Ontario Geological Survey
Permanent Link to this Record:
MDI31F04SW00017
| Record Name(s) | Bronson Sillimanite - 1984, Bronson - 2000 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1984-May-29 |
| Date Last Modified | 2022-May-18 |
| Created By | |
| Revised By |
Primary Commodities: Sillimanite
Township or Area: Dungannon
Latitude: 45° 2' 34.04" Longitude: -77° 46' 36.9"
UTM Zone: 18 Easting: 281299.474 Northing: 4991455.383 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F04SW
Point Location Description: Dot symbol ' Sill ' just W of Bronson Lake and S of CNR.
Location Method: Conversion from MDI
Access Description: The deposit is exposed in a ridge 250 m N of a private road (just N of a grove of reforested pine) that leaves the Bronson Station-Detlor road 1.6 km E of Bronson Station. The 30 ft band of sillimanite-rich schist strikes E-W across lot 22, S of the CNR; 1 km S of the York River.
Province: Grenville
Geological Age: Mesoproterozoic
Dec 07, 2005 (C Papertzian) - This sillimanite-rich schist of the Hermon Formation is situated within the McArthur's Mills Shear Zone (characterized by E-W belts of marble and intercalated paragneiss). Sillimanite occurs in fibrous masses and knots and ranges from 15-25 % in grade. The main exposure of sillimanite gneiss is about 250 m long (25 % sillimanite at centre and 5-10 % at ends) and though is of small extent, this grade warrants economic interest.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 5 | Garnet | Economic | Ore | ||||
| 10 | Sillimanite | Economic | Ore |
Mono - Kyanite and sillimanite in Ontario
Publication Number: IMR004 Page: 7 Date: 1998
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of Dungannon and Mayo townships
Publication Number: ARV64-08 Page: 59 Date: 1998
Author: Hewitt D.F., James W.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geological series, industrial minerals of the Pembroke-Renfrew area, southern Ontario
Publication Number: P2209 Scale: 1:126,720 Date: 1980
Author: Vos M.A., Storey C.C.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Pembroke-Renfrew area, part 2
Publication Number: MDC022 Page: 189 Date: 1981
Author: Storey C.C., Vos M.A.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Algonquin region
Publication Number: OFR5425 Page: 262 Date: 1983
Author: Martin W.
Publisher Name: Ontario Geological Survey
Location:
Book - 1988, Sillimanite Report
Publication Number: Page: 49-53 Date: 1988
Author:
Publisher Name: Ontario Geological Survey
Location: Tweed RGP
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 Southern Ontario Resident Geologist District Office