Ontario Geological Survey
Permanent Link to this Record:
MDI52A07SE00003
| Record Name(s) | Edward Island - 1884 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1980-Jan-24 |
| Date Last Modified | 2022-Apr-26 |
| Created By | |
| Revised By |
Primary Commodities: Silver
Secondary Commodities: Copper, Zinc, Lead
Township or Area: Porphyry Island Area
Latitude: 48° 21' 22.05" Longitude: -88° 38' 38.41"
UTM Zone: 16 Easting: 378213 Northing: 5357189 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A07SE
Point Location Description: AMIS Shaft location
Location Method: Conversion from MDI
1884: Silver Islet Co. sank two shafts on the southwestern end of Edward Island. The No. 1 shaft was located on the beach and was sunk 10.7 m. The No. 2 shaft was located inland about 61 m to the NE and was sunk 30.5 m. 1921: D.C. Peacock dewatered the No. 1 shaft and extended it a few metres. 1963: Monarch Gold Mines optioned the property and carried out an EM survey and drilled 2 DDH totalling 396.2 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 10 | 52A07SE0001 | 52A07SE0001 |
Province: Southern
Formation Group: Animikie Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | |||
| Vein | 3 | Calcite | Host |
Mar 28, 2018 (Therese Pettigrew) - Mafic metavolcanics, locally 9.1 m thick, overlie calcareous quartz sandstone and red fragmental rock of the Osler Series. These rocks have been faulted and intruded by a system of NE Keweenawan diabase dykes. A major NE fault zone cuts all of these rocks; two minor nearly parallel faults within this zone are mineralized and each has been explored by a shaft. In the shaft No. 1 vein, native silver and argentite occur in a gangue of calcite; other minerals include: sphalerite, native arsenic chalcopyrite and galena. Vein No.2 is sparsely mineralized with galena, sphalerite and chalcopyrite (Sergiades, 1968).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Argentite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Galena | Economic | Ore | ||||
| 4 | Sphalerite | Economic | Ore | ||||
| 1 | Calcite | Economic | Gangue |
Mar 28, 2018 (Therese Pettigrew) - Ore taken from the No. 1 shaft assayed 80 opt Ag. The Shaft No. 1 vein strikes N and varies in width up to 0.3 m with branches and parallel veinlets extending to a width of 0.6 m on either side. The No. 2 Shaft vein strikes N and is of the composite type with a width of several metres (Sergiades, 1968).
| Rank | Classification |
|---|---|
| 1 | Vein |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 73 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: 186-187 Date: 1931
Author: Tanton, T.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100799
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