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English Mountain Mine (Marguerite Consolidated; Marguerite Cons.; Marguerite claim; Helen D. claim), English Mountain, English Mountain District, Nevada Co., California, USA

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Latitude & Longitude (WGS84): 39° 27' 46'' North , 120° 33' 54'' West
Latitude & Longitude (decimal): 39.4627761841, -120.565002441
A former Cu-Au occurrence/mine located in sec. 6, T18N, R13E, MDM, 2.2 km (1.4 miles) NNW of English Mountain (coordinates of record), on the W shore of Jackson Lake (13 miles E of Graniteville; adjoins the English Mountain Gold Mine). The property comprises 40 acres or 105 acres (2 MRDS files). Operated by H. C. Schroeder (estate). MRDS database stated accuracy for this location is 500 meters.

NOTE: USGS MRDS file #10007668 presents geographic coordinates of -120.55853, 39.45795, stating that this mine is ¾ mile S of Jackson Lake versus along its W shore. The W shore location has all the indications on the topo map of a mining activity (dead end road at several structures). There is a large, geometric shaded area from the SE shore of the lake SSE-ward (probable claims).

Mineralization is a vein deposit hosted in diabase. The ore body is 15.24 meters wide and 304.8 meters long. Deposit is Cu-bearing gossan. Local rocks include Mesozoic volcanic rocks, unit 5 (Northern Sierra Nevada and Eastern Klamath Mountains).

Workings include underground openings comprised of 1,000 feet of drifts and crosscuts, one 500 foot drift along strike and another 300 feet long above it.

No production was reported.

Analytical data results: Pyrrhotite-pyrite assayed at 5% Cu, 45.9% Fe and 27.7% S. The pyrrhotite-marcasite assayed at 1.3% Cu, 51.4% Fe and 28.3% S.

Mineral List

5 entries listed. 5 valid minerals.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


MacBoyle, Errol (1919), Mines and mineral resources of Nevada County: California Journal of Mines and Geology, California Mining Bureau (Report 16): 16: 85.

McCulloch, W.C., Oesterling, W.A., Spurck, W.H., & Tischler, M.S. (1964), Minerals for Industry, Northern California, Southern Pacific Company: Vol. II: 24.

SMR 37, No. 3 (1941): 453, 457, Pl. 3.

Foote, A.B. (1941), The Price of Gold: California Journal of Mines and Geology: 37(3): 457.

Logan, Clarence August (1941), Mineral resources of Nevada County, California: California Division Mines (Report 37): 37(3): 374-408: Pl. 3.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10007668, 10102946 & 10212719.

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060570925.

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