Ontario Geological Survey
Permanent Link to this Record:
MDI52A06NE00005
| Record Name(s) | Thunder Bay Silver - 1866 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect Without Reported Reserves or Resources |
| Date Created | 1979-Aug-13 |
| Date Last Modified | 2022-Apr-26 |
| Created By | |
| Revised By |
Primary Commodities: Silver
Secondary Commodities: Copper, Zinc, Barite, Lead
Township or Area: Macgregor
Latitude: 48° 29' 8.62" Longitude: -89° 9' 47.96"
UTM Zone: 16 Easting: 340151.06 Northing: 5372549.41 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A06NE
Point Location Description: General
Location Method: Conversion from MDI
1866: Discovered by P. McKellar. 1866-69: Work was carried out, including underground development and mining. 1874: Mine was in operation for 6 months. Workings consist of 4 shafts sunk on a composite vein, a crosscut driven NW on the 60 foot level, and some drifting between shafts No. 1 and 2. No. 1 and No. 2 shafts were sunk 70 feet, No. 3 shaft 35 feet, and No. 4 shaft 25 feet. No assessment files were found on record.
Province: Southern
Formation Group: Animikie Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Terrigenous-Clastic-Unsubdivided | 1 | Adjacent |
|---|---|---|---|---|
| Vein | 2 | Host | ||
| Diabase | 3 | Diabase Sill | Near |
Jun 20, 2018 (Therese Pettigrew) - The host rock of the veins consists of Animikie cherty carbonate of the Gunflint formation and black shales that strike N34 E and dip 22 degrees SE in the vicinity of the vein but subhorizontally 30.5 m NW beneath a diabase sill 12.2 m thick. A 3 m wide composite vein or stockwork of up to 2.5 cm wide veinlets lies within and parallel to a fault that also strikes N34E and dips 65 degrees NW.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Silver | Economic | Ore | ||||
| 2 | Argentite | Economic | Ore | ||||
| 3 | Galena | Economic | Ore | ||||
| 4 | Sphalerite | Economic | Ore | ||||
| 5 | Pyrite | Economic | Ore | ||||
| 6 | Barite | Economic | Ore | ||||
| 7 | Chalcopyrite | Economic | Ore | ||||
| 8 | Fluorite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Calcite | Economic | Gangue |
Jun 20, 2018 (Therese Pettigrew) - Ore was mined locally over the total length of 182.9 m. Native silver and argentite occurred in pockets 7.6-45.7 cm thick by 1.8-12.2 m in length, the silver being in leaves and grains irregularly distributed in a gangue of quartz, with some calcite, galena, sphalerite, and pyrite. A second vein of calcite occurs in a parallel fault 6.1 m SE of the composite vein (Sergiades, 1968).
| Rank | Classification |
|---|---|
| 1 | Vein |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1911 | 181 |
Silver 16000 Ounces |
Sergiades, 1968, p. 67, and Thunder Bay RGP mineral deposit files | Approx. 200 tons of low-grade ore from the first works of the mine were hauled to the company’s mill. At the second closing of the mine, the manager had the ore hauled to his own mill. The actual yield was not made known. The Ontario Bureau of Mines, v. 19, part 2, p. 208, estimated that the value of silver ore produced was $20,000 from about 16,000 oz of silver. |
Map - Geological series, Precambrian geology, MacGregor Township, east half, District of Thunder Bay
Publication Number: P2985 Scale: 1:15,840 Date: 1986
Author: Scott J.F., Sequin J.M.
Publisher Name: Ontario Geological Survey
Location:
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 67 Date: 1968
Author: Sergiades A.O.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Fort William and Port Arthur, and Thunder Cape Map-area, Thunder Bay District, Ontario; Geological Survey of Canada, Memoir 167
Publication Number: GSC Memoir 167 Page: 155-156 Date: 1931
Author: Tanton, T.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100799
Article - MacGregor Township, District of Thunder Bay
Publication Number: MP119.008 Page: 46-48 Date: 1997
Author: Scott J.F.
Publisher Name: Ontario Geological Survey
Location:
Part - The cobalt-nickel arsenides and silver deposits of Temiskaming (Cobalt and adjacent areas), chapters 1, 2 and 3
Publication Number: ARV19-02.001 Page: 208 Date: 1998
Author: Miller W.G., Burrows A.G., Hore R.E., DeLury J.S., Knight C.W., Stewart R.B., Collins W.H.
Publisher Name: Ontario Bureau of Mines
Location:
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