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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  29-Jun-1989 by Peter S. Fischl (PSF)

Summary Help Help

NMI
Name PARSONS BRIDGE, ESQUIMALT HARBOUR Mining Division Victoria
BCGS Map 092B043
Status Past Producer NTS Map 092B06W
Latitude 048º 27' 12'' UTM 10 (NAD 83)
Longitude 123º 27' 31'' Northing 5366790
Easting 466091
Commodities Limestone, Iron, Copper Deposit Types R09 : Limestone
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Parsons Bridge deposit is located 300 metres southwest of Parsons Bridge on the east side of Highway 1A at the head of Esquimalt Harbour.

A steeply dipping limestone lens, 30 metres wide, strikes 360 to 030 degrees for 60 metres in the Mesozoic and/or Paleozoic Wark Gneiss. The Wark Gneiss is thought to be the metamorphic equivalent of a mafic unit of either the Paleozoic Sicker Group or the Upper Triassic Karmutsen Formation (Vancouver Group), the latest metamorphism having taken place in the Jurassic. The lens is bounded to the east and southeast by a granitic intrusive and is intruded by greenstone dykes.

The limestone is fine grained, bluish grey and high calcium in composition. Two 18.3 metre long chip samples taken in succession across the quarry face and the adjacent slope averaged 53.45 per cent CaO, 1.07 per cent MgO, 2.25 per cent insolubles, 0.415 per cent R2O3, 0.325 per cent Fe2O3, 0.015 per cent MnO, 0.012 per cent P2O5, 0.0695 per cent sulphur and 42.4 per cent ignition loss (Bulletin 40, page 91).

Limestone was initially quarried here in 1912 and continued from 1917 to 1922 and 1938 to 1941. Between 1917 and 1941, 7,694 tonnes of limestone were quarried.

In 1907 and 1908, the Silica Brick and Lime Co. produced over 4 million lime-silica bricks from this area.

Bibliography
EMPR AR *1907-23,155; 1908-25,166
EMPR BULL *23, pp. 98,99; *40, p. 91
EMPR OF 1992-18, pp. 48,49-50
EMPR P 1993-23
EMPR PF (Production Record 1917-1941)
GSC MAP 1553A
GSC MEM 13, p. 197; 36, pp. 43,133,134
GSC OF 463
CANMET REPORT 811, Part 5, pp. 132,142
GAC FIELD TRIP GUIDEBOOK, Trip 7 - Muller, J.E. (1977): Geology of Vancouver Island
Hudson, R. (1997): A Field Guide to Gold, Gemstone & Mineral Sites of British Columbia, Vol. 1: Vancouver Island, p. 63
EMPR PFD 5499

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