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Ontario Geological Survey
Permanent Link to this Record:
MDI52J14NE00006
| Record Name(s) | Lake St. Joseph - 1922 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 2001-Feb-21 |
| Date Last Modified | 2023-May-24 |
| Created By | |
| Revised By |
Primary Commodities: Beryllium
Township or Area: Trist Lake Area
Latitude: 50° 56' 21.11" Longitude: -91° 13' 45.41"
UTM Zone: 15 Easting: 624408.879 Northing: 5644556.375 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52J14NE
Point Location Description: Be symbol noted on map 2158
Location Method: Other Literature
Access Description: Access is by boat to the southwest bay of Lake St. Joseph. The beryl occurrence is located on the north shore of the eastern peninsula in the bay just northeast of the intersection of Dobie 2nd Meridian and Dobie 1st Baseline.
No exploration work has been recorded for this occurrence.
Province: Superior
Subprovince: English River
Geological Age: Neoarchean
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Host |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Beryl | Economic | Ore | ||||
| 1 | Tourmaline | Economic | Gangue |
Aug 27, 2007 (Mark Puumala) - Bruce (1922) reports the presence of beryl in a pegmatite intrusion found at this location. Clifford (1969) indicates that this is one of many pegmatites that occur toward the western end of Lake St. Joseph. Clifford (1969) describes the pegmatites as small, irregular-shaped (i.e., folded) bodies that contain abundant coarse-grained potassium feldspar (up to 30 cm) and muscovite, with lesser amounts of plagioclase and tourmaline. These intrusions are hosted within metasedimentary rocks of the English River Domain immediately south of the Lake St. Joseph Fault Zone.
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
Map - Blackstone Lake sheet, Kenora District
Publication Number: M2158 Scale: 1:31,680 Date: 1968
Author: Clifford P.M.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of the western Lake St. Joseph area, Kenora and Thunder Bay districts
Publication Number: R070 Date: 1969
Author: Clifford P.M.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Western part of Lake St. Joseph, districts of Kenora, Thunder Bay and Patricia, Ontario
Publication Number: ARM31E Scale: 1:63,360 Date: 1997
Author: Bruce E.L.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Iron formation of Lake St. Joseph
Publication Number: ARV31-08.001 Date: 1998
Author: Bruce E.L.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Sioux Lookout-Armstrong, geological compilation series, Kenora and Thunder Bay districts
Publication Number: M2442 Scale: 1:253,440 Date: 1981
Author: Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Mono - Pegmatite mineral resources of Ontario
Publication Number: IMR021 Page: 38 Date: 1997
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office