Description
Cleveland-Cliffs Iron Co.
Commodities
TertiaryCopper, Nickel
Commodity typeM
Deposit
Model9: Duluth Cu-Ni-PGE
Deposit sizeU
WorkingsSurface
Orebody formTABULAR
Ore controlSulfides Segregated In Basal Troctolites Sub-Parallel To Lower Contact.
Materials
Ore mineralsBornite, Chalcopyrite
GangueBiotite, Olivine, Plagioclase, Pyroxene, Pyrrhotite
Geology
Host rockTroctolite · Poplar Lake Intrusion
Economic & production
Development statusOccurrence
Discovery year1966
Identification
Deposit ID10072946
MRDS IDW018677
RegionNA
Data scoreB
Coordinates48.08611, -90.84736
References
JOHNSON, R.G., 1970, ECONOMIC GEOLOGY OF A PORTION OF THE DULUTH COMPLEX, UNIV. OF IOWA PHD THESIS.WEIBLEN, AND MOREY, 1975, THE DULUTH COMPLEX--AN INTEGRATED SUMMARY; PROC. A.I.M.E.1969 GEOLMAP MINN. GEOLOGICAL SURVEY OPEN FILE MA