Ontario Geological Survey
Permanent Link to this Record:
MDI42E05SW00022
| Record Name(s) | Island Showing - 1955, Georgia Lake - 1983 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 1983-Sep-12 |
| Date Last Modified | 2023-May-19 |
| Created By | |
| Revised By |
Primary Commodities: Lithium
Township or Area: Barbara Lake Area
Latitude: 49° 19' 16.7" Longitude: -87° 54' 31.49"
UTM Zone: 16 Easting: 433961.07 Northing: 5463571.92 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42E05SW
Point Location Description: Precise
Location Method: Conversion from MDI
Access Description: The property is approx. 50 km NE of Nipigon.
1955: staked by Ontario Lithium Company Ltd., who conducted trenching and sampling. 1957: Ontario Lithium Co. Ltd. drilled 3 DDH totalling 68.6 m. 2011: Canadian Copper Core Inc. flew aeromag and VLF-EM geophysical surveys.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.50968 | 20000007174 | 20000007174 |
| 10 | 42E05SW0013 | 42E05SW0013 |
Province: Superior
Subprovince: Quetico
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Host |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | Adjacent |
Jun 29, 2017 (Therese Pettigrew) - The reef in Georgia Lake is crudely circular with a diameter of about 75 feet. Except for a few small inclusions of metasediments, it consists entirely of coarse-textured pegmatite (Pye, 1965).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Spodumene | Economic | Ore | ||||
| 2 | Beryl | Economic | Ore | ||||
| 1 | Feldspar | Economic | Gangue | ||||
| 2 | Quartz | Economic | Gangue | ||||
| 3 | Muscovite | Economic | Gangue | ||||
| 4 | Apatite | Economic | Gangue | ||||
| 5 | Garnet | Economic | Gangue |
Jun 29, 2017 (Therese Pettigrew) - The pegmatite is made up of potash and plagioclase feldspars, quartz, spodumene, and subordinate muscovite with a little apatite and red garnet. Beryl also is reported to be present (Gilmour 1955). The spodumene crystals, mostly less than 12 inches in length, occasionally attain lengths of 14-18 inches. The Island deposit was trenched at intervals of 15-20 feet in the early summer of 1955. Sixty-six samples, each weighing 4.4 pounds, were taken across 3-foot widths. These indicated an average grade of 1.2 percent Li2O. A bulk sample weighing 470 pounds was also taken, which was found on analysis to yield 1.4 percent Li2O. Three diamond drillholes, spaced about 50 feet apart at the corners of a near-equilateral triangle, and aggregating 225.0 feet, were drilled vertically through the pegmatite. These showed the pegmatite to have vertical thicknesses of 17.8-49.5 feet, and its lower surface to strike north-south and dip about 35 degrees E (Pye, 1965).
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
Map - Georgia Lake area, Thunder Bay District
Publication Number: M2056 Scale: 1:63,360 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology and lithium deposits of Georgia Lake area, District of Thunder Bay
Publication Number: R031 Page: 98-99 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Geology of Canadian Lithium Deposits; Geological Survey of Canada, Economic Geology Report 21
Publication Number: Econ Geol 21 Page: 58-59 Date: 1965
Author: Mulligan, R.
Publisher Name: Geological Survey o
Location: https://doi.org/10.4095/102454
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