Mine detail: Tilden Mine

Previously called ''

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Location

Lat / long:

46.4475, -87.63808

Resource(M)

Primary:	Iron
Ore:	Hematite, Martite, Goethite, Magnetite, Siderite
Gangue:	Chert, Ankerite, Feldspar, Chlorite
Orebody form:	STRATABOUND
Discovery year:	1929

Production

Operation type:	Unknown
Deposit type:	Chemical Sediment: Taconite
Production size:	Large
Development status:	Producer
First production started:	1929

Geology

Host rock:	Negaunee Iron-Formation
Host type:	Iron Formation
Associated rock:	Palmer Gneiss, Compeau Gneiss
Structure:	Marquette syncline - 33 miles - plunging west ; regional trends: E-W

References

MRDS	W001397
DEP	10068372
Reference	{Deposit:: LAKE SUPERIOR IRON ORES, 1938, P. 120.}{Deposit:: LAKE SUPERIOR IRON ORES, 1952, P. 91.}{Deposit:: VAN HISE AND BAYLEY, 1897, U. S. G. S. MONOGRAPH 28.}{Deposit:: JAMES, H. L., 1955, ZONES OF REGIONAL METAMORPHISM. IN THE PRECAMBRIAN OF NORTHERN MICH., G. S. A. BULL., VOL. 66, P. 1455 - 1488}{Deposit:: U.S. BUREAU OF MINES, 1954-1994, MINERALS YEARBOOK [1953-1993]: WASHINGTON, D.C., U. S. GOVERNMENT PRINTING OFFICE, VARIOUS VOLUMES.}{Deposit:: 1971 GEOL MAP G. SIMMONS}{Production:: 8) LAKE SUPERIOR IRON ORES, 1952, P. 91. MINERALS YEARBOOKS FOR THE APPROPRIATE YEARS.}{Reserve-Resource:: MINERALS YEARBOOK, 1989, V. II.}
Reporter	Cannon, Suzanne S., Sutphin, D.M. (Cannon, W.F.), Mason Jr., G.T.