Ministry of Energy, Northern Development and Mines
Permanent Link to this Record: MDI000000002325| Deposit Name(s) | Nickleby Lake Nw - 2001 |
|---|---|
| Deposit Status | occurrence |
| Date Created | 2019-Aug-27 |
| Date Last Modified | 2019-Aug-27 |
| Created By | T Pettigrew |
| Revised By | T Pettigrew |
Primary Commodities: lithium, rubidium, tantalum
Township or Area: Pickerel Lake Area
Latitude: 48° 43' 52.3" Longitude: -91° 24' 43.06"
UTM Zone: 15 Easting: 616775 Northing: 5398791 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52B11NW
Point Location Description: From Sample 01-FWB-126 in OFR6099
Location Method: data compilation
Access Description: Southeast of Highway 11.
2001: Sampled by OGS staff. No assessment reports were found on file.
Province: Superior
Subprovince: Quetico
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship |
|---|---|---|---|---|
| pegmatite | 1 | host | ||
| felsic intrusive | 2 | granite | contains |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Habit Description |
|---|---|---|---|---|---|---|---|
| 1 | schorl | economic | ore | ||||
| 1 | garnet | economic | gangue | ||||
| 2 | muscovite | economic | gangue | ||||
| 3 | biotite | economic | gangue |
08/27/2019 (T Pettigrew) - Tourmaline (magnesium-bearing schorl) was only found in garnet-biotite-muscovite potassic pegmatite at locality 01-FWB-126. The pegmatite dykes (10 cm to 1 m thick) contain quartz-rich patches with blocky potassium feldspar up to 30 cm in diameter. Silvery muscovite books are up to 2 cm thick and slender biotite blades are up to 20 cm long and 1 to 2 mm thick. Bulk coarse-grained muscovite (up to 5 cm across) in the quartz-rich patch contains 1179 ppm Li, 2065 ppm Rb and 170 ppm Ta. The elevated Ta content is significant because muscovite samples with >65 ppm Ta have a high probability to contain Ta-Nb mineralization. Pegmatite dykes intrude grey fine- to medium-grained muscovite-biotite granite (Breaks et al., 2003).
Publication - 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: OGS
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