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Ontario Geological Survey
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MDI42E03SW00016
| Record Name(s) | Sulphur Lake - 1921 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Apr-01 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Sulphur/Pyrite, Gold
Township or Area: Rope Lake Area
Latitude: 49° 0' 56.27" Longitude: -87° 17' 37.41"
UTM Zone: 16 Easting: 478523 Northing: 5429235 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42E03SW
Point Location Description: Iron formation on south shore of Sulphur Lake on OGS map M2023
Location Method: Conversion from MDI
1984: Corporation Falconbridge Copper carried out mapping and sampling. They reported a pit on the south shore of Sulphur Lake.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.7632 | 42E03SE8252 | 42E03SE8252 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Host |
|---|
Jun 14, 2019 (Therese Pettigrew) - Assessment work by Falconbridge in 1984 describes the Shy Lake – Cable Lake Iron formation as a pyrite-pyrrhotite iron formation, which extends across the northern part of the 1983 Big Duck Lake grid. It is exposed in pits and trenches south of Shy Lake on line 10W and north of Cable Lake. There is also a pit on the southern shore of Sulphur Lake. The sulphides are massive or finely banded. One of the pits on line 10E has massive sulphides with chert fragments in it (Assessment file 42E03SE8252).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore |
Jun 14, 2019 (Therese Pettigrew) - Hopkins (1922) reported that “running northeasterly across Sulphur Lake is a banded deposit, some 2 miles in length, of sugary quartz and pyrite. Veins of pyrite up to 2 feet in width and carrying low values of gold were noticed. Narrow pyrrhotite veins are also present.” Samples taken by Falconbridge in 1984 from the same formation between Cable and Shy Lakes returned results of 17-45 ppb Au and 1.2-2.0 ppm Ag (Assessment report 42E03SE8252).
Map - Big Duck Lake area, District of Thunder Bay
Publication Number: M2023 Scale: 1:15,840 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Mineral deposits of the Big Duck Lake area, District of Thunder Bay
Publication Number: R027 Scale: Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Schreiber-Duck Lake area
Publication Number: ARV30-04.001 Scale: Date: 1998
Author: Hopkins P.E.
Publisher Name: Ontario Dept. of Mines
Location:
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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office