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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  21-Aug-1989 by Peter S. Fischl (PSF)

Summary Help Help

NMI
Name REDROCKY CREEK Mining Division Cariboo
BCGS Map 093J067
Status Past Producer NTS Map 093J10E
Latitude 054º 37' 56'' UTM 10 (NAD 83)
Longitude 122º 42' 21'' Northing 6053906
Easting 518989
Commodities Limestone Deposit Types R09 : Limestone
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

Limestone is exposed for 366 metres along a north trending bluff up to 90 metres high between the John Hart highway (Highway 97) and the Westcoast Transmission pipeline, just north of Redrocky Creek, 80 kilometers north of Prince George. The deposit lies near the north end of a 25-kilometre long northwest trending fault-bounded band of limestone with minor dolomite and quartzite of the Upper Ordovician to Middle Silurian Sandpile Group. The band varies up to 4 kilo- metres in width. Banding (bedding ?) at the bluff strikes northwest and dips gently northeast.

The limestone is comprised of numerous rounded and ellipsoidal nodules 1 to 10 millimetres in diameter of secondary origin in a fine-grained dark grey to black matrix displaying oolites and pisolites in thin section. The nodules are composed of calcite with minor dolomite and iron oxide. The limestone is well fractured and cut by abundant white calcite stringers. Occasional grains of quartz and pyrite are present. A sample composed of chips taken at 3.0 metre intervals for 183 metres across the base of the bluff contained 53.82 per cent CaO, 0.38 per cent MgO, 2.80 per cent insolubles, 0.36 per cent R2O3, 0.21 per cent Fe2O3, 0.005 per cent MnO, 0.03 per cent P2O5, 0.02 per cent sulphur and 42.61 per cent ignition loss (Annual Report 1957, p. 86). Reserves are estimated at 9,100,000 tonnes with the following range in composition: 52.5 - 53.8 per cent CaO, 0.4 - 0.8 per cent MgO, 1.5 - 2.0 per cent insolubles and 1.0 - 1.4 per cent Fe2O3 + Al2O3 (L.T. Jory, 1972).

This deposit was assessed by Calox Industries in the late 1960's and early 1970's. A small amount of limestone was quarried by the company in 1968. The deposit was further developed by Tri-Lime Resources. Production began in 1983, continued for only a short while, and by September 1983 the company was in receivership. No production figures are available.

Bibliography
EMPR AR 1957-85-86
EMPR GEM 1969-395
EMPR PF (*Jory, L.T., Howey, H.O. (1971 & 1972): Redrocky Creek Limestone Deposit Summary Report; Calox Industries Ltd. Prospectus May, 1972; Cross Section of Drilling by Calox Industries, 1973; Memorandum by Z.D. Hora, 1979; Letter by Z.D. Hora, 1979 )
GSC MAP 1424A; 1204A; 2-1962
EMPR PFD 15092

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