Ontario Geological Survey
Permanent Link to this Record:
MDI42F04NW00013
| Record Name(s) | Willroy Zone 1 - 1957 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Past Producing Mine With Reserves or Resources |
| Date Created | 1991-Mar-26 |
| Date Last Modified | 2022-Mar-08 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Zinc, Silver
Secondary Commodities: Gold, Lead, Sulphur/Pyrite
Township or Area: Gemmell
Latitude: 49° 9' 23.1" Longitude: -85° 48' 44.83"
UTM Zone: 16 Easting: 586587 Northing: 5445523 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42F04NW
Point Location Description: stope to surface
Location Method: AMIS Site Visit
Access Description: ~4km north of Manitouwadge and ~1km east of the Main Zone along strike to the surface mineralization. access by gravel road which runs east from the old mill and rail loading area at the main Willroy Mine site. The road cuts diagonally south and east from the old rail bed. Road access leads around the south edge of the fence line securing the No.1 Zone perimeter.
1953: Surface work by prospectors R. Barker and W. Dawd. 1954-56: Willroy Mines Ltd. acquired the property and conducted considerable diamond drilling and an EM survey. 1955-57: Willroy Mines Ltd. conducted shaft sinking, underground development, and erection of surface plant facilities. Underground development included sinking of the No. 1 production shaft to a depth of 2855 feet opening 16 working levels and sinking of the No. 2 ventilation shaft to 530 ft. 1957: Production commenced with a 1000 tons per day mill. 1957-77: Production continued. No exploration by Willroy Mines after 1970. 1975: Willroy Mine closed. 1990: Noranda Inc. conducted underground diamond drilling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.V1 | 42F04NE9666 | 42F04NE9666 |
| 35 | 42F04NW0063 | 42F04NW0063 |
| 63.476 | 42F04NE0061 | 42F04NE0061 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Gneiss-Unsubdivided | 1 | Biotite-Quartz-Feldspar |
|---|---|---|---|---|
| Schist-Unsubdivided | 1 | Biotite-Sillimanite-Muscovite-Quartz | Host | |
| Ironstone-unsubdivided | 2 | Host | ||
| Gneiss-Unsubdivided | 2 | Biotite | Adjacent | |
| Terrigenous-Clastic-Unsubdivided | 3 | |||
| Pegmatite | 3 | Biotite | Intrudes |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrrhotite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Sphalerite | Economic | Ore | ||||
| 5 | Galena | Economic | Ore | ||||
| 6 | Magnetite | Economic | Ore | ||||
| 1 | Garnet | Economic | Gangue | ||||
| 2 | Anthophyllite | Economic | Gangue | ||||
| 3 | Cordierite | Economic | Gangue | ||||
| 4 | Quartz | Economic | Gangue | ||||
| 5 | Biotite | Economic | Gangue | ||||
| 6 | Sillimanite | Economic | Gangue |
Mar 14, 2016 (Therese Pettigrew) - The area is predominantly underlain by biotite-quartz-feldspar gneiss interlayered with bands of biotite gneiss and quartz-feldspar gneiss. Granite gneiss occurs in the extreme north. In the east, the metasediments strike N80W and dip vertically. To the west, the metasediments curve northward until they strike N65W and dip 30-50 NE. The apparent pitch of the formations is 30-40E. All orebodies occur within the metasediments along E-striking shear zones, which parallel the granite contact. They are lensoid, show similar attitudes in strike and dip, plunge E at shallow angles and replace either iron formation or sericite schist. The No. 1 zone consists of the north and south orebodies. The north orebody is mineralized with massive chalcopyrite with some pyrrhotite in stringers in quartz and silicified biotite schist. The south orebody consists of lenses of disseminated chalcopyrite and pyrrhotite contained within an 80-foot width of sericite-biotite schist. The No. 2 orebody is made up of semi-massive sphalerite and pyrite with subordinate pyrrhotite and galena, which replaced iron formation. The orebody strikes E-W, dips 75-85N and plunges 11E. The main, No. 3 zone is a lenticular body of pyrite, pyrrhotite, sphalerite, chalcopyrite and galena contained in and which replaced iron formation. It strikes E-W, dips 70N and plunges 44E. The No. 4 orebody is lenticular, strikes E-W and plunges E at a shallow angle. It is contained within and replaced iron formation. Mineralization consists of massive sphalerite with massive to disseminated pyrrhotite, pyrite and galena.
| Rank | Classification |
|---|---|
| 1 | VMS Base Metal |
| Rank | Characteristic |
|---|---|
| 1 | Stratiform |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Willroy Mine | 1976 | Possible | 759448 | Wilroy Mines Ltd. Annual Report 1976 | Willecho and Wilroy combined | Copper 0.28 Percent, Silver 1.47 Ounce per Ton, Zinc 4.42 Percent |
| Willroy | 1967 | Unclassified | 458990 | Canadian Mines Handbook, 1968-69, p. 347 | 505,952 tons grading 1.1% Cu, 1.91% Zn, 0.01% Pb, 0.68 oz/t Ag | Copper 1.1 Percent, Lead 0.01 Percent, Silver 0.68 Ounce per Ton, Zinc 1.91 Percent |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1975 | 3792936 | OFR6282 | 4180996.7 tons @1.25% Cu, 5.74% Zn and 1.70 oz/t Ag |
Part - Geology of the Manitouwadge area
Publication Number: ARV66-08 Scale: Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Scale: Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Winston Lake and Manitouwadge Revisted: Modern Views of Two Volcanogenic Massive Sulphide (VMS)-Endowed Greenstone Belts. A Field Trip Guidebook
Publication Number: OFR6282 Scale: Date: 2012
Author: Lodge R.W.D.
Publisher Name: Ontario Geological Survey
Location:
Map - Manitouwadge area, District of Thunder Bay, Ontario
Publication Number: M1957-08 Scale: 1:31,680 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Mineral Occurrences in the Manitouwadge Area, Volumes 1, 2 and 3
Publication Number: OFR5906 Scale: Date: 1994
Author: McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
Map - Mapledoram-Gemmell, Thunder Bay District
Publication Number: M2280 Scale: 1:12,000 Date: 1974
Author: Milne V.G.
Publisher Name: Ontario Division of Mines
Location:
Map - Manitouwadge area, District of Thunder Bay, Ontario
Publication Number: M1957-08 Scale: 1:31,680 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Manitouwadge sheet, districts of Thunder Bay and Algoma, geological compilation series
Publication Number: P0494 Scale: 1:126,720 Date: 1997
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office