Ontario Geological Survey
Permanent Link to this Record:
MDI31M05NE00078
| Record Name(s) | Trethewey JB7 - 1904, Trethewey Silver Cobalt Mines Ltd. - 1906, Coniagas Mines Ltd. - 1920, Cobalt Properties Ltd. - 1932, C.A. Landry and R. Mercier - 1937, Sanymac Mining and Development Co. Ltd - 1943, The Marcobalt Mining Syndicate Ltd. - 1956 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 1980-Oct-20 |
| Date Last Modified | 2023-Aug-24 |
| Created By | |
| Revised By |
Primary Commodities: Cobalt, Silver
Secondary Commodities: Nickel
Township or Area: Coleman
Latitude: 47° 24' 1.34" Longitude: -79° 41' 9.39"
UTM Zone: 17 Easting: 599152.65 Northing: 5250494.51 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M05NE
Point Location Description: Main Vein Shaft
Location Method: Data Compilation
1904-1920: W. G. Trethewey, Trethewey Silver Cobalt Mines Ltd. and Coniagas Mines Ltd. – six shafts with underground workings; 1934: a number of surface diamond drill holes were put down.; the grade of the ore between 1904 to 1916 was 33 oz./t
Province: Southern
Subprovince: Cobalt Basin
Supergroup: Huronian Supergroup
Formation Group: Cobalt Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Sandstone | 1 | Greywacke | Contains |
|---|---|---|---|---|
| Diorite | 2 | Diorite | Intrudes | |
| Vein | 3 | Host |
Jul 27, 2017 (A Wilson) - Low dipping Cobalt sediments up to 186’ thick unconformably overlie steeply dipping Keewatin rocks that are cut by a Haileyburian dioritic intrusive. The property is traversed by two faults: - the Trethewey Fault striking north with low easterly dip is a reverse fault; the Trethewey Fault striking north with low easterly dip is a reverse fault; the No. 6 shaft fault striking ESE with steep south dip is a normal fault. A network of productive veins occur in the southeast corner of the property. The veins are the direct extensions of the veins in the contiguous properties of Nipissing and Coniagas. Production was largely restricted to the Cobalt Series.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 2 | Smaltite | Economic | Ore |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1943 | 7039 |
Silver 225701446 Cobalt 98154 |
MRC 10, P.212-213 | Total Production 1904-1943: 216,198 lbs. cobalt; 7,756,470 oz. silver, 192 lbs. nickel |
File - Resident Geologist file CO-0829
Publication Number: Date:
Author:
Publisher Name:
Location: Kirkland Lake RGP office
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:
Part - Geology of the mine workings of Cobalt and South Lorrain silver areas
Publication Number: ARV31-02.001 Page: 140-141 Date: 1998
Author: Knight C.W.
Publisher Name: Ontario Dept. of Mines
Location:
Article - 1977 report of Kirkland Lake Resident Geologist
Publication Number: MP078.006 Page: 67 Date: 1997
Author: Lovell H.L., Ploeger F.R.
Publisher Name: Ontario Geological Survey
Location:
Article - 1979 report of the Kirkland Lake Resident Geologist
Publication Number: MP091.006 Page: 78, 81 Date: 1997
Author: Lovell H.L., Ploeger F.R.
Publisher Name: Ontario Geological Survey
Location:
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 212-213 Date: 1968
Author: Sergiades A.O.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Preliminary report on part of Coleman Township, concession 6, lots 1 to 6, District of Timiskaming
Publication Number: PR1961-03 Page: 133-139 Date: 1998
Author: Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
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