MINFILE Mineral Inventory

MINFILE Record Summary

MINFILE No 092GNW099

File Created:	30-Apr-1999	by	Garry J. Payie (GJP)
Last Edit:	30-Apr-1999	by	Garry J. Payie (GJP)

SUMMARY

Summary Help


		NMI
Name	GARIBALDI OBSIDIAN	Mining Division	Vancouver
		BCGS Map	092G075
Status	Showing	NTS Map	092G14E
Latitude	049º 46' 00''	UTM	10 (NAD 83)
Longitude	123º 04' 00''	Northing	5512690
		Easting	495199
Commodities	Volcanic Glass, Pozzolan	Deposit Types	R : INDUSTRIAL ROCKS
Tectonic Belt	Coast Crystalline	Terrane	Plutonic Rocks

Capsule Geology

Obsidian from the Mount Garibaldi area is exposed about 15 kilometres northeast of Squamish. The obsidian is part of the Ring Creek lava flow and is dated as Late Wisconsin in age. The rock is pitchy, black in colour, strong and brittle and generally uniform. Microscopic examination indicated that the composition is (CANMET Investigative Report 78-206):

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90% glass

8% feldspar

1% muscovite

1% magnetite and hematite

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This obsidian is reported to have good potential as a pozzolan for use in the cement industry. It is considered that potential for similar obsidian deposit exists within the recent volanic flows of the area.


Bibliography	EMPR OF 1991-20; 1994-1 GSC MAP 42-1963; 1386A GSC OF 611 GSC P 90-1F, pp. 95-107 CANMET IR MRP/MSL *78-206, p. 5