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National Mine, Rockland, Ontonagon Co., Michigan, USA

Latitude: 46°44'15"N
Longitude: 89°10'45"W
An underground copper mine consisting of seven shafts located just south of Rockland, MI. The National Mine was chartered in 1848 and worked until 1871. The mine was worked on tribute until 1893, when the mine was closed for good. The National Mine produced approx. 11.6 million lbs. of refined copper. The mine piles today produce quality copper and silver crystals, copper chisel chips, and malachite.

Mineral List

Azurite
Baryte
Calcite
'Chlorite Group'
Chrysocolla
Copper
Cuprite
Dolomite
Epidote
'K Feldspar'
Malachite
Natrolite
Pumpellyite-(Mg)
Quartz
var: Chalcedony
Silver


16 entries listed. 13 valid minerals.

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References

Rocks & Min.: 58: 112

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.

Clarke, D.H., 1978, Copper Mines of keweenaw: Minesota Mining Company, No. 11, 28 pp.

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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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