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Copper Creek

Minor podiform chromite deposit, 1 of 37 in Del Norte county (in California)

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

Geologic Information
Other namesLow Divide, Rowdy Creek
CountryUnited States
State or provinceCalifornia
Geographic location:41°55'21"N, 124°2'5"W
(-124.034722, 41.9225)
Geographic context: (click for info)
Deposit typeminor podiform chromite
Model typeMinor Podiform
Deposit formlenses, patches, stringers
Deposit texturemedium-grained massive to disseminated
Ore typeMetallurgical
Age of depositMiddle Jurassic (162-164 Ma)
Age (m.y.)163million years
Area of deposit109.8sq m
Ore body length18.3m
Ore body width6m
Host rock typedunite
Host rock length110000
Host rock width24000
Paleotectonic settingsuprasubduction
Ophiolite zonetectonite
Deposits < 10kmpodiform chromite, silica-carbonate Hg, lateritic Ni-Co, placer gold, mafic volcanogenic massive sulfide
Rocks within 5kmdunite
Geologic map unit-124.034722222222, 41.9225
Nearby scientific dataFind additional scientific data near this location
Economic Information
Discovery date1886
Startup date1886
Tonnage0.0035million metric tons
Ore depth0m
Cr2O3 grade41percent
Cr:Fe ratio2.5
Reference information
CommentsTotal production 3,165 t @ 41% Cr2O3. Reserves estimated at a few hundred tons (say 300 t). Dimensions in part based on glory hole. Del Norte County.
Wells, F.G., Cater, F.W., Jr., and Rynearson, G.A., 1946, Chromite deposits of Del Norte County, California, in Geological investigations of chromite in California, Part 1--Klamath Mountains: California Division of Mines Bulletin 134, pt. 1, ch. 1, 76 p.
Evans, J.G., 1984, Structure of part of the Josephine Peridotite, northwestern California and southwestern Oregon: U.S. Geological Survey Bulletin 1546-A, p. 7-37.
Harper, G.D., Saleeby, J.B., and Heizler, M., 1994, Formation and emplacement of the Josephine ophiolite and the Nevadan orogeny in the Klamath Mountains, California-Oregon--U/Pb zircon and 40Ar/39Ar geochronology: Journal of Geophysical Research, v. 99, B3, p. 4293-4321.
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