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Ontario Geological Survey
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MDI31F05SE00006
| Record Name(s) | Craigmont Mine - 1900, Manufacturers Corundum Company - 1984, Craig Mine - 1944, Craigmont Workings - 1953 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Past Producing Mine With Reserves or Resources |
| Date Created | 1984-May-29 |
| Date Last Modified | 2023-Aug-03 |
| Created By | |
| Revised By |
Primary Commodities: Corundum
Secondary Commodities: Thorium, Molybdenum, Uranium
Township or Area: Raglan
Latitude: 45° 18' 2.88" Longitude: -77° 36' 45.18"
UTM Zone: 18 Easting: 295172.001 Northing: 5019686.996 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F05SE
Point Location Description: adit
Location Method: AMIS Site Visit
Access Description: Take highway 517 south 9.3km to Craigmont Road go left and keep left along foot of mountain pass red cabin on right. After 2.1km go 100m parking on left at old mill foundations. Follow ATV trail up hill.
1899: Property was leased to J.H. Shewstone and B.A.C. Craig of the Canada Corundum Company. 1900-1908: Canada Corundum Company - mining. A 200 ton mill was installed in 1903 and operations continued until 1908. 1908-13: Canada Corundum Company was reorganized as the Manufacturers Corundum Company: production continues. 1913: Hamilton Corundum Company: prospecting. 1915: Manufacturers Corundum Company - prospecting, DD. 1919-1921: Corundum Limited leased the property and built a mill to treat tailings until 1921. 1944 - 1946: the Wartime Metals Corporation operated a 200 ton plant to treat tailings.
Province: Grenville
Subprovince: Central Metasedimentary Belt
Geological Age: Mesoproterozoic
Jun 30, 2011 (C Papertzian) - H.D. Carlson described the geology as follows: 'The rocks exposed in the Klondike and Craigmont cuts may be divided into the following groups: 1) granite and syenite pegmatites 2) Granite Gneiss 3) Syenite Gneiss a) quartz-albite syenite with arfvedsonite b) Hybrid, pink-buff alkaline syenites 4) Leucocratic nepheline gneiss 5) Scapolite gneiss 6) Oligoclase-andesine gneiss (grey alkaline syenite) 7) Amphibolites. Corundum is found in the nepheline gneiss, the scapolite gneiss, the oligoclase-andesine gneiss and in hybrid altered facies of these rocks, which occur along their contacts with the hybrid pink-buff alkaline syenites. All these rocks, except the pegmatites and the arfvedsonite syenite, have for the most part, gneissic fabrics and occur in irregular bands conformably intercalated with one another. The attitude of the banded structure of the sequence is roughly parallel t the southern slope of Robillard Mountain; in general it strikes a little north of west and dips from 20 to 40 degrees south, the average dip being about 30 degrees, with minor, local open folding evident in some places.' Hewitt describes the corundum as follows: 'It occurs both as round anhedral porphyroblastic grains and stubby euhedral, hexagonal, barrel-shaped crystals. The colour ranges from bronze to green todark grey. The grains range from 1 mm to 8 cm in size. Thin mantles of muscovite frequently surround the corundum. The following accessory minerals can be found in the corundum-bearing rocks; biotite, hornblende, pyroxene, muscovite, sphene (titanite), apatite, zircon, carbonate, sericite, chlorite, epidote, garnet, pyrite, zeolites, magnesite, and ilmenite. The nepheline gneiss contains a few grains of sodalite.'
| Rock Type | Rank | Composition | Texture | Relationship | Gneiss-Unsubdivided | 1 | Syenite | Contains |
|---|---|---|---|---|
| Gneiss-Unsubdivided | 2 | Nepheline Syenite | Contains | |
| Pegmatite | 3 | Granite | Contains |
Jun 30, 2011 (A Wilson) - Corundum was mined from more than 20 cuts on the south slope of the hill and from 11 cuts on the west side of the hill. At the Craigmont workings an adit 220 feet long was driven northward into the side of the hill; an irregular drift trends westward from the end of the adit for 150 feet and then southward for 70 feet.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Corundum | Economic | Ore | ||||
| 2 | Garnet | Economic | Ore | ||||
| 3 | Molybdenite | Economic | Ore | ||||
| 4 | Muscovite | Economic | Ore | ||||
| 5 | Allanite | Economic | Ore | ||||
| 6 | Euxenite | Economic | Ore | ||||
| 7 | Pyrite | Economic | Ore |
Jun 30, 2011 (A Wilson) - Corundum occurs as grains less than ¼ up to crystals 3 inches across. Corundum forms between 5 and 25% of the host rock. Magnetite occurs as irregular splashes in the corundum zones and also as stringers with or without pyrite. Garnet occurs as crushed rounded crystals as much as 1 inch across. Molybdenite occurs in rare large flakes and muscovite occurs as small to large books, frequently in association with corundum. A grab sample containing allanite, collected by the OGS in 1977 returned 20 ppm U3O8 and 504 ppm Th.
