Ontario Geological Survey
Permanent Link to this Record:
MDI000000003490
| Record Name(s) | Alder Pegmatite - 2022 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2023-Jul-18 |
| Date Last Modified | 2023-Jul-18 |
| Created By | |
| Revised By |
Primary Commodities: Lithium
Secondary Commodities: Cesium
Township or Area: Pickerel Lake Area
Latitude: 48° 42' 14.57" Longitude: -91° 24' 9.14"
UTM Zone: 15 Easting: 617531 Northing: 5395788 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52B11NW
Point Location Description: OFR6401 p. 73
Location Method: Data Compilation
2022: Grid Metals Corp. carried out prospecting and sampling. 2023: Usha Resources Ltd. optioned the property.
Province: Superior
Subprovince: Quetico
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Is |
|---|---|---|---|---|
| Mafic Gneiss | 2 | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Muscovite | Economic | Ore | ||||
| 1 | Feldspar | Economic | Gangue |
Jul 18, 2023 (Therese Pettigrew) - The Alder Pegmatite (617531E 5395788N), located approximately 1.5 km east of the Maple Leaf Dike, is hosted within a gneissic-like mafic intrusion. The pegmatite is reported to be about 50 to 60 m wide, striking east-northeast at 70° and dipping 75° south. The pegmatite exhibits feldspars up to 70 cm in size. Sample B418731, collected from the mafic host rock at the contact on the north side of the pegmatite, returned 1300 ppm Li and 116 ppm Cs. Sampling of coarse-grained green muscovite from the Alder Pegmatite area returned 1880 ppm Li and 156 ppm Cs from sample B418727 and 1290 ppm Li and 63.1 ppm Cs from B418904 (Campbell et al., 2023).
| Commodity | Analytical Method | Digestion Method | Result | Unit | Limit | Qualifier |
|---|---|---|---|---|---|---|
| Beryllium | ICP-MS | Peroxide fusion | 11 | ppm | ||
| Cesium | ICP-MS | Peroxide fusion | 116 | ppm | ||
| Lithium | ICP-MS | Peroxide fusion | 1300 | ppm | ||
| Niobium | ICP-MS | Peroxide fusion | 4.8 | ppm | ||
| Rubidium | ICP-MS | Peroxide fusion | 591 | ppm | ||
| Tantalum | ICP-MS | Peroxide fusion | .5 | ppm |
Mono - Report of Activities 2022, Resident Geologist Program, Thunder Bay South Regional Resident Geologist Report: Thunder Bay South District
Publication Number: OFR6401 Page: 73 Date: 2023
Author: Campbell D.A., Jonsson J.R.B., Dorland G., Pettigrew T.K., Ferguson S.A.
Publisher Name:
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