| Lat / long: | 46.45611, -87.60558 |
| Primary: | Iron |
| Ore: | Magnetite |
| Gangue: | Chert, Biotite, Quartz, Chlorite, Olivine, Pyrite |
| Orebody form: | TABULAR: MASSIVE |
| Operation type: | Unknown |
| Deposit type: | Chemical Sedimentary: Replacement |
| Production size: | Large |
| Development status: | Producer |
| First production started: | 1907 |
| Host rock: | Negaunee Iron-Formation |
| Host type: | Iron Formation |
| Associated rock: | Siamo Slate, Ajibik Quartzite |
| Structure: | Marquette syncline, about 33 miles long and open at the western end. Begin, Monoclinal fold dipping 35 deg. nw. |
| Alteration processes: | In chlorite zone, near biotite isograd. |
| MRDS | W001394 |
| DEP | 10107262 |
| Reference | {Deposit:: JAMES, H. L., 1955, ZONES OF REG. METAMORPHISM. IN THE PRECAMBRIAN OF NO. MICH. G. S. A. BULL., VOL. 66, P. 1455 - 1488.}{Deposit:: LAKE SUPERIOR IRON ORE ASSOC., 1938, LAKE SUPERIOR IRON ORES.}{Deposit:: LAKE SUPERIOR IRON ORE ASSOC., 1952, LAKE SUPERIOR IRON ORES.}{Deposit:: VAN HISE AND BAYLEY, 1897, U. S. G. S. MONOGRAPH 28.}{Deposit:: U.S. BUREAU OF MINES, 1954-1994, MINERALS YEARBOOK [1953-1993]: WASHINGTON, D.C., U. S. GOVERNMENT PRINTING OFFICE,}{Deposit:: 1969 GEOL MAP J. GAIR}{Production:: LAKE SUPERIOR IRON ORES 1938 AND 1952, P. 106; P. 80. MINERALS YEARBOOKS FOR APPROPRIATE YEARS.}{Reserve-Resource:: MINERALS YEARBOOK 1989, V. II.} |
| Reporter | Cannon, Suzanne S., Sutphin, D.M. (Cannon, W.F.), Mason Jr., G.T. |