Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeSecondary Enrichment
Deposit sizeS
Ore controlNear stratigraphic top of iron-formation
Materials
Ore mineralsHematite, Grunerite, Siderite
GangueJasper, Magnetite, Chert, Garnet, Siderite, Hornblende, Actinolite, Mica, Chlorite
Geology
Host rockIron Formation · Negaunee Iron-Formation
AlterationChert replaced by compact or specular hematite and magnetite
Economic & production
Development statusPast Producer
First production1873
Last production1886
Identification
Deposit ID10106104
MRDS IDW028539
Alternate namesSpurr Mountain Mine
RegionNA
Data scoreB
Coordinates46.54083, -88.13254
References
KLASNER, J. S., AND CANNON, W. F., 1978 , BEDROCK GEOLOGY MAP OF THE SOUTHERN PART OF THE MICHIGAMME AND THREE LAKES QUADRANGLES, MARQUETTE AND BARAGA COUNTIES, MICHIGAN, USGS MAP 1 - 1078 .LAKE SUPERIOR IRON ORE ASSOCIATION, 1938 , LAKE SUPERIOR IRON ORES ( 1ST ED. ): CLEVELAND, OHIO, P. 119 .HANNA, T. A., 1902 , STATE OF MICHIGAN MINES AND MINERAL STATISTICS , MARQUETTE, MICHIGAN, P. 78 .SECTION FILES, MICHIGAN GEOLOGICAL SURVEY, CLEVELAND-CLIFFS IRON CO., 1950 , SECTION FILES OF THE GEOLOGICAL SURVEY DIVISION OF MICHIGAN DEPT. OF NATURAL RESOURCES.JOHNSON, AL, 1998, INVENTORY OF UNDERGROUND MINES, BARAGA COUNTY, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.