Commodities
PrimaryIron
Commodity typeM
Deposit
Deposit typeSecondary Enrichment
Deposit sizeS
Ore controlStructurally controlled by faulting in syncline.
Materials
GangueQuartz, Chert, Mica, Garnet, Actinolite
Geology
Host rockIron Formation
AlterationChert to hematite or magnetite in oxidation zones.
Economic & production
Development statusPast Producer
First production1876
Last production1883
Identification
Deposit ID10079313
MRDS IDW028532
Alternate namesFreemont
RegionNA
Data scoreB
Coordinates46.4475, -88.06559
References
SECTION FILES, MICHIGAN GEOLOGICAL SURVEY, REPUBLIC STEEL CO., 1949 ; CLEVELAND - CLIFFS IRON CO., 1965 ; SECTION FILES OF GEOLOGICAL SURVEY DIVISION OF MICHIGAN DEPT. OF NATURAL RESOURCES, LANSING, MICHIGAN.LAKE SUPERIOR IRON ORE ASSOCIATION, 1938 , LAKE SUPERIOR IRON ORES ( 1ST ED. ): CLEVELAND, OHIO, P. 106 .KLASNER, J. S., AND CANNON, W. F., 1976 , GEOLOGIC MAP AND GEOPHYSICAL INTERPRETATION OF THE WITCH LAKE QUADRANGLE, MARQUETTE, IRON AND BARAGA COUNTIES, MICHIGAN: US GEOLOGICAL SURVEY, MISCELLANEOUS INVESTIGATIONS SERIES, MAP I-987 .