Mine detail: Birch Lake

Previously called ''

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Location

Lat / long: 47.75027, -91.81794

Resource(M)

Primary: Copper, Nickel, Platinum, Palladium
Secondary: Cobalt, Titanium, Rhodium
Tertiary: Gold, Silver
Ore: Bornite, Chalcopyrite, Pentlandite, Pyrite, Pyrrhotite
Gangue: Apatite, Biotite, Mica, Olivine, Plagioclase, Pyroxene
Orebody form: TABULAR, DISSEMINATED
Discovery year: 1967

Production

Operation type: Unknown
Production size: None
Development status: Prospect

Geology

Host rock:South Kawishiwi Intrusion
Host type:Troctolite
Associated rock:Virginia Formation, Giants Ridge Batholith, Biwabik Iron Formation
Associated type:Argillite,Granite,Iron Formation
Structure:Several Ne-Trending Normal Faults Parallel The Midcontinent Rift System Near The Margin. These Faults Formed During The Opening Of The Rift And Controlled Emplacement Of The Troctolitic And Late Intrusions.
Alteration processes:Ultramafic Rocks Have Been Serpentinized

References

MRDSW018675
DEP10072944
Reference{Commodity:: BONNICHSEN, BILL, 1974, COPPER AND NICKEL RESOURCES IN THE DULUTH COMPLEX, NORTHEASTERN MINNESOTA: MINNESOTA GEOLOGICAL SURVEY INFORMATION CIRCULAR 10, 24 P}{Deposit:: PAGE, N. J, 1986, DESCRIPTIVE MODEL OF DULUTH CU-NI-PGE, IN COX, D.P. AND SINGER, D.A., MINERAL DEPOSIT MODELS: U.S. GEOLOGICAL SURVEY BULLETIN 1693, P. 16.}{Geology:: MORTON, PENELOPE, AND HAUCK, S.A., 1987, PGE, AU AND AG CONTENTS OF CU-NI SULFIDES FOUND AT THE BASE OF THE DULUTH COMPLEX, NORTHEASTERN MINNESOTA: NATURAL RESOURCES RESEARCH INSTITUTE TECHNICAL REPORT NRRI/GMIN-TR-87-04, 81 P.}{Geology:: DAHLBERG, E.H., 1989, LITHOCHEMISTRY OF THE PLATINIFEROUS OXIDE-ULTRAMAFIC ASSOCIATION OF THE BASAL ZONE DULUTH COMPLEX, BIRCH LAKE-DUVAL AREA, IN MOREY, G.B., ED., WORKSHOP ON THE APPLICABILITY OF GOLD AND PLATINUM-GROUP-ELEMENT MODELS IN MINNESOTA: MINNESOTA GEOLOGICAL SURVEY INFORMATION CIRCULAR 30, P. 49-50.}{Geology:: DAHLBERG, E.H., AND GLADEN, 1987, COMPARISON OF OXIDE CUMULATES IN THE BIRCH LAKE AREA OF THE DULUTH COMPLEX WITH PGE DEPOSITS [ABS.]: GEOLOGICAL SOCIETY OF AMERICA ABSTRACTS WITH PROGRAMS, V. 19, NO. 4, P. 195.}{Geology:: HAUCK, S.A., SEVERSON, M.J., ZANKO, L., BARNES, S-J., MORTON, P., ALMINAS, H., FOORD, E.E., AND DAHLBERG, E.H., 1997, AN OVERVIEW OF THE GEOLOGY AND OXIDE, SULFIDE AND PLATINUM-GROUP ELEMENT MINERALIZATION ALONG THE WESTERN AND NORTHERN CONTACTS OF THE DULUTH COMPLEX: GEOLOGICAL SOCIETY OF AMERICA SPECIAL PAPER, V. 312, PP. 137-185.}{Geology:: FOOSE, M.P., 1985, THE SETTING AND DISTRIBUTION OF COPPER-NICKEL SULFIDES IN THE SOUTH KAWISHIWI INTRUSION, DULUTH COMPLEX, MINNESTOA, IN KRAFT, KATHLEEN, ED., U.S. GEOLOGICAL SURVEY RESEARCH ON MINERAL RESOURCES--1985, PROGRAM AND ABSTRACTS: U.S. GEOLOGICAL SURVEY CIRCULAR 949, P. 12-13.}{Geology:: HAUCK, S.A., SEVERSON, M.J., ALAPIETI, T., KAUKONEN, R., RIPLEY, E., AND GOLDBERG, S., 1995, ORIGIN OF PGE-CR MINERALIZATION, BIRCH LAKE, SOUTH KAWISHIWI INTRUSION, DULUTH COMPLEX, MINNESOTA, GEOCHEMICAL AND ISOTOPIC DATA, IN PETROLOGY AND METALLOGENY OF VOLCANIC AND INTRUSIVE ROCKS OF THE MIDCONTINENT RIFT SYSTEM, INTERNATIONAL FIELD CONFERENCE AND SYMPOSIUM, PROCEEDINGS: INTERNATIONAL GEOLOGICAL CORRELATION PROGRAM, UNIVERSITY OF MINNESOTA DULUTH, CONTINUING EDUCATION AND EXTENSION, P. 63-64.}
ReporterWoodruff, L.G., no name, Peterson, J.A., Sutphin, D.M. (Cannon, W.F.), Mason Jr., G.T., Woodruff, Laurel G.