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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  15-Mar-91 by Garry J. Payie(GJP)

Summary Help Help

NMI
Name SILVER DOLLAR (L.12599), LUCKY BOY (L.12600) Mining Division Nelson
BCGS Map 082F014
Status Past Producer NTS Map 082F03W
Latitude 49º 11' 55" N UTM 11 (NAD 83)
Longitude 117º 17' 19" W Northing 5449575
Easting 478974
Commodities Gold, Silver, Lead, Zinc, Copper Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Quesnel, Plutonic Rocks
Capsule Geology

The Silver Dollar and Lucky Boy occurrences are underlain by greywackes, argillites and interbedded tuffs and flows of the Lower Jurassic Hall Formation, Rossland Group. Feldspar-quartz porphyry dykes and/or sills occur and are somewhat conformable to bedding. The strata, striking north and dipping 40 to 90 degrees east, has been folded and appears to have been overturned. A granitic stock of the Middle to Late Jurassic Nelson Intrusions occurs within several hundred metres of the workings.

The Silver Dollar occurrence occurs in argillite and consists of a crosscutting vein, up to 1.5 metres wide, striking 290 degrees and dipping steeply north. Sphalerite, galena with only minor chalcopyrite and pyrite occur erratically along the strike length of the vein with calcite and ankerite.

The Lucky Boy vein is hosted in a shear zone, striking about 020 degrees north and dipping 10 to 30 degrees east. Pyrite is found as euhedral crystals in all rocks types. Quartz within the shear zone occurs as veins, veinlets and stringers that are generally well fractured and broken. In and along the margins of the quartz are pyrite, chalcopyrite, galena, rare sphalerite and bornite and tetrahedrite. Alteration consists carbonatization and silicification. Samples taken from the underground working assayed up to 57.81 grams per tonne gold and 3790 grams per tonne silver and base metal values range up to 5.5 per cent lead, 3.7 per cent zinc and 0.82 per cent copper (Assessment Report 18786).

Production figures from both the Silver Dollar and the Lucky Boy workings are combined. Production was reportedly intermittent from 1899 to 1970 but records indicate that from 1947 to 1970, 5,425 tonnes of ore were mined which produced 50,916 grams of gold, 1,818,469 grams of silver, 52,597 kilograms of lead and 60,230 kilograms of zinc.

Bibliography
EMPR AR 1899-597; 1911-161; 1912-155; 1913-128; 1914-329; 1915-164;  1917-448; 1919-370; 1922-209; 1928-343; 1929-353; 1930-276; 1947-  162; 1956-80; 1965-A55,181; 1966-A51,212; 1967-A53,244; 1968-  A53,242
EMPR ASS RPT *18786
EMPR BC METAL MM01067
EMPR BULL 109
EMPR FIELDWORK 1987, pp. 19-30; 1988, pp. 33-43; 1989, pp. 11-27;  1990, pp. 9-31
EMPR GEM 1969-317; 1970-480
EMPR INDEX 3-218
EMPR OF 1988-1; 1989-11; 1990-8; 1990-9; 1991-2; 1991-16
GSC MAP 299A; 1090A; 1091A; 1145A
GSC MEM *172, p. 84; 308, p. 185
GSC OF 1195
GCNL #97,#141, 1988; #9, 1989

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