Commodities
PrimaryNickel, Copper, Cobalt
Commodity typeM
Deposit
Deposit sizeN
Orebody formPOD/LENS
Ore controlConcentrated In Sills.
Materials
Ore mineralsBravoite, Chalcopyrite, Pentlandite, Pyrite, Pyrrhotite, Sphalerite
Geology
Host rockGreenstone,Schist,Gneiss,Limestone · Schist, Greenstone, Gneiss, Recrystallized Limestone;Tuffaceous Slate & Conglomerate;Valdez Formation Slate & Graywacke;Unconsolidated Glacial, Fluvial & Residual Materia
Associated rockDiorite,Diabase,Peridotite,Pyroxenite · Diorite, Diabase, Peridotite, Pyroxenite
StructureReg.Trends: Slightly North Of West With Local Variations Up To 40 Deg., Several Eastward Trending Sill-Like Bodies Intrude Carboniferous Limestones.
Tectonic settingEugeosynclinal Deposits Of Later Mesozoic Age.
AlterationNickel-Bearing Sulphides Occur In Highly Altered Coarse-Grained Peridotite
Economic & production
Development statusOccurrence
Discovery year1907
Identification
Deposit ID10067539
MRDS IDW000322
RegionNA
Data scoreC
Coordinates61.33297, -144.26918
References
CORNWALL, H. R., U.S.G.S. BULL. 1223, P. 39KINGSTON, J. AND MILLER, D. J., U.S.G.S. BULL. 943-C., P. 49OVERBECK, R. M., U.S.G.S. BULL. 712, P. 91BUDDINGTON, A.F., 1924, ALASKAN NICKEL MINERALS: ECONOMIC GEOLOGY, V.19, NO.6, P.521-5411907 DIREXPL SEVERAL TEST PITS, TWO TUNNELS DUG.1907 GEOCHEM SAMPLE ANALYSIS DISCLOSED PRESENCE OF NI1911 RECON U.S.G.S., MOFFITT DESCRIBED DEPOSIT.1917 RECON U.S.G.S., OVERBECK EXAMINED DEPOSIT.1942 RECON U.S.G.S., KINGSTON AND MILLER SPENT 5 WEEKS.CORNWALL, H.R., 1966, U.S.G.S. BULL. 1223, P.39, MAP P.10-11