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Globe Graphite mine, Elmsley Township, Lanark Co., Ontario, Canada

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This was the first graphite mine in Ontario.
History:
1871-5 - the International Mining Co.
1893 - Northern Graphite Co.
1901 - R.A. Pyne
1902-3 - R. McConnell
1908-11 - Globe Refining Co.
1915-1916 - Globe Graphite Refining and Milling Co.
1916-1919 - Globe Graphite Mining and Refining Co.
1983-4 : Black Gregor Explorations Inc (Bowdidge and Associates) carried out geology, mag, E.M., an SP survey and drilling (4 DDH, 1,099 ft) on the property.

Workings consisted of the main pit, 400 x 10-30 ft; a shaft which was sunk at the NE end of the pit (250 ft deep with 4 levels at 100, 150, 200 and 250 ft. These extended about 200 ft in each direction along strike); a second shaft (1916) which was sunk to 106 ft at a point 400 ft NW of the main shaft. Some drifting was carried out at 50 and 1000 ft. There was also a third pit.

Geology:

The property is located within an inlier of Grenville rocks surrounded by Paleozoic sandstone. The deposit is hosted in marble (white, well-banded) and calc-silicates (diopside-pyroxenite to diopside and calcite-bearing feldspathic gneisses). The orebody forms a saddle-shaped mass in highly silicated marble intruded by pegmatites (gabbro to syenite) and may be the result of contact metamorphism. Graphite content increases with silicates. The main ore zone has been traced for 400 ft on the dragfolded N limb of a steeply plunging antiform. The ore appears to occur in 2 lens-like bodies (1942), the E one being about 250 x 7-10 ft and nearly 40 ft thick on the crest of the antiform. The W lens is 4 ft thick for about 70 ft then 8 ft thick for 90 ft. The zone S of the pit is structurally complex. The graphite is predominantly flake (0.5-1.0 mm) with small bodies of ' needle ' flake. There may be 4 zones of mineralization where up to 20 % graphite is separated by medium to low grade bands. Mineralization extends to at least 300 ft deep, but the thickness, strike length and grade appear to be somewhat less than at surface where up to 15 % graphite was reported over 40 ft.

Mineral List



6 entries listed. 5 valid minerals.

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References

Hewitt, D. F. (1965) Graphite in Ontario. Industrial Minerals Report No. 20, Ontario Department of Mines
MDI Number: MDI31C16SE00016
Ann P.Sabina (1983), Rocks and Minerals for the Collector; Kingston,Ontario to Lac St.Jean, Quebec. GSC Misc. Report 32, p.31

 
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