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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  18-Feb-91 by Laura L. Coughlan(LLC)

Summary Help Help

NMI
Name NUGGET (L.8341), CALHOUN, O'DONNELL, FAWN Mining Division Nelson
BCGS Map 082F015
Status Past Producer NTS Map 082F03E
Latitude 49º 10' 04" N UTM 11 (NAD 83)
Longitude 117º 07' 06" W Northing 5446114
Easting 491374
Commodities Gold, Silver, Lead, Zinc, Silica, Copper Deposit Types I01 : Au-quartz veins
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The Nugget veins occur within white quartzites, argillic quartzites and argillites of the Hadrynian-Lower Cambrian Reno and Quartzite Range formations (Hamill Group). Gold-bearing ore shoots are within quartzites of the Upper and Middle Nugget Member and Navada Member of the Quartzite Range Formation. The ore shoots may be up to about one metre wide and are in the order of 10 to 60 metres along strike. The main workings have intersected the same shoot along a vertical extension in the order of 100 metres. Although there are a number of documented parallel veins (7), most production came from two main veins, the Calhoun and the Nugget, which are about 30 metres apart (Bulletin 31).

The sediments strike from 010 to 015 degrees and dip 60 degrees east and the showing lies on the west limb of the eastern anticline. The more northerly of the two main veins strikes 60 degrees and the southerly vein strikes 065 to 070 degrees. In the upper levels the veins dip about 75 degrees south but steepen at depth, while for most veins in the Sheep Creek camp the dips are near vertical and shallow with depth. The quartz veins may be very narrow or up to about one metre wide and contain crushed country rock and commonly bifurcate. There is little evidence of fresh sulphides even in the lower workings as they have been oxidized to limonite in association with disseminated free gold. Gold grades in the Nugget veins were apparently some of the higher values found in the camp and production records indicate much of the material contained about 35 grams per tonne gold. Mineralization in the veins includes pyrite, pyrrhotite, chalcopyrite, galena, sphalerite and native gold.

Production figures have been intertwined historically between the Nugget and Motherlode (082FSW041) and later the Reno (082FSW036) occurrence. Production values have been separated out among the three as best as possible but some error may still exist. About 37,000 tonnes of ore was produced from the Nugget and 768 kilograms of gold, 283 kilograms of silver, 3294 kilograms of lead and 1273 kilograms of zinc recovered. Most production took place between 1907 and 1954.

Indicated reserves on the Nugget property are 30,089 tonnes grading 16.1 grams per tonne gold; indicated reserves on the Calhoun zone are 15,184 tonnes grading 15.4 grams per tonne gold; indicated reserves on the Fawn zone are 3,882 tonnes grading 28.4 grams per tonne gold (George Cross News Letter No. 217 (November 12), 1987).

Refer to the Motherlode (082FSW041) for a summary of the Sheep Creek mining camp.

Bibliography
EMPR AR 1907-103,213; 1908-109,246; 1909-120,123,125,272,276;  1910-109,243; 1911-161,284; 1912-155; 1913-131; 1915-156,159,  445; 1916-523; 1918-173; 1919-134; 1920-131; 1921-142; 1922-205;  1924-191; 1932-190; 1933-229; 1935-E30,G50; 1936-E47; 1938-A36,  E39,40; 1940-26,68; 1941-26,67; 1942-27,64; 1943-66; 1944-40,  63; 1945-43,102; 1946-38,146; 1947-163; 1948-134; 1949-168;  1950-124; 1954-50,126; 1956-A50,80; 1957-A46,44; 1958-A45,38;  1959-61; 1960-68; 1961-68
EMPR ASS RPT 15705, 16704, 20749, 22043
EMPR BC METAL MM00158
EMPR BULL 1; *31, pp. 26,31,40,42,43,50,77; 109
EMPR FIELDWORK 1987, pp. 19-30; 1988, pp. 33-43; 1989, pp. 11-27;  1990, pp. 9-31
EMPR GEM 1973-78
EMPR MAP 65 (1989)
EMPR MINING Vol.I 1975-1980
EMPR OF 1988-1; 1989-11; 1990-8; 1990-9; 1991-2; 1991-16; 1992-1
EMPR P 1991-4, p. 186
EMPR PF (Starr, C.C. (1925): Report of Examination of the Nugget  and Motherlode Mines; Starr, C.C. (1940): Geological Notes and  Impressions on the Motherlode, Nugget and Bluestone Veins  (located in 082FSW041 - Motherlode); Map of mine workings of  Sheep Creek Gold Camp, Nugget Mines Ltd.; Murray, J. (1988):  The Sheep Creek Gold Camp; Property report by Searchlight  Resources Inc.; News Release, Gunsteel Resources Inc., May 25,  1989; History and Assessment by M.P. Gross, May 24, 1989;  Excerpt from The Miner, The Sheep Creek Gold Mining Camp by R.A.  McGuire; Endersby, S.A. (1974): Letter to J.E. McMynn, 2 p.)
GSC MAP 50-19A; 299A; 1068; 1090A; 1091A; *1145A; 1956-3
GSC MEM *172, pp. 28,30; 308, p. 174
GSC OF 1195
GCNL Dec.11, 1986; *#217,#227, 1987; #147, 1988; #68(Apr.10), 1989
N MINER Jan.26, Mar.9, 1987; Aug.15, 1988; Jan.9, Apr.17, 1989
V STOCKWATCH Nov.10, 1987
WIN May 1987

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