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Plymouth Rock Mine, Jenny Lind, Jenny Lind District, Calaveras Co., California, USA

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A former lode Au-Ag-Pb-Cu mine located in the NE¼SW¼ sec. 23, T3N, R10E, MDM, 2.2 km (1.3 miles) E of Jenny Lind on the divide between Rich Gulch and North Gulch (on the ridge SE of the Calaveras River). Operated intermittently during the period 1888 to 1917 and during 1933. MRDS database stated accuracy for this location is 100 meters.

Mineralization is a vein deposit hosted in greenstone. The ore body strikes NW and dips SW. The mineralized zone is in altered greenstone. Altered diabase is cut by quartz veinlets and mineralized with auriferous sulfides, pyrite, chalcopyrite, galena and sphalerite. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).

Workings include underground openings comprised of a 362 foot drift adit, and a 135 foot inclined shaft. A mill on the property treated the ore in a ten-stamp mill.

Production data are found in: Clark, Wm. B. & P.A. Lydon (1962).

Intermittent production during the period 1890 and 1933. Shipments made in 1917 and in 1933 contained about 1½% combined Pb & Cu.

Mineral List



6 entries listed. 6 valid minerals.

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References

Tucker, W. Burling (1916), Amador, Calaveras, Tuolumne Counties: California Journal of Mines and Geology, California Mining Bureau. (Report 14): 14: 1-172; […(abstract): Geol. Zentralbl., Band 27: 396 (1922)]: 101.

Logan, Clarence August and Franke, H. (1936), Mines and Mineral Resources of Calaveras Co.: California Division of Mines, California Journal of Mines & Geology, California Division of Mines (Report 32): 32(3): 316.

Eric, J.C. (1948), Copper in California: California Division of Mines Bulletin 144: 222.

California Division of Mines Economic Mineral Map of California No. 6 (194_).

California Division of Mines (1957), Economic Mineral Map of California No. 7.

Goodwin, Joseph Grant (1957) Lead and zinc in California. California Journal of Mines and Geology, Division of Mines (Report 53): 53(3&4): 436.

Clark, Wm. B. & P.A. Lydon (1962), Mines and mineral resources of Calaveras County, California: California Division of Mines & Geology County Report 2; [… Geological Society of America Proceedings, 1933: 312-313, 1934]: 174, Pl. B.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10034952, 10109122 & 10235120.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060090073.

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