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Ontario Geological Survey
Permanent Link to this Record:
MDI000000002385
| Record Name(s) | Barnum Lake Road Pegmatite - 2001 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2020-Mar-23 |
| Date Last Modified | 2023-Apr-18 |
| Created By | |
| Revised By |
Primary Commodities: Granite, Rubidium
Secondary Commodities: Lithium, Tantalum, Cesium, Niobium
Township or Area: Onion Lake Area
Latitude: 48° 41' 35.98" Longitude: -89° 10' 21.17"
UTM Zone: 16 Easting: 340126 Northing: 5395642.99 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A11NE
Point Location Description: Sample 01-FWB-113 from OFR6099
Location Method: Data Compilation
2012-13: M. Joseph carried out prospecting, stripping, trenching, and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.54562 | 20000009099 | 20000009099 |
Province: Superior
Subprovince: Quetico
Geological Age: Archean
Mar 23, 2020 (Therese Pettigrew) - The area is immediately adjacent and south of the Current River along the Current Lake Fault in the Quetico Subprovince. Rare-element mineralization was discovered by the OGS survey within the extensive swarm of pegmatitic granite dikes near the junction of Highway 527 and Barnum Lake road and northward to the Current River (Breaks et al., 2003).
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Potassic | Is |
|---|---|---|---|---|
| Gneiss-Unsubdivided | 2 | Adjacent |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Muscovite | Economic | Gangue |
Mar 23, 2020 (Therese Pettigrew) - Locality 01-FWB-113 has coarse-grained silver to brown muscovite (up to 3.5 cm) in potassic pegmatite. The bulk composition of this muscovite has elevated Li (861 ppm), Rb (2871 ppm) and Cs (90 ppm), Nb (480 ppm) and Ta (67 ppm). The lens-shaped dikes of this swarm occur as northeast-striking, "whale-back" glacial erosional remnants that achieve a maximum size of 100 by 300 metres (Breaks et al., 2003).
Mono - Fertile Peraluminous Granites and Related Rare-Element Mineralization in Pegmatites, Superior Province, Northwest and Northeast Ontario: Operation Treasure Hunt
Publication Number: OFR6099 Date: 2003
Author: Breaks F.W., Selway J.B., Tindle A.G.
Publisher Name: Ontario Geological Survey
Location:
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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office