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Minor podiform chromite deposit, 14 of 22 in Butte county (in California)
Sections of this page: [Geologic] - [Economic] - [Reference]
| Other names | Dynamite Kid, Wells |
|---|---|
| Country | United States |
| State or province | California |
| Geographic location: | 39°42'26"N,
121°32'3"W (-121.534167, 39.707222) |
| Geographic context: | (click for info) |
| Deposit type | minor podiform chromite |
| Model type | Minor Podiform |
| Deposit form | lens, stringer |
| Ore type | Unknown |
| Age of deposit | Upper Triassic-Lower Jurassic or older (204±2 Ma U-Pb zircon on leucodiorite) |
| Age (m.y.) | 204million years |
| Area of deposit | 11.163sq m |
| Ore body length | 18.3m |
| Ore body width | 0.61m |
| Mineralogy | chromite |
| Host rock type | serpentine |
| Host rock length | 700 |
| Host rock width | 100 |
| Paleotectonic setting | suprasubduction |
| Ophiolite zone | tectonite |
| Deposits < 10km | podiform chromite |
| Rocks within 5km | serpentine harzburgite phyllite slate quartzite graywacke metabasalt metadacite metarhyolite basalt andesite andesite tuff breccia andesite mudflow andesite tuff andesite breccia granite granodiorite monzonite diorite alluvium |
| Geologic map unit | -121.534166666667, 39.7072222222222 |
| Nearby scientific data | Find additional scientific data near this location |
| Discovery date | 1917 | |
|---|---|---|
| Tonnage | 9.5e-05 | million metric tons |
| Mine depth | 3 | m |
| Ore depth | 0 | m |
| Cr2O3 grade | 38 | percent |
| Rh grade | 0.006 | g/t |
| Ir grade | 0.03 | g/t |
| Ru grade | 0.11 | g/t |
| Pd grade | 0.002 | g/t |
| Pt grade | 0 | g/t |
| Comments | Serpentine body 800 m long, 120 m wide. Analysis <0.01 ppm Pt. Fiddle Creek Complex between Western and Central belts. Butte County. |
|---|---|
| References | Burnett, J.L., and Jennings, C.W., 1962, Geologic map of California, Chico sheet: California Division of Mines and Geology, scale 1:250,000. Rynearson, G.A., 1951, Chromite deposits in the northern Sierra Nevada, California (Placer, Nevada, Sierra, Yuba, Butte, and Plumas counties), in Geological investigations of chromite in California, Part 3--Sierra Nevada: California Division of Mines Bulletin 134, pt. 3, ch. 5, 321 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. Saleeby, J.B., Shaw, H.F., Niemeyer, S., Moores, E.M., and Edelman, S.H., 1989, U/Pb, Sm/Nd, and Rb/Sr geochronological and isotopic study of northern Sierra Nevada ophiolitic assemblages, California: Contributions to Mineralogy and Petrology, v. 102, p. 205-220. |