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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  02-Apr-1991 by Laura L. Coughlan (LLC)

Summary Help Help

NMI
Name SNOWDROP, DOMINION (L.1513), SNOWDROP (L.3513), GOLD KING (L.1229), CONCORDIA (L.2943), SNOWDROP FRACTION Mining Division Trail Creek
BCGS Map 082F001
Status Developed Prospect NTS Map 082F04W
Latitude 049º 04' 33'' UTM 11 (NAD 83)
Longitude 117º 49' 31'' Northing 5436214
Easting 439729
Commodities Gold, Silver, Copper, Lead Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Quesnel, Slide Mountain
Capsule Geology

The Snowdrop workings lie within greenstone and altered green- stone of the Lower Jurassic Elise Formation, Rossland Group and in dark grey siltstone and sandstone of the Pennsylvanian and possibly Permian Mount Roberts Formation. The veins lie adjacent to the northern contact of a body of serpentinite of probable Permian age which trends easterly and dips steeply to the south. The contact is an east trending fault which is terminated by the Middle Eocene Marron Formation on the west and the Jumbo fault on the east.

On the Snowdrop property, amygdules and small lenticular incl- usions of limestone in the greenstone indicate that these rocks are in part, flows. In the upper workings of the Snowdrop mine, the veins are quartz-carbonate filled fissures which trend northeast and dip 50 degrees to the southeast. Other individual veins are not continuous bodies of quartz but rather are tight fractures which contain lenses which pinch and swell and change their attitudes. Widths range from a few centimetres to 0.5 metres in a few places as much as 2.0 metres. Mineralization consists of pockets which host free gold, often in particles visible to the naked eye. Although, occasional concentrations do occur, sulphides are not common in the veins. These sulphides include pyrite, chalcopyrite, and galena. Blades of marcasite were found included in chalcopyrite in ore from the Snowdrop property. Pyrite is also quite widely disseminated in small amounts throughout the wallrock. The only other gangue mineral in addition to the quartz is ankeritic carbonate, which occurs in irregular areas in the vein and occasionally as veinlets in the surrounding rocks. Hematite occurs on the Snowdrop property and is mostly represented as pseudomorphs of magnetite. Also, hematite included in chalcopyrite is completely replaced.

The veins were mined in 1931, 1932, 1937 and 1955 to 1957. Six tonnes of ore were shipped and 6843 grams gold and 16640 grams silver were recovered.

Bibliography
EMPR AR 1922-355; 1928-356; 1929-363; 1931-138; 1932-26,160; 1937-A39,E49; 1948-129; 1954-122; 1955-A49; 1956-76; 1957-A47
EMPR BC METAL MM00701
EMPR BULL 1, p. 123; *74; 109
EMPR FIELDWORK 1987, pp. 19-30; 1988, pp. 33-43; 1989, pp. 11-27; 1990, pp. 9-31
EMPR GEM 1972-50
EMPR OF 1988-1; 1989-11; 1990-8; 1990-9; 1991-2
GSC MAP 1518; 1090A; 1504A
GSC MEM 77; 308, p. 176
GSC OF 1195
GSC P 79-26
Thorpe, R.I. (1967): Controls of Hypogene Sulphide Zoning, Rossland, British Columbia, Ph.D. Thesis, University of Wisconsin
EMPR PFD 3179, 750551, 822470, 802646

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