GeologyOntario has moved. You will be redirected to the new site in 10 seconds. If you are not immediately redirected please follow the below link to the new GeologyOntario platform. For assistance please contact us.
Ontario Geological Survey
Permanent Link to this Record:
MDI31F04SW00071
| Record Name(s) | Lily Robertson - 1990, Lily Robertson Cooney - 2000, Black Star Corundum - 2000, Lily Robertson Hill - 2000, Lily Robertson Corundum - 2000, Cooney - 2000 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1990-Nov-16 |
| Date Last Modified | 2024-Jul-19 |
| Created By | |
| Revised By |
Primary Commodities: Corundum
Township or Area: Dungannon
Latitude: 45° 4' 3.23" Longitude: -77° 48' 34.1"
UTM Zone: 18 Easting: 278831.05 Northing: 4994296.155 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F04SW
Point Location Description: Property symbol ' PP ', 0.6 km E of Colston Lake.
Location Method: Conversion from MDI
Access Description: This is not a mineral collecting site. This occurrence is on private property, no trespassing permitted.
Mineral location - black corundum. 1947-8 : opened by L. Moyd on the NW slope of Robertson Hill. There are 10 pits. The best showing was in a stripping about 50 ft N of the S pit (1960). OGS 39-6 (1930) describes the Cooney property where some work was carried out on a pegmatite dyke on the N half of lot 26, con 13. Sodalite is associated with cancrinite and hydronephelite (?). The Lily Robertson and Cooney farms are referred to as one in the literature, but the mineralogy seems to be different. So they are probably 2 separate but closely-connected sites.
Province: Grenville
Geological Age: Mesoproterozoic
Dec 07, 2005 (C Papertzian) - Pegmatitic nepheline, albite and corundum (up to 30 %) occur as patchy segregations in a nepheline-plagioclase gneiss. Most corundum is 1/4-3/4 inch long but some reach 3 inches. The corundum exhibits asterism when cut in the cabochon style, yielding star sapphire. The deposit has and exposed length of 200 ft and a width of 10 ft.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 5 | Corundum | Economic | Ore | ||||
| 10 | Magnetite | Economic | Ore | ||||
| 15 | Nepheline | Economic | Ore | ||||
| 20 | Scapolite | Economic | Ore | ||||
| 25 | Spinel | Economic | Ore |
Part - Non-metallic mineral resources of Hastings County
Publication Number: ARV39-06.003 Page: 45-46 Date: 1998
Author: Osborne F.F.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of Dungannon and Mayo townships
Publication Number: ARV64-08 Page: 49 Date: 1998
Author: Hewitt D.F., James W.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - A catalogue of the Ontario localities represented by the mineral collection of the Royal Ontario Museum
Publication Number: MP070 Page: 124-5 Date: 1977
Author: Satterly J.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Algonquin region
Publication Number: OFR5425 Page: 35,265 Date: 1983
Author: Martin W.
Publisher Name: Ontario Geological Survey
Location:
Mono - A catalogue of the Ontario localities represented by the mineral collection of the Royal Ontario Museum
Publication Number: MP070 Page: 125 Date: 1977
Author: Satterly J.
Publisher Name: Ontario Geological Survey
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 Southern Ontario Resident Geologist District Office