Ontario Geological Survey
Permanent Link to this Record:
MDI52L08SW00027
| Record Name(s) | Audrey's Pegmatite - 1993 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 2004-Jun-07 |
| Date Last Modified | 2022-Feb-22 |
| Created By | |
| Revised By |
Primary Commodities: Niobium, Tantalum, Tin
Secondary Commodities: Beryl
Township or Area: Treelined Lake Area
Latitude: 50° 16' 13.82" Longitude: -94° 29' 50.7"
UTM Zone: 15 Easting: 393290 Northing: 5569780 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
1997: Tantalum Mining Corporation of Canada Ltd. drilled 10 DDH totalling 854.35 m. 1997: Champion Bear Resources Ltd. drilled 4 DDH totalling 375 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52L08SW0004 | 20000004902 | 20000004902 |
| 2.19136 | 52L08SW2003 | 52L08SW2003 |
| 2.19492 | 52L08SW2004 | 52L08SW2004 |
| 2.18226 | 52L08SW2002 | 52L08SW2002 |
| 2.18329 | 52L08SW2001 | 52L08SW2001 |
| 52L08SW0013 | 20000005302 | 20000005302 |
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 | Beryl Type | Coarse-Grained | Host |
Jul 14, 2010 (C Ravnaas) - The pegmatite is hosted by mafic metavolcanics (amphibolite). It is part of the Eastern Beryl Zone, garnet-muscovite-biotite granite with local areas of potassic pegmatite.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Wodginite | Economic | Ore | ||||
| 2 | Ferrocolumbite | Economic | Ore | ||||
| 3 | Cassiterite | Economic | Ore | ||||
| 4 | Beryl | Economic | Ore | ||||
| 5 | Apatite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Feldspar | Economic | Gangue | ||||
| 3 | Albite | Economic | Gangue | ||||
| 4 | Biotite | Economic | Gangue | ||||
| 5 | Muscovite | Economic | Gangue | ||||
| 6 | Garnet | Economic | Gangue |
Jul 14, 2017 (C Ravnaas) - The ore minerals are ferrowodginite, ferrocolumbite, cassiterite, beryl. The pegmatite contains abundant quartz, K-feldspar, albite, biotite, muscovite; accessory garnet, beryl, fluorapatite, oxides (ferrocolumbite, ferrowodginite, cassiterite).
Jul 14, 2017 (Therese Pettigrew) - This 0.7 to 1.2 m thick, steeply dipping dyke is exposed for 50 m and consists mostly of coarse-grained garnet-muscovite-biotite granite with local areas of potassic pegmatite. It contains local white to sea-green, commonly translucent, euhedral beryl crystals typically between 5 to 8 mm diameter and deep brown, euhedral cassiterite up to 3 by 9 mm (Breaks, 1993).
| 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: I. Raleigh Lake and Separation Rapids (English River) Rare-Element Pegmatite Fields
Publication Number: MP162.022 Scale: Date: 1993
Author: Breaks F.W.
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 Scale: 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:
Article - Granite-Related Mineralization in Northwestern Ontario: II. Detailed Examination of the Separation Rapids (English River) Rare-Element Pegmatite Group
Publication Number: MP163.024 Scale: Date: 1994
Author: Breaks F.W., Tindle A.G.
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 Scale: Date: 2000
Author: Tindle A.G., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
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