Ontario Geological Survey
Permanent Link to this Record:
MDI52L08SW00015
| Record Name(s) | Treelined Lake Uranium - 1985 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1985-Jul-05 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Thorium
Secondary Commodities: Uranium
Township or Area: Treelined Lake Area
Latitude: 50° 17' 40.6" Longitude: -94° 27' 55.78"
UTM Zone: 15 Easting: 395617.63 Northing: 5572414.89 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52L08SW
Point Location Description: General
Location Method: Conversion from MDI
1968: Linklatter dug trenches and pits. 1976: Area was restaked by Harrison and Perkins. Sampling was carried out by T. Skiming.
Province: Superior
Subprovince: English River
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Quartz Monzonite | 1 | Medium-Grained | Host |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | Adjacent |
Aug 28, 2017 (Therese Pettigrew) - The area is underlain by mixed, highly metamorphosed sedimentary or volcanic migmatites and anatectic granitic rocks. The metasediments range from poorly to moderately well bedded and are generally very siliceous. They locally contain significant amounts of pyrite and pyrrhotite, both as fine disseminations and stringers and as more massive beds. Graphite is also conspicuous in places, both in narrow sheared sections and as disseminations in the more siliceous metasediments. Intermixed with these supracrustal rocks are irregular zones of biotite-rich diatexite. Although usually having a medium-grained granitic texture and consisting of orthoclase, biotite, and quartz, these rocks locally have a weakly foliated to vaguely layered appearance, often containing zones of partially assimilated biotitic sedimentary rock or simple wisps of biotite. Sulphide minerals and graphite are occasionally present in the granitic rocks as well as the layered rocks (Beard and Rivett, 1977). The highest radioactivity is associated with the biotite-rich granitic rocks (Robertson and Gould, 1983).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Graphite | Economic | Ore | ||||
| 1 | Biotite | Economic | Gangue |
Aug 28, 2017 (Therese Pettigrew) - The occurrence is in massive to gneissic medium-grained quartz monzonite. The radioactivity is concentrated in the biotite bands and zones. These zones contain up to 80% fine biotite and some graphite (Vos et al., 1987). Grab samples assayed 0.008 to 0.02% U3O8 and 0.28% ThO2 (Robertson and Gould, 1983). Radioactive zones have been exposed by trenching over an area over 210 m long. Anomalous radioactivity occurs in both the granitic rocks and the metasediments. Highest radioactivity, however, was noted in areas where abundant biotite is present. No radioactive minerals have been identified nor has any secondary yellow staining been noted. In the main trench area, on claim 449585, one radioactive zone approximately 60 m long and 15 m wide has been outlined by scintillometer readings. Readings over this zone were consistently more than six times background. Harrison also reported several old trenches on similar radioactive occurrences 4 km west of this showing (Beard and Rivett, 1977).
Article - 1976 report of the Northwestern Regional Geologist and Kenora Resident Geologist
Publication Number: MP071.001 Scale: Date: 1997
Author: Beard R.C., Rivett A.S.
Publisher Name: Ontario Geological Survey
Location:
Mono - Uranium and thorium deposits of northern Ontario
Publication Number: MDC025 Scale: Date: 1984
Author: Robertson J.A., Gould K.L.
Publisher Name: Ontario Geological Survey
Location:
Mono - Industrial minerals of northern Ontario
Publication Number: MDC026 Scale: Date: 1985
Author: Vos M.A., Abolins T., McKnight R.L.W., Smith V.
Publisher Name: Ontario Geological Survey
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:
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