Ontario Geological Survey
Permanent Link to this Record:
MDI52L07SE00035
| Record Name(s) | Pegmatite 93-251 - 1993 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 2004-Jun-07 |
| Date Last Modified | 2023-May-25 |
| Created By | |
| Revised By |
Primary Commodities: Niobium, Beryllium
Township or Area: Paterson Lake Area
Latitude: 50° 15' 48.07" Longitude: -94° 32' 51.99"
UTM Zone: 15 Easting: 389685 Northing: 5569058.01 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52L07SE
Point Location Description: South shore of Separation Lake west of bridge
Location Method: Data Compilation
Access Description: on an island in English River
1996-97: Tantalum Mining Corp. of Canada Ltd. carried out mapping and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52L08SW0004 | 20000004902 | 20000004902 |
| 2.20238 | 52L08SW2008 | 52L08SW2008 |
| 2.19410 | 52L08SW2005 | 52L08SW2005 |
Province: Superior
Subprovince: English River
Belt: Separation Lake
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Beryl-Type | Host |
|---|---|---|---|---|
| Granite | 2 | Biotite-Muscovite-Garnet Leucogranite | Adjacent |
Jul 13, 2010 (C Ravnaas) - Separation Rapids Pluton, garnet-muscovite pegmatitic leucogranite.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Beryl | Economic | Ore | ||||
| 2 | Ferrocolumbite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Plagioclase | Economic | Gangue | ||||
| 3 | Muscovite | Economic | Gangue | ||||
| 4 | Biotite | Economic | Gangue | ||||
| 5 | Garnet | Economic | Gangue |
Jul 13, 2017 (C Ravnaas) - The ore minerals area beryl, ferrocolumbite. The pegmatite contains abundant quartz, plagioclase, muscovite, biotite; accessory beryl, garnet, ferrocolumbite.
Jul 13, 2017 (Therese Pettigrew) - Pegmatite 93-251 is a garnet-muscovite granodiorite with perhaps a trace of biotite. Rock contains scarce, minute, rod-like and square-shaped black minerals (ferrocolumbite), the latter with red, secondary alteration halos. Local lime-green beryl occurs in same outcrop, but is not found in electron microprobe sample. The electron microprobe returned an analysis of 63.58 Nb2O5 and 28.51 Ta2O5.
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| 1 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | PRECAMBRIAN |
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:
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:
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 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:
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For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office