Mineral Deposit Inventory for Ontario

Ministry of Energy, Northern Development and Mines

Deposit: MDI41I05NE00009


Mineral Deposit Identification
Deposit Name(s) Agnew Lake Mine - 1966, Canadian Thorium Corporation Limited Property - 1965
Related Deposit Type compound
Deposit Status past producing mine with reserves
Date Created 1985-May-30
Date Last Modified 2010-Oct-22
Created By Q Unknown
Revised By A Wilson


Primary Commodities: uranium, thorium

Secondary Commodities: yttrium


Township or Area: Hyman

Latitude: 46° 25' 57.85"    Longitude: 81° 37' 29.65"

UTM Zone: 17    Easting: 451991   Northing: 5142319    UTM Datum: NAD83

Resident Geologist District: Sudbury

NTS Grid: 41I05NE

Point Location Description: shaft

Location Method: amis site visit

Access Description: Starting at Nairn Centre at highway 17, follow Spanish River Road, drive 8.2km northeastwards to level crossing at Turbine; turn west onto High Falls road, drive 2.8km northwest.

Exploration and Mining History

1954-55: New Thurbois Mines Ltd. - DD- 90-32 902 ft. 1956: Canadian Thorium Corporation Ltd. - property acquired, mapping ground geophysics 1965-67: Quebec Mattagami Minerals and Kerr Addison Mines Ltd. - property development, mapping, DD-21,400 ft. 1967-83: Agnew Lake Mines Limited - property transferred.; property development and mining, between 1974 and 75 experimental bacteria leaching of a stockpile was tested; leaching continued for period 1981-83.

Assessment Work on File

Assessment Work on File
Office File Number   Online Assessment File Identifier   Online Assessment File Directory  
Hyman 33A1     41I05NE0058     Open
Hyman-0031C1     41I05NE006    
Hyman-0034A1     41I05NE0067     Open
Hyman 0032A1     41I05NE007    
HYMAN-0015     41I05NE0050     Open


Province: Southern

Mineral Deposit Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
quartzite 1 adjacent
conglomerate 2 host

Lithology Comments

10/14/2010 (A Wilson) - Mineralization is hosted in the Mississagi quartz-pebble conglomerate interbedded with sericitic argillite and quartzite. These rocks unconformably overlie Archean granite basement. The sedimentary rocks are east-trending and have a steep dip to the south.


Deposit Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Habit Description
1 uranothorite economic ore
2 monazite economic ore
3 uraninite economic ore
5 pyrrhotite economic ore
4 pyrite economic gangue

Mineralization Comments

10/14/2010 (A Wilson) - Four ore zones were identified. The average true width of the ore zones is 9.2 feet.

Mineral Deposit Details

Deposit Classification
Rank Classification            
1 paleoplacer
Production Data
Year Tonnes Commodities Commodity Production Reference Comment
1985 646 Uranium 1424924 Pounds Amis Report 05308 A total of 1,424,924 lbs U was reportedly recovered from the mine between 1977-80
Ore Reserves Data
Zone Year Category Tonnes Reference Comments Commodities
Agnew Lake 1967 unclassified 9463751 Quebec Mattagami Minerals annual report 1967 (drill indicated) 10,432,000 tons averaging 1.54 lb/t U3O8 for a total of 16,022,000 pounds U3O8. Uranium 1.54 Pounds per Ton
Agnew Lake 1980 unclassified 5264393 MRC025 p. 106 Proven and probable Uranium 1 Pounds per Ton



Publication Number: M2055    Scale: 1:31 680    Date: 1965

Publisher Name: OGS


Publication Number: P0133    Scale: 1:15 840    Date: 1962

Publisher Name: OGS

Book - OFR 1087

Publication Number: OF1087    Date: 1985

Publisher Name: GSC

Book - Uranium and thorium deposits at the base of the Huronian system in the District of Sudbury, p. 22-24

Publication Number: R001    Date: 1960

Author: J. E. Thomson

Publisher Name: OGS

Book - Uranium and thorium depsoits of Northern Ontario, p. 74-75

Publication Number: MRC009    Date: 1968

Author: J. A. Robertson

Publisher Name: OGS

Book - Geology of the Sudbury-Manitoulin area, p. 210-11

Publication Number: R166    Date: 1978

Author: K. D. Card

Publisher Name: OGS

Book - Uranium and thorium deposits of Northern Ontario, p. 106

Publication Number: MDC025    Date: 1983

Author: J. A. Robertson and K. L. Gould

Publisher Name: OGS


Publication Number: GDIF282    Date: 1985

Reference Location: OGS

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Ministry Contact Information

For detailed information regarding this mineral deposit please contact the Sudbury Resident Geologist District Office