Ontario Geological Survey
Permanent Link to this Record:
MDI31M05SE00090
| Record Name(s) | Preston Erie Cobalt Silver Mines - 1950, Brady Cross Lake Silver Mines Ltd. - 1946, Preston East Dome Mines Ltd. - 1950 |
|---|---|
| Related Record Type | Compound |
| Related Record(s) | |
| Record Status | Developed Prospect Without Reported Reserves or Resources |
| Date Created | 1980-Sep-01 |
| Date Last Modified | 2023-Aug-23 |
| Created By | |
| Revised By |
Primary Commodities: Cobalt
Secondary Commodities: Copper
Township or Area: Lorrain
Latitude: 47° 22' 12.25" Longitude: -79° 37' 46.34"
UTM Zone: 17 Easting: 603467.66 Northing: 5247200.46 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M05SE
Point Location Description: Brady Lake Silver Mines Shaft.
Location Method: Data Compilation
1904: Brady - pitting. 1906: Erie Cobalt Silver Mining Co. Ltd. - 3 shafts put down; Shaft 1 100 ft.; Shaft 2 75 ft.; Shaft 3 50 ft. deep; drifting on the 50 ft. level. 1946: W.P. Murdoch - geological survey. 1919: J. Brady - surface prospecting including development of several pits; property optioned; 1949: J. Brady - property optioned to Preston East Dome Mines Ltd. 1950: Preston East Dome Mines Ltd. - DD-18-10,476 ft. completed on the 3 claims. 1960: J. Price - DD-1-122 ft.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 19 | 31M05SE0105 | 31M05SE0105 |
| #16 | 31M05SE0015 | 31M05SE0015 |
| 18 | 31M05SE0010 | 31M05SE0010 |
Province: Southern
Subprovince: Cobalt Basin
Supergroup: Huronian Supergroup
Formation Group: Cobalt Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Quartz Diabase | 1 | Quartz Diabase | Intrudes |
|---|---|---|---|---|
| Conglomerate | 2 | Conglomerate | Hanging Wall | |
| Vein | 2 | Calcite | Host |
Aug 23, 2017 (A Wilson) - Nipissing diabase less than 500’ thick and dipping 25º ESE overlies 100-150 ft. of Cobalt Series greywacke. The Cobalt greywacke occupies the southwest end of a northeast trending paleovalley underlain by steeply dipping Keewatin rhyolite. The Cross Lake olivine diabase dike (of Keweenawan age) 50 ft. in width strikes southeast across the claim and dips 75ºNE.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Silver | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Gangue |
Aug 23, 2017 (A Wilson) - Two branches of the Cross Lake Fault cross the claim, one striking southeast and the other south-southwest. Irregular quartz calcite stringers occur locally on the claim.
| Rank | Characteristic |
|---|---|
| 1 | Vein |
Map - Cobalt silver area, southeastern sheet, Timiskaming District
Publication Number: M2052 Scale: 1:12,000 Date: 1997
Author: Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Preliminary report on the geology of the north part of Lorrain Township (concessions 7 to 12), District of Timiskaming
Publication Number: PR1960-01 Page: 44-50 Date: 1998
Author: Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 328-329, 333 Date: 1968
Author: Sergiades A.O.
Publisher Name: Ontario Dept. of Mines
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Kirkland Lake Resident Geologist District Office