Ontario Geological Survey
Permanent Link to this Record:
MDI52L08SW00023
| Record Name(s) | Pegmatite #5 - 1994 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2004-Jun-07 |
| Date Last Modified | 2023-May-19 |
| Created By | |
| Revised By |
Primary Commodities: Lithium, Tantalum, Tin, Uranium
Township or Area: Treelined Lake Area
Latitude: 50° 15' 24.86" Longitude: -94° 29' 5.73"
UTM Zone: 15 Easting: 394150 Northing: 5568249.99 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52L08SW
Point Location Description: N/A
Location Method: Data Compilation
Access Description: NW of Separation Lake
1996: Tantalum Mining Corporation of Canada Ltd. drilled 7 DDH totalling 570.5 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52L08SW0004 | 20000004902 | 20000004902 |
| 2.40810 | 20000004000 | 20000004000 |
| OM92-064 | 52L08SW0005 | 52L08SW0005 |
| 2.52984 | 20000007423 | 20000007423 |
| 2.17086 | 52L08SW0023 | 52L08SW0023 |
Province: Superior
Subprovince: English River
Belt: Separation Lake
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Adjacent |
|---|---|---|---|---|
| Pegmatite | 1 | Complex-Type, Petalite-Subtype | Recrystallized Petalite Megacrysts | Host |
Jul 14, 2010 (C Ravnaas) - The pegmatite is hosted by mafic metavolcanics (amphibolite). Eastern Petalite Zone, apatite-plagioclase intergrowth, muscovite-quartz-plagioclase zone, petalite-K-feldspar-plagioclase zone.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 7 | Albite | Economic And Alteration | Gangue | Albitization | 1 | Medium | Replacement |
| 1 | Petalite | Economic | Ore | ||||
| 2 | Wodginite | Economic | Ore | ||||
| 3 | Ferrotapiolite | Economic | Ore | ||||
| 4 | Cassiterite | Economic | Ore | ||||
| 5 | Ferrotantalite | Economic | Ore | ||||
| 6 | Microlite | Economic | Ore | ||||
| 7 | Beryl | Economic | Ore | ||||
| 8 | Tourmaline | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Plagioclase | Economic | Gangue | ||||
| 3 | Muscovite | Economic | Gangue | ||||
| 4 | Feldspar | Economic | Gangue | ||||
| 5 | Biotite | Economic | Gangue | ||||
| 6 | Garnet | Economic | Gangue |
Jul 14, 2017 (C Ravnaas) - The ore minerals are petalite, wodginite, ferrotapiolite, cassiterite, ferrotantalite, microlite. The pegmatite contains abundant petalite, quartz, plagioclase, muscovite, K-feldspar, biotite; accessory beryl, apatite, garnet, tourmaline (schorl), oxides (W-wodginite, ferrowodginite, ferrotapiolite, cassiterite, ferrotantalite, microlite).
Jul 14, 2017 (Therese Pettigrew) - A value of 0.63 wt.% Li2O has been extimated for the extreme composition recorded from Pegmatite 5. The extreme composition of the tungsteniferous wodginite from Pegmatite 5 has the ideal formula of (LiMn3)(Fe3+3Sn)(W4Ta4)O32 and points toward an end--member composition of (Li2Mn2)(Fe3+4)(W6Ta2)O32. In Pegmatite 5, the effect of this substitution is to drop the Ta2O5 content from 66.0 wt % at the tungsten-poor end of the trend to 22.0 wt % at the tungsten--rich end. The U in microlite is high, reaching 13.2 to 16.6 wt % UO2 in uranmicrolite. Pegmatite 5 has a max 11.0 wt % Ta2O5 (Tindle and Breaks, 2000).
Jul 14, 2010 (C Ravnaas) - The alteration mineral is albite. The alteration type is albitization of petalite and K-feldspar. The habit is replacement, intensity is moderate.
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | PRECAMBRIAN |
Article - Granite-Related Mineralization in Northwestern Ontario: II. Detailed Examination of the Separation Rapids (English River) Rare-Element Pegmatite Group
Publication Number: MP163.024 Date: 1994
Author: Breaks F.W., Tindle A.G.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology, Separation Lake Greenstone Belt-West Sheet
Publication Number: P2673 Scale: 1:20,000 Date: 2008
Author: Blackburn C.E., Young J.B., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology, Separation Lake Greenstone Belt, West Part
Publication Number: OFM0241 Scale: 1:20,000 Date: 1994
Author: Blackburn C.E., Young J.B., Searcy T.O., Donahue K.
Publisher Name: Ontario Geological Survey
Location:
Mono - Tantalum Mineralogy of Rare-Element Granitic Pegmatites from the Separation Lake Area, Northwestern Ontario
Publication Number: OFR6022 Date: 2000
Author: Tindle A.G., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
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