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Collier Mine (Blood Mine; Sandwich Mine), Murphys, Murphys District (Esmeralda District; Sperry District), East Belt, Calaveras Co., California, USA

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A former Au-Zn-Ag-Cu-Pb-Sb mine located in the SE¼ sec. 1, T3N, R14E, MDM, about 6 km E of Murphys and 1.8 km (1.1 miles) W of Stanislaus (Stanislaus County, W of the Stanislaus River (4 miles E of Murphys and 1 mile SW of the powerhouse). Discovered in 1878. Operated almost continually until 1899. ACTIVE 1925 - 1926. MRDS database stated accuracy for this location is 100 meters.

NOTE: USGS MRDS database file #10102615 presents geographic coordinates of 120.71684W, 37.92185N, and places this mine in sec. 24, T1N, R11E, while the other 2 MRDS files place it in 120.39W and 38.13N, in sec. 1, T3N, R14E, MDM. The commonality of much of the other data in file #10102615 with those in the other 2 files strongly indicates that file #10102615 is concerned with the same mine and that the geographic coordinates and T&R values are in error.

Mineralization is a vein deposit hosted in rocks of the Calaveras Group (siliceous slate ?), which strike almost W. The ore body strikes W and dips 80N. The main vein has dark-colored quartz. Local rocks include Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range).

Workings include underground openings with an overall depth of 53.34 meters, and comprised of a 175 foot shaft & over 400 feet of drifts, 7 W-trending drift adits from 140 to 400 feet long and related raises and winzes. Drilled by the U.S. Bureau of Mines in 1944. Two holes were drilled. Both holes disclosed the presence of Zn, Cu, Au & Ag, but no commercial ore was intersected. (per MRDS file #10102615: An inclined shaft at 51 degrees with levels at 56, 124 & 167 feet. An abandoned shaft lies 150 feet SE of the main shaft. Over 400 feet of drifts.)

Production data are found in: Goodwin, J.G. (1957): 427.

Production was up to $6,000 per month (period values).

Production statistics: Year: 1944 (period 1942-1944): ^8% Zn, 1% Cu, and 0.75% Pb, ore with Au & Ag.

Mineral List

14 entries listed. 14 valid minerals.

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Mining and Scientific Press (1878), (9/28/1878): 196.

Mining and Scientific Press (1879), (5/10/1879): 301.

Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp. (includes catalog of minerals of California pp. 63-410), and miscellaneous observations on mineral products): 183.

Mining and Scientific Press (1885), (8/8/1885): 104.

Mining and Scientific Press (1899), (4/15/1899): 405.

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)].

Knopf, Adolf (1929), The Mother Lode system of California: USGS Professional Paper 157, 88 pp.; […(abstract): Engineering & Mining Journal: 128: 24 (1929); […Geol. Zentralbl., Band 41: 364-367 (1930)]: 39.

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): 249.

Heyl, George Richard (1948a) Foothill copper belt of the Sierra Nevada: California Division Mines Bulletin 144: 11-29.

Heyl, George Richard (1948c) The zinc-copper mines of the Quail Hill area, Calaveras County, California. California Division Mines Bulletin 144: 124-125.

Goodwin, Joseph Grant (1957) Lead and zinc in California. California Journal of Mines and Geology, Division of Mines (Report 53): 53(3&4): 427.

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]: 51, 60, 144.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 69.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 75, 82, 96, 109, 127, 291.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10029400, 10102615 & 10114430.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060090723.

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