Previous record: (this is the first) Next record: 299

Section 14

Banded podiform chromite deposit, 1 of 6 in Trinity county (in California)

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

Geologic Information
Other namesCrow Creek Group, McConnell-Kirby, Chapman-Kirby
CountryUnited States
State or provinceCalifornia
Geographic location:41°9'9"N, 122°31'20"W
(-122.522222, 41.1525)
Geographic context: (click for info)
Deposit typebanded podiform chromite
Model typeBanded Podiform
Deposit formband
Deposit texturemassive, disseminated
Ore typeUnknown
Age of depositOrdovician
Age (m.y.)465million years
Area of deposit273sq m
Ore body length91m
Ore body width3m
Host rock typedunite
Host rock length62500
Host rock width57500
Paleotectonic settingsuprasubduction
Ophiolite zonetectonite
Deposits < 10kmpodiform chromite
Rocks within 5kmdunite
plagioclase lherzolite
glacial outwash
Geologic map unit-122.522222222222, 41.1525
Nearby scientific dataFind additional scientific data near this location
Economic Information
Discovery date<1943
Startup date1943
Tonnage0.002million metric tons
Mine depth5.4m
Ore depth0m
Cr2O3 grade41percent
Si2O2 %7percent
Reference information
CommentsHigh Fe content. Trinity County.
Wells, F.G., and Hawkes, H.E., 1965, Chromite deposits of Shasta, Tehama, Trinity, and Humboldt counties, California, in Geological investigations of chromite in California, Part 1--Klamath Mountains: California Division of Mines Bulletin 134, pt. 1, ch. 3, 191 p.
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.
O'Brien, J.C., 1965, Mines and mineral resources of Trinity County, California: California Division of Mines and Geology County Report 4, 125 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.
Show this information as [XML] - [GeoJSON]