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Mineral Hill group (Western Copper; Monmouth - Climax), Spenceville, Spenceville District, Nevada Co., California, USA

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Latitude & Longitude (WGS84): 39° 9' 0'' North , 121° 15' 31'' West
Latitude & Longitude (decimal): 39.1500015259, -121.258613586
A former lode Cu-Au occurrence/mine located in sec. 13, T15N, R6E, MDM, 4.0 km (2.5 miles) NNE of Spenceville, SE of Allenwood Hill, W of Hackett Creek. Owed/operated by C. C. Bitner. MRDS database accuracy for this location is not stated.

The ore body strikes N26W and dips E at a thickness of 9.14 meters. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Workings include underground openings with a length of 80.77 meters and an overall depth of 45.72 meters and comprised of a 15 foot shaft, a 150 foot deep inclined shaft, a 70 foot tunnel, a crosscut and a 30 foot deep shaft. In 1908 the mining company was driving a deep tunnel to obtain 500 feet of depth under the best of its claims.

A considerable amount of carbonate ore was shipped from this mine and was said to have had a value of $12.50 (period values) Au/ton and 10% Cu.

Mineral List

1 entry listed. 1 valid mineral.

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MacBoyle, Errol (1919), Mines and mineral resources of Nevada County: California Journal of Mines and Geology, California Mining Bureau (Report 16): 16: 87.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10031665.

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