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File Created: 31-Aug-1992 by Robert (Bob) A. Lane (RAL)
Last Edit:  12-Nov-2014 by Laura deGroot (LDG)

Summary Help Help

NMI
Name CHILLIWACK LAKE, CHILLIWACK LAKE GRANITE, SUMAS SKY, MARGRANITE, QUARRY PACIFIC Mining Division New Westminster
BCGS Map 092H003
Status Past Producer NTS Map 092H03W
Latitude 049º 05' 48'' UTM 10 (NAD 83)
Longitude 121º 26' 00'' Northing 5439384
Easting 614366
Commodities Granite, Dimension Stone, Building Stone Deposit Types R03 : Dimension stone - granite
Tectonic Belt Coast Crystalline Terrane Plutonic Rocks
Capsule Geology

At the Chilliwack Lake quarry, the rock is a fine grained, equigranular, light grey granite to quartz monzonite of the Oligocene Chilliwack batholith. Common irregularly-shaped masses of biotite and 5 per cent disseminated biotite (altered to chlorite?) give the otherwise evenly textured rock some character. Pale pink to white potassium feldspar, plagioclase and grey quartz comprise the bulk of the rock. Xenoliths of fine-grained diorite also occur.

The quarry is located 200 metres north of a main haulage road actively being used by the forest industry. A forest "buffer" about 100 to 200 metres in width shields the active area from the road. At present (August 1992), the quarry is L-shaped. Each side is about 3.6 to 4.2 metres in length and a maximum of 3.0 metres high. Fractures are evident, but are widely spaced and will permit extracting of blocks 1.5 metres on a side by 3.0 metres in length. The quarry face exhibits unhomogeneity of the rocks in the form of occasional dark inclusions and crosscutting dikes.

Quarry Pacific Industries Ltd. is test marketing the stone as tiles which are being produced at the Margranite Industry Ltd. facility in Surrey. Production statistics are not available.

Bibliography
EMPR OF 1994-1
EMPR PF (Notice of Work form - October 29, 1992; Claim map; Property
description; Prospectors Report 1998-4 by Helgi Sigurgeirson)
GSC MAP 1712A; 41-1989
GSC MEM 38
EMPR PFD 9436

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