Ontario Geological Survey
Permanent Link to this Record:
MDI31M05NE00112
| Record Name(s) | M.J. O'Brien Ltd. - 1915, The Cobalt Silver Syndicate Ltd. - 1936, Coballoy Mines and Refiners Ltd. - 1957, C.L. Murray - 1968 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1980-Sep-16 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Silver, Cobalt
Secondary Commodities: Lead, Copper
Township or Area: Gillies Limit
Latitude: 47° 22' 44.67" Longitude: -79° 41' 41.39"
UTM Zone: 17 Easting: 598521.64 Northing: 5248116.51 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M05NE
Point Location Description: Cobalt Silver Syndicate Shaft.
Location Method: Data Compilation
1915-1916: M.J. O’Brien: York-O’Brien shaft sunk; underground work from this shaft continued into 1916 with no ore found; 1936-37: Cobalt Silver Syndicate Ltd.: underground operations from an old shaft (Cobalt Silver Syndicate Shaft?).
Province: Southern
Subprovince: Cobalt Basin
Supergroup: Huronian Supergroup
Formation Group: Cobalt Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Near |
|---|---|---|---|---|
| Conglomerate | 2 | Cobalt Series | Hanging Wall |
Aug 08, 2017 (A Wilson) - Keewatin andesitic lava and interflow sediments occur in a synclinal fold whose axis trends and plunges west-northwest. On the north limb of the fold these rocks strike south-east and face south-west, on the south limb east-northeast and face north-northwest. In the southeast corner of the claim, Cobalt Series conglomerate faulted off by the north-northeast striking Cobalt Lake Fault; unconformably overlies the Keewatin volcanics. The York-O’Brien shaft vein strikes ENE for 200 ft. along an interflow sedimentary bed in the Keewatin rocks. Cobalt Silver Syndicate shaft vein strikes ENE 150 ft. along the same sedimentary bed in the Keewatin rocks. A third vein occurs striking northwest for 150 ft., 500 ft. southwest of the north post.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Silver | Economic | Ore | ||||
| 3 | Galena | Economic | Gangue |
Aug 08, 2017 (A Wilson) - Galena occurs largely as a replacement of a cherty Keewatin sedimentary band between lava flows. In addition, silver-cobalt mineralization is present in carbonate veins cutting Cobalt sedimentary rocks.
| Rank | Classification |
|---|---|
| 1 | Vein (Cobalt-Type) |
Map - Cobalt silver area, northern sheet, Timiskaming District
Publication Number: M2050 Scale: 1:12,000 Date: 1997
Author: Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Scale: Date: 1968
Author: Sergiades A.O.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Scale: Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Preliminary report on parts of Coleman Township and Gillies Limit to the south and southwest of Cobalt
Publication Number: PR1960-03 Scale: Date: 1998
Author: Thomson R.
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