Ontario Geological Survey
Permanent Link to this Record:
MDI52L08SW00024
| Record Name(s) | James Pegmatite - 1993, Pegmatite 4 - 1993 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2004-Jun-07 |
| Date Last Modified | 2022-Dec-09 |
| Created By | |
| Revised By |
Primary Commodities: Rubidium, Lithium, Tantalum, Beryl
Secondary Commodities: Uranium, Thorium, Phosphate, Tin, Cesium
Township or Area: Treelined Lake Area
Latitude: 50° 16' 27.51" Longitude: -94° 29' 18.8"
UTM Zone: 15 Easting: 393930 Northing: 5570190.01 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52L08SW
Point Location Description: NW of Separation Lake near English River Road
Location Method: Data Compilation
Access Description: NW of Separation Lake
1996: Tantalum Mining Corporation of Canada Ltd. drilled 7 DDH totalling 570.5 m. 2007: Quest Uranium Corp. carried out prospecting and sampling.
| 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 |
| 2.40813 | 20000003981 | 20000003981 |
Province: Superior
Subprovince: English River
Belt: Separation Lake
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Complex-Type, Petalite-Subtype | Coarse-Grained | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Adjacent |
Jul 14, 2010 (C Ravnaas) - The pegmatie is hosted by mafic metavolcanics (amphibolite) within the Eastern Petalite Zone, tourmaline-apatite-muscovite pegmatite, plagioclase-rich pod, quartz-rich pod.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Petalite | Economic | Ore | ||||
| 2 | Ferrotantalite | Economic | Ore | ||||
| 3 | Wodginite | Economic | Ore | ||||
| 4 | Cassiterite | Economic | Ore | ||||
| 5 | Spodumene | Economic | Ore | ||||
| 6 | Beryl | Economic | Ore | ||||
| 7 | Apatite | Economic | Ore | ||||
| 8 | Tourmaline | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Feldspar | Economic | Gangue | ||||
| 3 | Muscovite | Economic | Gangue | ||||
| 4 | Garnet | Economic | Gangue |
Jul 14, 2017 (C Ravnaas) - The ore minerals are petalite, ferrotantalite, ferrowodginite, cassiterite. The pegmatite contains abundant petalite, quartz, albite, K-feldspar, muscovite; accessory spodumene, beryl, apatite, tourmaline (schorl), garnet (spessartine), oxides (ferrotantalite, ferrowodginite, cassiterite, microlite).
Jul 29, 2019 (Therese Pettigrew) - Sampling at James Dike (located at NAD83 UTM Zone 15 393990 m E, 5570550 m N) returned assays of up to 10 ppm U3O8, 10 ppm Th, 714 ppm Be, 376 ppm Cs, 6100 ppm Rb, 211 ppm Ta, and 1.4% P (Assessment report 20000003981).
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| 1 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
| 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:
Journal - Columbite-Tantalite Mineral Chemistry from Rare-Element Granitic Pegmatites: Separation Lakes Area, NW Ontario, Canada; Mineralogy and Petrology, vol. 70, issue 3-4, pp. 165-198
Publication Number: Min&Pet V70 Date: 2000
Author: Breaks, F.W. and Tindle, A.G.
Publisher Name: Mineralogy and Petrology
Location: https://www.researchgate.net/publication/42797106_Columbite-tantalite_mineral_chemistry_from_rare-element_granitic_pegmatites_Separation_Lake_area_NW_Ontario_Canada
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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