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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  28-Feb-2003 by Peter S. Fischl (PSF)

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NMI
Name RALEIGH SOUTH Mining Division Kamloops
BCGS Map 092I079
Status Past Producer NTS Map 092I16W
Latitude 050º 46' 42'' UTM 10 (NAD 83)
Longitude 120º 18' 23'' Northing 5628634
Easting 689895
Commodities Limestone Deposit Types R09 : Limestone
Tectonic Belt Intermontane Terrane Harper Ranch
Capsule Geology

Three narrow, closely-spaced lenses of Permian-Carboniferous limestone outcrop on the northwest flank of Dome Hills on the east side of the North Thompson River, 12 kilometres north of the community of Kamloops. The three lenses lie within argillite of the Devonian to Permian Harper Ranch Group.

The southern lens extends up the mountainside for several hundred metres, averaging 46 metres in width. The lens is composed of dark grey, granular limestone with irregularly distributed patches and nodules of chert. A 46-metre chip sample taken across the lens analysed 46.82 per cent CaO, 0.39 per cent MgO, 15.04 per cent insolubles, 0.52 per cent R2O3, 0.33 per cent Fe2O3, 0.015 per cent MnO, 0.012 per cent P2O5, trace of sulphur and 37.16 per cent ignition loss (Minister of Mines Annual Report 1959, page 170, Sample 4).

The northern lens is 30 metres wide and is exposed for 60 metres up the mountainside. The lens consists of very fine grained, bluish grey and white, brittle limestone with calcite veins and some irregular patches of pale blue dolomite. A sample from this lens analysed 53.89 per cent CaO, 0.14 per cent MgO, 2.98 per cent SiO2, 0.37 per cent R2O3, 0.21 per cent Fe2O3 and 0.01 per cent sulphur (Canada Bureau of Mines Report 811, page 217). The central lens has similar dimensions as the northern lens.

Two larger lenses of limestone trending northwest for between 1800 and 3100 metres outcrop to the northeast.

Limestone was at one time quarried and burnt on site in a lime kiln earlier this century.

Bibliography
EMPR AR *1959-167-170
EMPR OF 1992-18
GSC MAP 886A; 887A; 9-1963; 1394A; 42-1989
GSC MEM 249, p. 7
GSC OF 165; 980; 2490
GSC P 44-20; 79-1A, pp. 357-360; 82-1A, pp. 293-297; 85-1A, pp. 349-358
CANMET RPT 811, Part 5, pp. 215,216

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