Ontario Geological Survey
Permanent Link to this Record:
MDI000000002313
| Record Name(s) | Snowbank Pegmatite - 2018 |
|---|---|
| Related Record Type | |
| Record Status | Occurrence |
| Date Created | 2019-Jul-29 |
| Date Last Modified | 2021-Nov-30 |
| Created By | Therese Pettigrew |
| Revised By | Therese Pettigrew |
Primary Commodities: Lithium
Township or Area: Paterson Lake Area
Latitude: 50° 16' 52.71" Longitude: -94° 32' 41.2"
UTM Zone: 15 Easting: 389940 Northing: 5571050 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52L07SE
Point Location Description: OGS staff field visit
Location Method: Field Visit with GPS
2018: Avalon Advanced Materials Inc. carried out prospecting, mapping, sampling, and channel sampling.
Province: Superior
Subprovince: English River
Belt: Separation Lake
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Is |
|---|
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Petalite | Economic | Ore | ||||
| 1 | Feldspar | Economic | Gangue | ||||
| 2 | Albite | Economic | Gangue | ||||
| 3 | Quartz | Economic | Gangue |
Jul 29, 2019 (Therese Pettigrew) - The Snowbank Pegmatite was discovered in a large outcrop area traceable for 127 m along strike (open under overburden at both ends) averaging 6 m wide. The lithium occurs primarily in the ore mineral petalite, which occurs as large crystals up to 15 cm in diameter. Individual channel samples have yielded assays of up to 2.51% Li2O over 1.1 m, indicating that petalite comprises approximately 50% of the mineral content in the rock sampled. The main Snowbank Pegmatite zone is up to 9 m wide, but pinches and swells with some sections bifurcating into two to three smaller parallel dykes from 1 to 3 m in width, for a combined average width of 6 m, over the 100 m exposure. Individual dykes exhibit classic pegmatite zoning features, with an internal assemblage of coarse petalite, potassium feldspar, albite and quartz, flanked by narrow albitic border and wall zones. Three channel samples collected from the petalite mineralized sections of the main Snowbank Pegmatite zone average 1.40% Li2O, while three other parallel dykes, also sampled, locally host similar mineralization over narrower widths. Highlights include lithium values of 1.53% Li2O over 2.6 m in channel 1A; 1.61% Li2O over 2.3 m in channel 2B; and 1.07% Li2O over 2.9 m in channel 4A - comprising six out of 11 analyzed samples (Avalon Advanced Materials Sept 4, 2018 and Nov 30, 2021 news releases).
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For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office