Mine detail: Plymouth Mine

Previously called 'Pilgrim-Mikado-Rhinelander-Atwood Consolidated'

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Location

Lat / long: 46.47028, -89.9576

Resource(M)

Primary: Iron
Ore: Hematite
Gangue: Chert, Pyrite, Martite

Production

Operation type: Surface-Underground
Deposit type: Secondary Enrichment
Production size: Large
Development status: Past Producer
First production started: 1895
Last production ended: 1952

Geology

Host rock:Ironwood Iron-Formation
Host type:Iron Formation
Alteration processes:Chert to hematite in oxidation zones.

References

MRDSW030501
DEP10079772
Reference{Deposit:: LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES (2ND ED.): CLEVELAND, OHIO, P. 58}{Deposit:: CROWELL, BENEDICT, AND MURRAY, C.B., INC., 1917, 1920, 1923, 1927, 1930, THE IRON ORES OF LAKE SUPERIOR (3RD-7TH EDS.): CLEVELAND, OHIO, PP. 231-232, 208-209, 258, 277-278, 250 RESPECTIVELY.}{Deposit:: PRINZ, W.L., HUBBARD, H.A., 1975, PRELIMINARY MAP OF THE WAKEFIELD QUADRANGLE, GOGEBIC COUNTY, MICHIGAN. GEOLOGICAL SURVEY DIVISION OF THE MICHIGAN DEPT. OF NATURAL RESOURCES, LANSING, MICHIGAN.}{Deposit:: JOHNSON, A.M., AND GROTH, E.H.,1998, INVENTORY OF UNDERGROUND MINES, GOGEBIC COUNTY, P. 202-213, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.}
ReporterYeager, Keith (Cannon, W.), Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere)