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Minor podiform chromite deposit, 5 of 20 in Siskiyou county (in California)

Sections of this page: [Geologic] - [Economic] - [Reference]

Geologic Information
Other namesLambert, Chromite King
CountryUnited States
State or provinceCalifornia
Geographic location:41°37'47"N, 122°43'42"W
(-122.728333, 41.629722)
Geographic context: (click for info)
Deposit typeminor podiform chromite
Model typeunknown
Deposit formlenses, pods, stringers
Deposit texturemassive
Ore typeMetallurgical
Age of depositOrdovician
Age (m.y.)465million years
Area of deposit732sq m
Ore body length30.5m
Ore body width24m
Host rock typedunite
Host rock length23000
Host rock width4000
Paleotectonic settingsuprasubduction
Deposits < 10kmpodiform chromite
Rocks within 5kmdunite
phyllitic quartzite
Geologic map unit-122.728333333333, 41.6297222222222
Nearby scientific dataFind additional scientific data near this location
Economic Information
Discovery date1916?
Startup date1916?
Tonnage0.000839million metric tons
Ore depth0m
Cr2O3 grade52percent
Rh grade0.021g/t
Ir grade0.17g/t
Ru grade0.65g/t
Pd grade0g/t
Pt grade0g/t
Fe %11.3percent
Cr:Fe ratio3.2
Al2O3 %7.26percent
Si2O2 %3.22percent
Reference information
Comments29 t contained 54.4% Cr2O3, 11.18% Fe, 3.22% silica, 7.26% Al2O3, 15.55% MgO. Production 250-500 t (say 300 t) from WWI, 539 t from WWII. Largest body contained 157 t. Analysis 0.17 ppm Ir, 0.65 ppm Ru, 0.021 ppm Rh, <0.001 Pd, <0.01 ppm Pt. 11.02-11.6% Fe, Cr/Fe 3.07-3.33. Siskiyou County.
Wagner, D.L., and Saucedo, G.J., 1987, Geologic map of the Weed quadrangle, California: California Division of Mines and Geology Regional Geologic Map Series Map no. 4A, scale 1:250,000.
Wells, F.G., and Cater, F.W., Jr., 1950, Chromite deposits of Siskiyou County, California, in Geological investigations of chromite in California, Part 1--Klamath Mountains: California Division of Mines Bulletin 134, pt. 1, ch. 2, 127 p.
Carlson, C.A., Wilson, S.A., Carlson, R.R., Bradley, L., Cornell, J., Gent, C., Gass, W., Groeneboer, H., Haffty, J., Haubert, A., Love, A., McDade, J.M., Moore, R., Riley, L., Moring, B.C., Singer, D.A., and Page, N. J, 1985, Analyses for platinum group elements in samples from podiform chromite deposits, California and Oregon: U.S. Geological Survey Open-File Report 85-442, 15 p.
Metcalf, R.V., Wallin, E.T., Willse, K.R., and Muller, E.R., 2000, Geology and geochemistry of the ophiolitic Trinity terrane, California--Evidence of middle Paleozoic depleted supra-subduction zone magmatism in a proto-arc setting, in Dilek, Y., Moores, E.M., Elthon, D., and Nicolas, A., eds., Ophiolites and oceanic crust--New insights from field studies and the Ocean Drilling Program: Geological Society of America Special Paper 349, p. 403-418.
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