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Minor podiform chromite deposit, 5 of 20 in Siskiyou county (in California)
Sections of this page: [Geologic] - [Economic] - [Reference]
| Other names | Lambert, Chromite King |
|---|---|
| Country | United States |
| State or province | California |
| Geographic location: | 41°37'47"N,
122°43'42"W (-122.728333, 41.629722) |
| Geographic context: | (click for info) |
| Deposit type | minor podiform chromite |
| Model type | unknown |
| Deposit form | lenses, pods, stringers |
| Deposit texture | massive |
| Ore type | Metallurgical |
| Age of deposit | Ordovician |
| Age (m.y.) | 465million years |
| Area of deposit | 732sq m |
| Ore body length | 30.5m |
| Ore body width | 24m |
| Mineralogy | chromite |
| Host rock type | dunite |
| Host rock length | 23000 |
| Host rock width | 4000 |
| Paleotectonic setting | suprasubduction |
| Deposits < 10km | podiform chromite |
| Rocks within 5km | dunite harzburgite phyllitic quartzite blueschist alluvium |
| Geologic map unit | -122.728333333333, 41.6297222222222 |
| Nearby scientific data | Find additional scientific data near this location |
| Discovery date | 1916? | |
|---|---|---|
| Startup date | 1916? | |
| Tonnage | 0.000839 | million metric tons |
| Ore depth | 0 | m |
| Cr2O3 grade | 52 | percent |
| Rh grade | 0.021 | g/t |
| Ir grade | 0.17 | g/t |
| Ru grade | 0.65 | g/t |
| Pd grade | 0 | g/t |
| Pt grade | 0 | g/t |
| Fe % | 11.3 | percent |
| Cr:Fe ratio | 3.2 | |
| Al2O3 % | 7.26 | percent |
| Si2O2 % | 3.22 | percent |
| Comments | 29 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. |
|---|---|
| References | 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. |