Date: Jan 21, 2005
Geologist: C Papertzian
Notes: This property was visited on April 21st, 2004 for a day. Numerous open cuts (greater than 20) along with 2 large pits (main workings), one of which is 500 feet long, up to 100 feet in width and a maximum depth of 50 feet were looked at. The Klondike workings were also investigated and the largest opening there measured 320 feet long with a maximum width of 100 feet and a maximum depth of 60 feet. Most of the cuts are 15 to 20 feet long and 2 to 10 feet deep. Generally the workings are water filled and largely overgrown. No major hazards were evident at the pits. There was also an adit associated with the property that was not investigated at this time. It is reported to be 220 feet long, initially trending north, then west for approximately 150 feet before turning southward for another 70 feet and finally trending to the northwest for anther 50 feet. Some slashes were removed from the walls of the drift. Production from 1900 to 1941 was 20,758 tons of corundum at a value of $1,224,473. In 1949, L. Moyd estimated that only 10% of the deposit had been mined. He anticipated that 3 million tons remained and from that, 200,000 tons of concentrate could be produced at a grade of 6.6%. The corundum content of the ore was highly variable and only the richest areas were extracted close to the surface.
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Craigmont | 1949 | Probable | 2721582 | MDC 22, P31 | Grade 6.6% | Corundum 6.6 % |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1949 | 291435 | MDC 22, P35 | 18831 tonnes of graded material produced |
Publication - Geology of the Haliburton and Bancroft areas, Province of Ontario; Geological Survey of Canada, Memoir no. 6
Publication Number: GSC Memoir 6 Page: 304-315, 371-375 Date: 1910
Author: Adams, F D, Barlow, A E.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100481
Book - Rare-element minerals of Canada; Geological Survey of Canada, Economic Geology Series 11
Publication Number: EconGeol 11 Page: 230-231 Date: 1932
Author: Ellsworth, H V
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102445
Publication - Rocks and Minerals for the Collector, Ottawa to North Bay, Ontario; Hull to Waltham, Quebec; Geological Survey of Canada, Paper no. 70-50
Publication Number: Paper 70-50 Page: 43-45 Date: 1971
Author: Sabina, A.P.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102463
Part - Geology of the Brudenell-Raglan area
Publication Number: ARV62-05 Page: 56-59, 102-16 Date: 1998
Author: Hewitt D.F., Carlson H.D.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Mineral occurrences in the Renfrew area
Publication Number: ARV53-03 Page: 27, 32-33 Date: 1998
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Columbium (niobium) deposits of Ontario
Publication Number: MDC014 Page: 51 Date: 1971
Author: Ferguson S.A.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
MonoMap - Geology of base metal, precious metal, iron, and molybdenum deposits in the Pembroke-Renfrew area
Publication Number: MDC020 Page: 170-171 Date: 1980
Author: Carter T.R., Colvine A.C., Meyn H.D.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Pembroke-Renfrew area, part 2
Publication Number: MDC022 Page: 31-35, 199 Date: 1981
Author: Storey C.C., Vos M.A.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Radioactive mineral deposits of the Pembroke-Renfrew area
Publication Number: MDC023 Page: 123 Date: 1981
Author: Masson S.L., Gordon J.B.
Publisher Name: Ontario Geological Survey
Location:
Map - Brudenell-Raglan area, County of Renfrew, Ontario
Publication Number: M1953-02 Scale: 1:63,360 Date: 1997
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Industrial minerals of the Algonquin region
Publication Number: OFR5425 Page: 608 Date: 1983
Author: Martin W.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology, Barry's Bay Area
Publication Number: P3444 Scale: 1:50,000 Date: 2001
Author: Easton R.M.
Publisher Name: Ontario Geological Survey
Location:
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