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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  28-Mar-1991 by Laura L. Coughlan (LLC)

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Name RICHMOND (L.1508) Mining Division Trail Creek
BCGS Map 082F001
Status Past Producer NTS Map 082F04W
Latitude 049º 03' 29'' UTM 11 (NAD 83)
Longitude 117º 48' 41'' Northing 5434227
Easting 440722
Commodities Silver, Lead, Gold, Copper, Zinc Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
L01 : Subvolcanic Cu-Ag-Au (As-Sb)
Tectonic Belt Omineca Terrane Quesnel, Plutonic Rocks
Capsule Geology

The Richmond showings are hosted in a sequence of rocks of the Lower Jurassic Elise Formation, Rossland Group consisting of an augite porphyry sill, siltstone, and hornfelsic siltstone. The occurrence is located 400 metres south of the southern edge of the Early Jurassic Rossland Monzonite. The showings lie within the zone of thermal metamorphism associated with the monzonite intrusive. The grey to black siltstone and argillite grades to hornfels and forms distinct layers within the Rossland Group volcanic breccias. Stratigraphic relationships are uncertain but the siltstones grade laterally into sandstone and breccia. Ammonites of Early Jurassic age were reported to occur in the siltstone on Ivanhoe Ridge.

Mineralization occurs within sulphide veins in the augite porphyry, hornfelsed siltstone and greenstone. The ore is a mixture of arsenopyrite, pyrite and chalcopyrite with some marcasite. Veins in the metasediments host galena, sphalerite and locally, boulangerite. The vein strikes 080 degrees dipping steeply at 85 degrees north and lies within the South belt vein system.

In 1912, 11 tonnes of ore were mined from the Richmond vein system and 311 grams gold, 14,432 grams silver and 912 kilograms lead were recovered. The ore was comprised mainly of argentiferous galena with associated sphalerite, chalcopyrite, pyrrhotite with minor disseminations of arsenopyrite and pyrite in the layered host rock.

Refer to the Le Roi deposit (082FSW093) for a summary of the Rossland mining camp.

EMPR AR 1899-846; 1908-250; 1911-173; 1912-162,323; 1913-135; 1921-149; 1949-157-163
EMPR ASS RPT 9054, 10648, 16751, 19601
EMPR BULL *74; 109
EMPR EXPL 1980-59; 1982-51-52
EMPR FIELDWORK 1987, pp. 19-30; 1988, pp. 33-43; 1989, pp. 11-27; 1990, pp. 9-31
EMPR OF 1988-1; 1989-11; 1990-8; 1990-9; 1991-2; 1991-16
GSC MAP 1090A; 1504A; 1518
GSC MEM 77, p. 170; 308, pp. 157,205
GSC P 79-26
ECON GEOL Vol.68, 1973, pp. 1337-1346
PERS COMM Andrew, K., March 1991
*Thorpe, R.I. (1967): Controls of Hypogene Sulphide Zoning, Rossland, British Columbia, Ph.D. Thesis, University of Wisconsin