MINFILE Mineral Inventory

MINFILE Record Summary

MINFILE No 103P 112

File Created:	24-Jul-1985	by	BC Geological Survey (BCGS)
Last Edit:	12-Apr-2012	by	George Owsiacki (GO)

SUMMARY

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		NMI	103P5 Sia4
Name	MACY, MACEY, QUARTZ	Mining Division	Skeena
		BCGS Map	103P043
Status	Past Producer	NTS Map	103P05E
Latitude	055º 26' 18''	UTM	09 (NAD 83)
Longitude	129º 30' 13''	Northing	6143686
		Easting	468137
Commodities	Silica	Deposit Types	I07 : Silica veins
Tectonic Belt	Intermontane	Terrane	Stikine, Bowser Lake

Capsule Geology

The Macy mine is located on the south side of Alice Arm of Observatory Inlet, about 5.0 kilometres south of the Alice Arm townsite. The mine, in the past, produced silica flux for the copper smelter at Anyox (103P 021).

The deposit is hosted in a sequence of Middle Jurassic to Upper Cretaceous Bowser Lake Group sediments. These rocks have been regionally metamorphosed to greenschist facies and contact metamorphosed to biotite hornfels to the west along the contact with the Tertiary Coast Plutonic Complex.

The Macy mine is developed in biotite hornfelsed shale, siltstone and wacke. Large bodies of barren quartz were mined here from opencuts in 1916 and 1917 and from underground workings in 1918 and 1920 for silica flux. Silica production for 1918 is included with Granby Point (103P 022).


Bibliography	EMPR AR 1917-F370; 1918-K55,K394; 1964-24,25 EMPR BULL 63 EMPR FIELDWORK 1985, pp. 219-224; 1988, pp. 233-240; 1990, pp. 235-243; 2005, pp. 1-4 EMPR MAP 8 EMPR ASS RPT 29106 EMPR OF 1986-2; *1987-15, p. 35, Fig.33; 1994-14 GSC MAP 307A; 315A; 1385A GSC MEM 175, p. 71 GSC OF 864; 3272 CIM SPEC VOL 15, p. 462