Mine detail: Forbes Mine

Previously called ''

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Location

Lat / long:

46.11778, -88.65061

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:	1912
Last production ended:	1946

Geology

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

References

MRDS	W028929
DEP	10079402
Reference	{Deposit:: 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, 1952, LAKE SUPERIOR IRON ORES (2ND ED.): CLEVELAND, OHIO. P. 114.}{Deposit:: CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1917, 1920, 1927, THE IRON ORES OF LAKE SUPERIOR (3RD, 4TH, 6TH EDS.): CLEVELAND, OHIO. PP. 252-253, 229, 299-300 RESPECTIVLY.}{Deposit:: JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 152-153, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.}
Reporter	Yeager, Keith (Cannon, W.), Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere)