Ontario Geological Survey
Permanent Link to this Record:
MDI52A10SW00005
| Record Name(s) | Algoma - 1872 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Mar-05 |
| Date Last Modified | 2022-Apr-27 |
| Created By | |
| Revised By |
Primary Commodities: Silver
Secondary Commodities: Copper, Zinc, Fluorite, Lead
Township or Area: Macgregor
Latitude: 48° 30' 51.52" Longitude: -88° 57' 50.35"
UTM Zone: 16 Easting: 354961 Northing: 5375329 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A10SW
Point Location Description: AMIS Shaft location
Location Method: Conversion from MDI
1872: a shaft was sunk.
Province: Southern
Formation Group: Animikie Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Diabase | 2 | Diabase Sill | Adjacent |
Apr 24, 2018 (Therese Pettigrew) - The vein lies at the base of a north-facing cliff 15.2 m high which is capped by a diabase sill. The sill is 7.6 m thick and lies on horizontal chert and iron carbonate, a phase of Animikie iron formation. It is reported that a shaft was sunk through 15.2 m of unconsolidated material and 6 m farther into the vein in the consolidated rock, and that to the east a second shaft was sunk on the vein and from it a crosscut was driven southern through shaly iron formation to a point where diabase was encountered, which was interpreted as a vertical dyke cutting across the sediments. No vein was found at the contact (Tanton, 1931).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Galena | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Calcite | Economic | Gangue |
Apr 24, 2018 (Therese Pettigrew) - The vein material consists of quartz and calcite irregularly mineralized with galena and pyrite. It cements a brecciated shatter zone striking ENE. No mineral deposit of commercial importance is known to have been in this vein. The width of the vein has not been recorded (Tanton, 1931).
| Rank | Classification |
|---|---|
| 1 | Vein |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
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:
Book - 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: 157 Date: 1931
Author: Tanton, T.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100799
Map - Geological series, Precambrian geology, MacGregor Township, west half, District of Thunder Bay
Publication Number: P2984 Scale: 1:15,840 Date: 1986
Author: Scott J.F., Sequin J.M.
Publisher Name: Ontario Geological Survey
Location:
Publication - Report on mines and mining on Lake Superior; Geological Survey of Canada, Annual Report vol. 3, (1887-1888), pt. H
Publication Number: GSC AR 3-H Page: 64 Date: 1888
Author: Ingall, E.D.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/297102
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