MINFILE Mineral Inventory

MINFILE Record Summary

MINFILE No 092GNW009

File Created:	24-Jul-1985	by	BC Geological Survey (BCGS)
Last Edit:	22-Jul-2015	by	Karl A. Flower (KAF)

SUMMARY

Summary Help


		NMI
Name	MCNAB CREEK SLATE, HOWE SOUND, HOWE 1-3	Mining Division	Vancouver
		BCGS Map	092G053
Status	Past Producer	NTS Map	092G11W
Latitude	049º 33' 17''	UTM	10 (NAD 83)
Longitude	123º 24' 03''	Northing	5489202
		Easting	471009
Commodities	Slate, Flagstone, Dimension Stone, Building Stone	Deposit Types	R08 : Flagstone
Tectonic Belt	Coast Crystalline	Terrane	Gambier, Plutonic Rocks

Capsule Geology

The McNab Creek Slate quarry is located near the shoreline, west of McNab Creek, on the north shore of Thornbrough Channel, Howe Sound.

The area is underlain by Lower Cretaceous metavolcanic and metasedimentary rocks of the Gambier Group. These rocks form a roof pendant in Jurassic to Tertiary Coast Plutonic Complex quartz diorite.

Locally, dark grey to black slate was quarried for use as flagstone, asphalt roofing granules and filler.

The quarry was operated intermittently between 1947 and 1963 by Richmix Clays Ltd. of Vancouver, BC. A total of 12,531 tonnes of slate was mined between 1955 and 1963.

In 1995 and 1996, the area was prospected as the Howe 1 to 3 claims. This work indicated that the slate formation extends a minimum of 4.5 kilometres north from the shoreline and has a minimum width of 500 metres, east to west, with a 90 degree vertical dip.


Bibliography	EMPR AR 1947-221; 1954-A177; 1955-92; 1956-150; 1957-78; 1958-87; 1962-148; *1963-139 EMPR ASS RPT 24487 EMPR FIELDWORK 1980, pp. 165-178 GSC MAP 42-1963; 1386A GSC MEM 158 GSC OF 611 GSC P 89-1E, pp. 177-187; 90-1E, pp. 183-195; 90-1F, pp. 95-107 Ditson, G.M. (1978): Metallogeny of the Vancouver-Hope Area, British Columbia, M.Sc. Thesis, University of British Columbia EMPR PFD 507279