Ontario Geological Survey
Permanent Link to this Record:
MDI52L07SE00048
| Record Name(s) | Lou's Pegmatite - 1993 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 2004-Jun-07 |
| Date Last Modified | 2023-Feb-02 |
| Created By | |
| Revised By |
Primary Commodities: Lithium, Niobium, Tantalum, Tin
Secondary Commodities: Beryl (Gemstones)
Township or Area: Paterson Lake Area
Latitude: 50° 16' 17.39" Longitude: -94° 30' 15.07"
UTM Zone: 15 Easting: 392810 Northing: 5569900 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52L07SE
Point Location Description: North of Separation Lake and west of English River Road. Pegmatite is located NW of the Markos Peg
Location Method: Data Compilation
Access Description: NE of English River
1996: Tantalum Mining Corporation of Canada Ltd. (Tanco) carried out geological mapping, sampling, and drilled 7 DDH totalling 570.73 m. 1997: Tanco carried out mapping, sampling, and drilled 10 DDH totalling 854.35 m. 1998: Tanco conducted soil sampling and geological mapping.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52L08SW0004 | 20000004902 | 20000004902 |
| 2.40810 | 20000004000 | 20000004000 |
| 2.18226 | 52L08SW2002 | 52L08SW2002 |
| 2.20238 | 52L08SW2008 | 52L08SW2008 |
| 52L08SW0013 | 20000005302 | 20000005302 |
| 2.17086 | 52L08SW0023 | 52L08SW0023 |
| 2.19410 | 52L08SW2005 | 52L08SW2005 |
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 | Coarse-Grained | Host |
Jul 13, 2010 (C Ravnaas) - Pegmatite is hosted by hosted by mafic metavolcanics (amphibolite). Eastern Petalite Zone, muscovite-quartz-albite outer zone, K-feldspar-petalite core zone.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Petalite | Economic | Ore | ||||
| 2 | Ferrocolumbite | Economic | Ore | ||||
| 3 | Ferrotantalite | Economic | Ore | ||||
| 4 | Wodginite | Economic | Ore | ||||
| 5 | Cassiterite | Economic | Ore | ||||
| 6 | Beryl | Economic | Ore | ||||
| 7 | Tourmaline | Economic | Ore | ||||
| 8 | Zircon | Economic | Ore | ||||
| 9 | Apatite | Economic | Ore | ||||
| 10 | Holmquistite | Economic | Ore | ||||
| 1 | Feldspar | Economic | Gangue | ||||
| 2 | Quartz | Economic | Gangue | ||||
| 3 | Muscovite | Economic | Gangue | ||||
| 4 | Garnet | Economic | Gangue | ||||
| 5 | Biotite | Economic | Gangue |
Jul 14, 2017 (C Ravnaas) - The ore minerals are petalite, ferrocolumbite, ferrotantalite, wodinite, cassiterite, beryl. The pegmatite contains abundant petalite, K-feldspar, albite, quartz, muscovite, accessory beryl, tourmaline (schorl), garnet, zircon, apatite, monazite, oxides (ferrocolumbite, ferrotantalite, cassiterite, wodginite, stibiomicrolite). Alteration minerals are holmquisite, biotite and tourmaline in host rocks. Alteration type-lithium metasomatism,
Jul 14, 2017 (Therese Pettigrew) - Lou’s Pegmatite is 0.6-1.4 m thick and exposed for 50 m. This body is marked by conspicuous, partly translucent white, light blue or sea-green beryl up to 3 by 6.5 cm in a section roughly parallel to the c-axis. One small area of the pegmatite contains petalite megacrysts, up to 32 by 67 cm which have commonly coalesced and are rimmed by a fine-grained mass rich in milky albite and accessory fine-grained lime-green muscovite. Other minerals include red-brown garnet, yellow-brown muscovite books up to l cm thick, black tourmaline especially prominent in masses near the upper contact, columbite-tantalite and cassiterite. Contact metasomatism of the mafic metavolcanic host-rocks is marked by a 30 cm thick zone of conspicuous biotite, tourmaline and holmquistite, the latter occurring as randomly oriented dark purple needles up to 3 mm by 4 cm (Breaks, 1993).
Dec 07, 2005 (C Ravnaas) - The alteration minerals are holmquistite, biotite and tourmaline in host rocks. The alteration type is lithium metasomatism, biotitization, tourmalinization. Habit replacement.
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| 1 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 50 | 1.4 | PRECAMBRIAN |
Article - Granite-Related Mineralization in Northwestern Ontario: I. Raleigh Lake and Separation Rapids (English River) Rare-Element Pegmatite Fields
Publication Number: MP162.022 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 v. 70, issue 3-4, p. 165-198
Publication Number: Min&Pet V70 Date: 2001
Author: Tindle, A.G. and Breaks, F.W.
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 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 Date: 2000
Author: Tindle A.G., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
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