Mine detail: Fitch Mine

Previously called 'Merryweather'

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Location

Lat / long: 46.45861, -87.7478

Resource(M)

Primary: Iron
Ore: Hematite, Magnetite, Goethite
Gangue: Quartz
Orebody form: STRATABOUND
Discovery year: 1844

Production

Operation type: Unknown
Deposit type: Bedded, Chemical Sediment
Production size: Small
Development status: Past Producer
Production years: SHIPPED ORE 1890-1892; CLOSED IN 1893, BUT SHIPPED 174 LT IN 1895SHIPPED ORE 1890-1892; CLOSED IN 1893, BUT SHIPPED 174 LT IN 1895.
First production started: 1890
Last production ended: 1895

Geology

Host rock:Negaunee Iron-Formation
Host type:Iron Formation
Structure:Westward plunging synclinorium open at western end; regional trends are eas
Alteration processes:Some magnetite formed by replacement of ferrous iron minerals during diagenesis and most iron silicate probably formed by metamorphism of an early silicate mineral.

References

MRDSW062083
DEP10082733
Reference{Deposit:: JAMES, H. L., 1955, ZONES REG. METAMORPHISM. IN N. MICHIGAN.: GEOLOGICAL SOCIETY OF AMERICAN BULLETIN, V. 66, P. 1455-1488.}{Deposit:: THE LAKE SUPERIOR IRON ASSOC., 1938, LAKE SUPERIOR IRON ORES.}{Deposit:: LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES: CLEVELAND, OHIO, 2D ED., 334 P.}{Deposit:: GRATON-SALES VOL. A. I. M. E., THE MARQUETTE DISTRICT: ORE DEPOSITS OF THE U. S., 1933-1967, P. 508-517.}{Deposit:: LAURA, D.K., 1981, THE EARLY PROTEROZOIC PRE-IRON FORMATION, MENOMINEE GROUP SILICICLASTIC SEDIMENTS OF THE SOUTHERN LAKE SUPERIOR REGION; EVIDENCE FOR SEDIMENTATION IN PLATFORM AND BASINAL SETTINGS: JOURNAL OF SEDIMENTARY PETROLOGY, V. 51, NO. 2, P. 397-414.}{Deposit:: SIMS, P.K., 1990, GEOLOGIC MAP OF THE PRECAMBRIAN ROCKS OF IRON MOUNTAIN AND ESCANABA 1 DEGREE X 2 DEGREES QUADRANGLES, NORTHEASTERN WISCONSIN AND NORTHWESTERN MICHIGAN: U.S. GEOLOGICAL SURVEY MISCELLANEOUS INVESTIGATION SERIES, I-2056.}{Deposit:: BOYUM, B.H. AND REED, R.C., 1988, MARQUETTE MINERAL DISTRICT OF MICHIGAN, MINING HISTORY AND GEOLOGY, IN SCHULZ, K.J., 34TH ANNUAL INSTITUTE ON LAKE SUPERIOR GEOLOGY FIELD TRIP GUIDEBOOKS, V. 34, PART 2, P. B-1-B-15.}{Deposit:: BOYUM, B.H., 1988, THE ORIGIN AND EXTENT OF THE HARD AND SOFT IRON ORES OF THE MARQUETTE RANGE, MICHIGAN, IN KISVARSANYI, GEZA, AND GRANT, S.K., NORTH AMERICAN CONFERENCE ON TECTONIC CONTROL OF ORE DEPOSITS AND THE VERTICAL AND HORIZONTAL EXTENT OF ORE SYSTEMS, PROCEEDINGS VOLUME: UNIVERSITY OF MISSOURI, ROLLA, P. 301-311.}{Deposit:: MOST ALL OF THIS DISTRICT HAS BEEN MAPPED AT 7 1/2 MINUTE QUADRANGLE SIZE. TOO MANY GEOLOGISTS HAVE BEEN INVOLVED TO MENTION INDIVIDUALLY. GAIR, J.E., 1975, BEDROCK GEOLOGY AND ORE DEPOSITS OF THE PALMER QUADRANGLE, MARQUETTE COUNTY, MICHIGAN: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 769, 159 P.}{Deposit:: JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, MARQUETTE COUNTY, P. 158-159, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.}{Production:: LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES: CLEVELAND, OHIO, 2D ED., 75-92 P.}
ReporterSutphin, D.M. (Cannon, W.F.), Mason Jr., G.T., Anderson, Arlene (M. Gere)