Ontario Geological Survey
Permanent Link to this Record:
MDI52A10NE00003
| Record Name(s) | Diamond Willow - 1984, Noyes North - 1973, G. Noyes - 1973 |
|---|---|
| Related Record Type | Compound |
| Related Record(s) | |
| Record Status | Producing Mine |
| Date Created | 1984-Nov-02 |
| Date Last Modified | 2022-Feb-22 |
| Created By | |
| Revised By |
Primary Commodities: Amethyst
Secondary Commodities: Copper
Township or Area: McTavish
Latitude: 48° 41' 10.98" Longitude: -88° 39' 56.26"
UTM Zone: 16 Easting: 377411 Northing: 5393932 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A10NE
Point Location Description: and Google Earth
Location Method: Field Visit
Access Description: Highway 11/17 east to Road 5 North at Pearl, Ontario. Follow Road 5 North, take the first left after the railway tracks, and follow this road to the mine road, about 6km.
1973: staked by G. Noyes, who conducted stripping and trenching. 1984: claims went to lease. The mining leases were split in 1990 pending inheritance and the Diamond Willow and Blue Points mines are owned by a son (D. Noyes) and daughter (F. Grann) respectively. 2016: B. Leroux and C. Fayle conducted prospecting. 2018: B. Leroux conducted prospecting, stripping, pitting, and trenching.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.57109 | 20000014299 | 20000014299 |
| 34785 | 20000016978 | 20000016978 |
Province: Southern
Subprovince: Nipigon Basin
Formation Group: Sibley Group
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Terrigenous-Clastic-Unsubdivided | 1 |
|---|---|---|---|---|
| Breccia-unsubdivided | 2 | Is |
Feb 25, 2020 (Q Unknown) - Amethyst occurs over a length of 1/2 miles in a vertically dipping fault zone that strikes N70E, at the contact of red Archean granite, and dolomite and argellite of the Sibley formation. The strike of the veins varies from N45E to N60E and the measured width of the mineralization varies from 50 to 67 feet. 'Angular fragments of dolomite and granite are enclosed by vein matter. A very minor amount of pyrite and chalcopyrite also occurs. Adjacent to the fault, the granite is altered and epidotized and has a radioactive count of no more than 1.5 times background.' (Kustra, 1969, p.44).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Amethyst | Economic | Ore | ||||
| 2 | Galena | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Pyrite | Economic | Ore |
Feb 25, 2020 (Therese Pettigrew) - The Diamond Willow amethyst mine is situated on the same amethyst vein system as the Blue Points mine, and the two mines are less than a kilometre apart (Garland, 1992). The Diamond Willow mine is at the western end of a kilometer-long fault breccia zone, separating Sibley Group mudstones on the south from Sibley Group conglomerates on the north side. The trend of the fault zone is 090. Both the mudstone and conglomerate are well layered, giving them a blocky appearance. The breccia has a quartz-rich core with fragment density increasing towards the wall rocks. Fragments are angular and representative of the wall rocks. Amethyst forms pale to medium purple crystals within cavities in the breccia. Vugs can attain sizes over 1 m and are lined with large, dark purple crystal points. The vugs also tend to be filled with a dense, red clay. Galena occurs as seams of crystals 1 cm in size, within the quartz at the west end of the exposed breccia zone. The Diamond Willow pit is 70 m long and up to 10 m wide and 2.5 m deep. The original Diamond Willow pit, now shared with the Blue Points mine, is 60 m long, close to 10 m wide, and 4 m deep (Garland, 1994). Galena occurs with the early quartz, in seams composed of individual crystals, between early quartz and a later generation of amethyst.
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1989 | 30 | MP147 p. 164 | ||
| 1990 | 35 | MP152 p. 108 | ||
| 1988 | 35 | MP142 p. 162 | ||
| 1991 | 25 | MP158 p. 184 |
Map - Geological series, McTavish Township (west part of north half), District of Thunder Bay
Publication Number: P0720 Scale: 1:15,840 Date: 1997
Author: McIlwaine W.H.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Mono - Amethyst in the Thunder Bay Area
Publication Number: OFR5891 Scale: Date: 1994
Author: Garland M.I.
Publisher Name: Ontario Geological Survey
Location:
Mono - Industrial minerals of northern Ontario-supplement 1
Publication Number: OFR5388 Scale: Date: 1982
Author: Vos M.A., Abolins T., Smith V.
Publisher Name: Ontario Geological Survey
Location:
Article - Amethyst in northwestern Ontario-1991
Publication Number: MP158.009 Scale: Date: 1997
Author: Garland M.I.
Publisher Name: Ontario Geological Survey
Location:
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