and datolite can be found here. Micro collectors have also faired well on the piles.

Mineral List

Actinolite
Andradite
Calcite
Chalcocite
'Chlorite Group'
Chrysocolla
Copper
Cuprite
Datolite
Domeykite
Epidote
Fluorite
Hematite
'K Feldspar'
Laumontite
Malachite
Natrolite
Prehnite
Pumpellyite-(Mg)
Quartz
Silver
Tenorite


22 entries listed. 20 valid minerals.

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References

Henwood, W.J. (1871): Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1), 385-489.

Butler, B.S., and Burbank, W.S. (1929): The Copper Deposits of Michigan. USGS Prof. Paper 144, 238 pp.

The Copper Country Rock & Mineral Club (2001): Red Gold and Tarnished Silver, 2nd Ed., 44 pp.

Rocks & Min.:58:112.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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