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Ontario Geological Survey
Permanent Link to this Record:
MDI31F04SW00036
| Record Name(s) | Greyhawk Mine - 2000, Greyhawk - 1984 |
|---|---|
| Related Record Type | Compound |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 1984-Sep-21 |
| Date Last Modified | 2023-Jun-19 |
| Created By | |
| Revised By |
Primary Commodities: Uranium
Secondary Commodities: Thorium
Township or Area: Faraday
Latitude: 45° 1' 54.32" Longitude: -77° 53' 43.89"
UTM Zone: 18 Easting: 271914.324 Northing: 4990557.293 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F04SW
Point Location Description: U property symbol ' 43 ' just E of Siddon Lake, near Hwy 28, lot 10. con 12.
Location Method: Conversion from MDI
Access Description: 4 km S of Bancroft on Hwy 28, a gravel road heads S for 240 m to the end of the road and the mine dumps.
Mineral location : peristerite with magnetite, titanite, apatite, zircon, epidote, allanite, uranothorite, uraninite, pyrochlore, pyrite in pegmatite and titanite, tourmaline, microcline, apatite and clinozoisite in the amphibolite. 1954 : Goldhawk Porcupine Mines Ltd (later Goldhawk Uranium Mines Ltd) carried out scint and geology surveys and drilled a zone 2,000 ft long to a depth of 450 ft. 1955-6 : a vertical, 3-compartment shaft was sunk to 361 ft (by Greyhawk Uranium Mines Ltd), establishing 3 levels at 110, 211 and 333 feet. Surface drillling of 114 holes (42,299 ft) was carried out. By the end of 1956 there was 430 ft of underground cross-cutting, 1,606 ft of drifting and 512 ft of raising, all on the first level. Underground drilling amounted to 10,542 ft in 76 holes. The shaft was sunk to 402 ft in 1958 and deeper levels established. 1957-9 : the Faraday Uranium Mill was used to process the ore. 80,247 tons of ore, grading 0.069 % U3O8, were extracted from this property. 1962 : the property was taken over by Faraday Uranium Mines Ltd. At the time of closure there was a total of : 5,965 ft of drifting, 1,655 ft of crosscutting and 2,294 ft of raising. Reserves of 200,000 tons, averaging 0.065 % U3O8 remain. 1975 : Madawaska Mines Ltd was formed to take over and operate the Faraday Mine, including Greyhawk.
Province: Grenville
Geological Age: Mesoproterozoic
Dec 07, 2005 (C Papertzian) - Granite pegmatite intrudes amphibolite (metagabbro) with minor amphibolite gneiss, biotite paragneiss and biotite schist. The pegmatites vary considerably in size and shape and intrude along fractures and breccia zones within the metagabbro. Ore shoots, averaging 100 x 6 ft, occur in magnetite-rich pegmatite and quartz-rich leucogranite. The ore minerals are uraninite and uranothorite while other radioactive minerals are allanite, pyrochlore and cyrtolite. High grade mineralization occurs where the host rock is richer in mafic minerals and more fractured. High-grade areas are accompanied by deep-red colouration due to hematization. See OGS, 1981 for a summary.
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Pegmatite | Contains |
|---|---|---|---|---|
| Skarn | 2 | Skarn | Contains |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 5 | Allanite | Economic | Ore | ||||
| 10 | Cyrtolite | Economic | Ore | ||||
| 15 | Hematite | Economic | Ore | ||||
| 20 | Magnetite | Economic | Ore | ||||
| 25 | Pyrochlore | Economic | Ore | ||||
| 30 | Tourmaline | Economic | Ore | ||||
| 35 | Titanite | Economic | Ore | ||||
| 40 | Uraninite | Economic | Ore | ||||
| 45 | Uranothorite | Economic | Ore | ||||
| 50 | Zircon | Economic | Ore |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Greyhawk | 1959 | Unclassified | 181237 | Reserves of 200,000 tons, averaging 0.065 % U3O8 remain | Uranium 0.065 % | |
| Greyhawk | 1958 | Inferred Mineral Resource | 725600 | Canadian Mines Handbook 1958 | 0.095% U3O8 | Uranium .095 % |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1959 | 72799 |
Uranium .07 Percent (%) |
SMDR 000248 |
Part - Radioactive mineral occurrences in the Bancroft area
Publication Number: ARV65-06 Page: 117-121 Date: 1998
Author: Satterly J., Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Uranium and thorium deposits of southern Ontario
Publication Number: MDC004 Page: 38-39 Date: 1967
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geological series, radioactive mineral deposits of the Pembroke-Renfrew area, southern Ontario
Publication Number: P2210 Scale: 1:126,720 Date: 1980
Author: Masson S.L., Gordon J.B., Storey C.C.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Radioactive mineral deposits of the Pembroke-Renfrew area
Publication Number: MDC023 Page: 62 Date: 1981
Author: Masson S.L., Gordon J.B.
Publisher Name: Ontario Geological Survey
Location:
Mono - Uranium and thorium deposits of southern Ontario
Publication Number: OFR5311 Page: 225-6 Date: 1981
Author: Gordon J.B., Rybak U.C., Robertson J.A.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Algonquin region
Publication Number: OFR5425 Page: 249 Date: 1983
Author: Martin W.
Publisher Name: Ontario Geological Survey
Location:
Mono - Granitic pegmatites of the Bancroft area, southeastern Ontario
Publication Number: OFR5717 Page: 120-121 Date: 1990
Author: Goad B.E.
Publisher Name: Ontario Geological Survey
Location:
Book - Canadian deposits of uranium and thorium; Geological Survey of Canada, Economic Geology Series 16
Publication Number: Econ Geol 16 Page: 186 Date: 1962
Author: Lang, A H; Griffith, J W; Steacy, H R
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102450
Mono - A catalogue of the Ontario localities represented by the mineral collection of the Royal Ontario Museum
Publication Number: MP070 Page: 219,299,300,400 Date: 1977
Author: Satterly J.
Publisher Name: Ontario Geological Survey
Location:
Publication - Rock and mineral collecting in Canada, volume II: Ontario and Quebec; Geological Survey of Canada, Miscellaneous Report 8
Publication Number: GSC MR 8 Page: 73-74 Date: 1964
Author: Sabina, A P
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/119882
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