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Minor podiform chromite deposit, 2 of 6 in Trinity county (in California)
Sections of this page: [Geologic] - [Economic] - [Reference]
| Country | United States |
|---|---|
| State or province | California |
| Geographic location: | 41°9'33"N,
122°30'57"W (-122.515833, 41.159167) |
| Geographic context: | (click for info) |
| Deposit type | minor podiform chromite |
| Model type | Minor Podiform |
| Deposit form | sinuous ribbons |
| Deposit texture | massive |
| Ore type | Metallurgical |
| Age of deposit | Ordovician |
| Age (m.y.) | 465million years |
| Mineralogy | chromite |
| Host rock type | dunite |
| Host rock length | 62500 |
| Host rock width | 57500 |
| Paleotectonic setting | suprasubduction |
| Ophiolite zone | tectonite |
| Deposits < 10km | podiform chromite |
| Rocks within 5km | dunite serpentine harzburgite plagioclase lherzolite gabbro pyroxenite diorite glacial outwash |
| Geologic map unit | -122.515833333333, 41.1591666666667 |
| Nearby scientific data | Find additional scientific data near this location |
| Tonnage | 3e-06 | million metric tons |
|---|---|---|
| Ore depth | 0 | m |
| Cr2O3 grade | 50 | percent |
| Comments | Location uncertain (5,100 ft elevation in the NE quarter of Section 14). Trinity 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 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. 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. |