| Lat / long: | 46.4444, -87.59722 |
| Primary: | Iron |
| Other material: | Aegirine, Ankerite, Apatite, Arsenopyrite, Biotite, Chalcopyrite, Chert, Chlorite, Crocidolite, Cummingtonite, Goethite, Hematite, Ilmenite, Magnetite, Manganite, Martite, Microcline, Monazite, Olivine, Orthoclase, Plagioclase, Pyrite, Pyroxene, Pyrrhotite, Quartz, Riebeckite, Siderite, Stilpnomelane, Tourmaline, Zircon |
| Discovery year: | 1887 |
| Operation type: | Surface |
| Development status: | Producer |
| First production started: | 1907 |
| MRDS | W001394 |
| MAS | 261030003 |
| DEP | 10170458 |
| Reference | {Deposit:: BOYUM, B. H. THE MARQUETTE MINERAL DISTRICT OF MICHIGAN.}{Deposit:: 21ST ANN. INST. ON LAKE SUPERIOR GEOLOGY, ISHPEMING,}{Deposit:: MICHIGAN, APRIL 30 - MAY 4, 1975. NORTHERN MICHIGAN}{Deposit:: UNIVERSITY, ISHPEMING, MICHIGAN, 1975, 59 PP.}{Deposit:: THE CLEVELAND-CLIFFS IRON COMPANY. 1979 FORM 10-K. P. 9.}{Deposit:: PP. 6, 9, 40.}{Deposit:: SKILLINGS, D. N., JR. CLEVELAND-CLIFFS FURTHER EXPANSION OF}{Deposit:: EMPIRE MINE. SKILLING*MIN. REV., V. 65, NO. 40,}{Deposit:: OCTOBER 2, 1976, PP. 10 - 13.}{Deposit:: THOMAS, R. EMPIRE VERGES ON FOURTH EXPANSION SUCCESS.}{Deposit:: ENG. AND MIN. J., V. 180, NO. 9, SEPTEMBER 1979,}{Deposit:: PP. 128 - 133.}{Deposit:: SKILLINGS MINING REVIEW JULY 30, 1988, P18:}{Reserve-Resource:: CLEVELAND-CLIFFS INC. SEC FORM 10-K REPT, 12/31/93, P. 6.} |
| Reporter | Geroyan, Rena |