Mine detail: Mansfield Mine

Previously called ''

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Location

Lat / long:

46.11556, -88.21921

Resource(M)

Primary:	Iron
Ore:	Hematite, Grunerite, Limonite
Gangue:	Mica, Chlorite, Pyrite, Rutile, Stilpnomelane, Siderite

Production

Operation type:	Underground
Deposit type:	Secondary Enrichment
Production size:	Unknown
Development status:	Past Producer
First production started:	1890
Last production ended:	1913

Geology

Host type:	Iron Formation
Alteration processes:	Leaching of silica along with oxidation and iron enrichment in weathering zones.

References

MRDS	W028658
DEP	10106116
Reference	{Deposit:: BAYLEY, R. W., 1959, GEOLOGY OF THE LAKE MARY QUADRANGLE,IRON COUNTY, MICHIGAN. WASHINGTON, U.S. GOVT. PRINTING OFFICE, 1959 PP. 40-44.}{Deposit:: LAKE SUPERIOR IRON ORE ASSOCIATION, 1938, LAKE SUPERIOR IRON ORES (1ST ED.): CLEVELAND, OHIO. P. 158.}{Deposit:: CROWELL, BENEDICT, AND MURRAY, C. B., INC, 1911, 1914, THE IRON ORES OF LAKE SUPERIOR (1ST, 2ND EDS.): CLEVELAND, OHIO. PP. 121, 205 RESPECTIVELY.}{Deposit:: SECTION FILES, MICHIGAN GEOLOGICAL SURVEY, OLIVER IRON MINING CO., SECTION FILES OF THE GEOLOGICAL SURVEY DIVISION OF THE MICHIGAN DEPARTMENT OF NATURAL RESOURCES, LANSING, MICHIGAN.}{Deposit:: JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 247-250, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.}
Reporter	Yeager, Keith (Cannon, W.), Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere)