Mine detail: Alpha Mine

Previously called 'Alpha Porter'

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Location

Lat / long:

46.04472, -88.38727

Resource(M)

Primary:	Iron
Ore:	Hematite, Goethite
Gangue:	Chert, Pyrite, Siderite, Stilpnomelane, Chlorite, Mica

Production

Operation type:	Underground
Deposit type:	Secondary Enrichment
Production size:	Unknown
Development status:	Past Producer
First production started:	1882
Last production ended:	1903

Geology

Host type:	Iron Formation
Alteration processes:	Chert and siderite to hematite and goethite in oxidation zones.

References

MRDS	W028652
DEP	10106115
Reference	{Deposit:: JAMES, H. L., DUTTON, C. E., PETTIJOHN, F.JAMES, H. L., DUTTON, C. E., PETTIJOHN, F. J., WIER, K. L., 1968, GEOLOGY AND ORE DEPOSITS OF THE IRON RIVER, CRYSTAL FALLS DISTRICT, IRON COUNTY, MICHIGAN. WASHINGTON, U.S. GOVT. PRINTING OFFICE, 1968, PP. 45-56, 88-110.}{Deposit:: LAKE SUPERIOR IRON ORE ASSOCIATION, 1938, LAKE SUPERIOR IRON ORES (1ST ED.): CLEVELAND, OHIO, P. 144.}{Deposit:: JOHNSON, A.M., AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 1-2, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.}
Reporter	Yeager, Keith (Cannon, W.), Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere)