Mine detail: Spruce Road deposit

Previously called 'Spruce Open Pit IncoSpruce MineInco ProspectEly SpruceEly Nickel Copper '

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Location

Lat / long: 47.82972, -91.681

Resource(M)

Primary: Copper, Nickel, Platinum, Palladium
Secondary: Cobalt, Gold, Silver
Tertiary: PGE
Ore: Bornite, Bravoite, Chalcocite, Copper, Cuprite, Digenite, Galena, Magnetite, Pentlandite, Pyrite, Sphalerite, Tenorite, Troilite
Gangue: Olivine, Plagioclase, Pyroxene
Orebody form: TABULAR - LENS
Other material: Pyrrhotite
Discovery year: 1955

Production

Operation type: Unknown
Production size: Unknown
Development status: Prospect

Geology

Host rock:Duluth Complex, South Kawishiwi Intrusion
Host type:Mafic Intrusive Rock,Troctolite
Associated rock:Giants Range Batholith, Biwabik Formation, Virginia Formation
Associated type:Granite,Iron Formation,Argillite
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.

References

MRDSM046425
DEP10038935
Reference{Commodity:: BOUCHER, M. L., 1975, COPPER - NICKEL MINERALIZATION IN DRILL CORE. U.S.BUREAU OF MINES REPORT OF INVESTIGATION 8084, 55 P.}{Commodity:: BONNICHSEN, BILL., 1974, COPPER AND NICKEL RESOURCES IN THE DULUTH COMPLEX; MINNESOTA GEOLOGICAL SURVEY I.C.10.}{Commodity:: CORNWALL, H.R., 1966, NICKEL DEPOSITS OF NORTH AMERICA, U.SS. GEOLOGICAL SURVEY BULLETIN 1223, P. 43-44.}{Commodity:: SCHWARTZ, G.M., AND DAVIDSON, D.M., 1952, MINING ENG., VOL. 4, NO. 7, P. 699-702.}{Commodity:: CORNWALL, H.R., 1973, NICKEL (CHAPTER IN): U.S.GEOLOGICAL SURVEY PROFESSIONAL PAPER 820, P.440.}{Deposit:: BONNICHSEN AND TYSON, 1975, FIELD GUIDEBOOK FOR THE ELY HOYT LAKES REGION OF THE DULUTH COMPLEX, MINNESOTA, PENROSE CONFERENCE, SEPT. 1975}{Geology:: 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:: 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.}{Reserve-Resource:: MANIFILE, THE UNIVERSITY OF MANITOBA FILE OF NONFERROUS METAL DEPOSITS OF THE WORLD, 1973, UNIVERSITY OF MANITOBA,WINNIPEG, MANITOBA, INDEX NO. A17202002.}{Reserve-Resource:: METAL WEEK-METALS SOURCEBOOK, 3/11/74, ITEM #B1834.}{Reserve-Resource:: SKINNER, WALTER R., 1973, MINING INTERNATIONAL YEARBOOK: THE FINANCIAL TIMES, LONDON, 1973, P.316.}{Reserve-Resource:: INTERNATIONAL NICKEL COMPANY OF CANADA, 1972 ANNUAL REPORT.}
ReporterWoodruff, L.G., Page, Norman, Sutphin, D.M., Mason, Jr., G.T., Coury, Anny, Shaffer, Glenn L., Woodruff, Laurel G.