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Mill Gulch Mine, North Elder Creek group (Joyce Mine; Hill Mine; Noble Electric Steel Company Mine; SW Hill Mine; Elder Creek Mine), Tehama Co., California, USA

Latitude: 40°1'36"N
Longitude: 122°39'11"W
A former Cr mine located in sec. 16, T25N, R7W, MDM, 2.8 km (9,300 feet) NW of Copple Place, along the North Fork Elder Creek. Discovered in 1886. Produced 1928-1955. Operated by the Tehama Consolidated Chrome Co. (1946). MRDS database accuracy for this location is not stated.

Mineralization is hosted in rocks of the Knoxville Formation (dunite). Associated rocks include diorite. The ore body is lenticular, strikes N35W, dips moderately NE at a thickness of 9.75 meters, width of 22.86 meters, and a length of 213.36 meters. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains).

Workings include surface and underground openings comprised of at least 4 tunnels and numerous small pits and trenches (1940/s).

Production data are found in: Stinson, Melvin Clarence (1975) California Division of Mining and Geology Mineral Property Report (unpublished).

Reserve/resource data are found in: Rynearson, Garn Arthur (1946): 208-209.

Reserves and resources: In-situ (1944): Total resources: 27,935,000 metric tons of ore at a grade of 10 weight percent Cr2O3.

Mineral List

Chromite


1 entry listed. 1 valid mineral.

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References

Rynearson, Garn Arthur (1946), Chromite deposits of the North Elder Creek area, Tehama County, California: USGS Bulletin 945-G: 208-209.

Wells, F.G. and Hawkes, H.E. (1965) Chromite deposits of Shasta, Tehama, Trinity and Humboldt counties, California. California Division Mines and Geology Bulletin 134, part 1, chapter 3: 166-168.

Stinson, Melvin Clarence (1975) California Division of Mining and Geology Mineral Property Report (unpublished).

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10043460 & 10077849.

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