Ontario Geological Survey
Permanent Link to this Record:
MDI52L07SE00045
| Record Name(s) | Great White North Pegmatite - 1997 |
|---|---|
| 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, Rubidium, Tantalum
Secondary Commodities: Cesium
Township or Area: Paterson Lake Area
Latitude: 50° 15' 48.73" Longitude: -94° 34' 7.83"
UTM Zone: 15 Easting: 388184 Northing: 5569110 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52L07SE
Point Location Description: West of Big Whopper
Location Method: Data Compilation
Access Description: The property is accessed by travelling north from Kenora along Highway 658 to the English River Road turnoff, approximately 2 km south of the town of Redditt on the CNR mainline railway, then north on the English River Road to a boat landing and campground at Separation Rapids. From the Separation Rapids campground, the property can be reached by boat, 8 km west along the English River. Alternatively, the property can be accessed by logging roads off the English River Road, namely the Sand Lake Road and the Snook Lake Road, which terminates immediately west of the property. A 2 km bush road cleared in September 1997 for drill access from the termination of the Snook Lake Road can be travelled in the winter months by four-wheel drive and in the spring and summer months by ATV.
1996: Avalon Ventures Ltd. acquired the property. 1997: Avalon conducted linecutting, a ground magnetometer survey, trenching, and drilled 3 DDH totalling 489 m. 2017: Avalon drilled 1 DDH totalling 243 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52L08SW0004 | 20000004902 | 20000004902 |
| 2.18285 | 52L07SE2001 | 52L07SE2001 |
| 2.19116 | 52L07SE2003 | 52L07SE2003 |
| 19416 | 20000015977 | 20000015977 |
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 |
|---|
Jul 13, 2010 (C Ravnaas) - Southwestern Petalite Zone, garnet-quartz-plagioclase wall zone, garnet-muscovite aplite, petalite zones.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Petalite | Economic | Ore | ||||
| 2 | Cassiterite | Economic | Ore | ||||
| 3 | Ferrocolumbite | Economic | Ore | ||||
| 4 | Manganocolumbite | Economic | Ore | ||||
| 5 | Manganotantalite | Economic | Ore | ||||
| 6 | Wodginite | Economic | Ore | ||||
| 7 | Ferrotantalite | Economic | Ore | ||||
| 1 | Feldspar | Economic | Gangue | ||||
| 2 | Quartz | Economic | Gangue | ||||
| 3 | Albite | Economic | Gangue | ||||
| 4 | Muscovite | Economic | Gangue | ||||
| 5 | Garnet | Economic | Gangue | ||||
| Holmquistite | Alteration | Lithium Metasomatism | 1 | Medium | Replacement | ||
| Biotite | Alteration | Biotitic | 2 | Medium | Replacement |
Jul 13, 2017 (C Ravnaas) - Ore minerals are petalite, cassiterite, ferrocolumbite, manganocolumbite, manganotantalite, wodginite, ferrotantalite. Pegmatite contains adundant K-feldspar, quartz, petalite, albite, muscovite and accessory garnet, oxides (gahnite, cassiterite, ferrocolumbite, manganocolumbite, wodginite, ferrotantalite, nigerite). Bulk analysis of petalite has 4.74 wt% Li2O.
Jul 29, 2019 (Therese Pettigrew) - The Great White North outcrop was originally thought to be the western termination of the Big Whopper, has been shown to be a disjointed dilational segregation of aplitic albite with a petalite rich core. It is probably rod-like and vertical, and could be an original extension of the Big Whopper, disjointed as a result of Type 2 interference folding or compressional dislocation as a result of pure shear stresses. Assays from DDH SR97-13 returned averaged values of up to 1.494 % Li2O, 0.007% Ta2O5, 0.051% Cs2O, and 0.530% Rb2O. Assays from DDH SR97-14 returned averaged values of up to 1.526% Li2O, 0.010% Ta2O5, 0.076% Cs2O, and 0.536% Rb2O. Assays from SR97-15 returned averaged values of up to 1.299% Li2O, 0.017% Ta2O5, 0.149% Cs2O, and 0.452% Rb2O (AFRI 52L07SE2003). A weighted average of the 7 channel samples taken from Trench 3 returned 1.784% Li2O, 0.375% Rb2O, 0.005% Cs2O, 72 ppm SnO2, 63 ppm Ta2O5, 0.005% Nb2O5, and 0.045% P2O5 over 14.3 m (Assessment report 52L07SE2003).
Dec 07, 2005 (C Ravnaas) - The alteration minerals are holmquistite, biotite. The alteration type is lithium metasomatism and biotitization of host rocks. Habit is replacement.
| Commodity | Analytical Method | Digestion Method | Result | Unit | Limit | Qualifier |
|---|---|---|---|---|---|---|
| Lithium | Unknown | 4.74 | % | LI2O |
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| 1 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 55 | 27 | PRECAMBRIAN |
Article - Rare-metal exploration potential of the Separation Lake Area: an emerging target for bikita-type mineralization in the Superior Province of northeastern Ontario
Publication Number: MP168.017 Page: 72-88 Date: 1997
Author: Breaks F.W., Tindle A.G.
Publisher Name: Ontario Geological Survey
Location:
Book - Rare-Element Mineralization of the Separation Lake Area, Northwest Ontario: Characteristics of a New Discovery of Complex-type, Petalite-subtype, Li-Rb0Cs-Ta Pegmatite; In: CIM Special Volume 53, Industrial Minerals in Canada, p. 159-178
Publication Number: CIM V53 Date: 2001
Author: Breaks, F.W. and Tindle, A.G.
Publisher Name: Canadian Institute of Mining, Metallurgy and Petroleum
Location:
Map - Geological series, Operation Kenora-Sydney Lake, Umfreville-Separation lakes sheet, District of Kenora
Publication Number: P1028 Scale: 1:63,360 Date: 1975
Author: Breaks F.W., Bond W.D., McWilliams G.H., Gower C.F., Findlay D.C., Stone D.
Publisher Name: Ontario Division of Mines
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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