Ontario Geological Survey
Permanent Link to this Record:
MDI31M05NE00003
| Record Name(s) | W.G. Trethewey - 1904, Coniagas Mines Ltd. - 1906, E.H. Clemns (leased) - 1928, Cobalt Properties Ltd. - 1932, A. Murphy and A. P. Landry - 1937, Sanymac Mining and Development Co. Ltd. - 1943, The Marcobalt Mining Syndicate Ltd. - 1956, Myer's Shaft - 1984 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 1984-Nov-02 |
| Date Last Modified | 2023-Aug-24 |
| Created By | |
| Revised By |
Primary Commodities: Cobalt, Silver
Secondary Commodities: Copper, Nickel
Township or Area: Coleman
Latitude: 47° 23' 57.02" Longitude: -79° 41' 6.85"
UTM Zone: 17 Easting: 599208 Northing: 5250362 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M05NE
Point Location Description: Shaft
Location Method: AMIS Site Visit
1905-08: Foster Claim carried out prospecting and mining. 1909: property leased to, Argentum Mines Limited. 1915-1916 : Glen Lake Cobalt Mines – property in operation. 1920: Central Operating Company Limited – in production.1925-1945: Cobalt Products Limited and Silanco Mining and Smelting Corporation Limited : in operation.. Late-1970s: Agnico-Eagle - Nipissing Claim 401 – underground mining and small open pit.
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 |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Footwall | ||
| Vein | 3 | Host |
Jul 27, 2017 (A Wilson) - Low dipping Cobalt sediments up to 300 ft. thick unconformably overlie steeply dipping Keewatin rocks that are cut by a Haileburian dioritic intrusive. The Coniagas and West faults with low easterly dips strike NNE across the property. Almost the entire production of silver and cobalt has come from the Cobalt sediments within 200’ of the surface in an area of about 17 acres on the northeast part of the property. The veins form a complex network, included among the major producers are Veins Nos. 2, 18 and 28; of these, Vein No. 2 is the most important. The Keewatin rocks, where exposed at surface on this Claim, strike a little south of east and dip steeply to the South. They consist largely of well-bedded sediments but lavas are also present. The sediments are in two bands each about 250 feet wide. Very little information on the position of these bands is available on that part of the claim covered by Cobalt Series sediments. A pre-Cobalt Series dioritic intrusive, with outcrop width of 600 feet, is exposed at surface in the west central part of the property. Its attitude is similar to that of the intruded Keewatin rocks and like them, it is believed to have undergone the post-Keewatin and pre-Lorrain granite.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Sphalerite | Economic | Gangue | ||||
| 2 | Galena | Economic | Gangue | ||||
| 4 | Silver | Economic | Gangue | ||||
| 5 | Chalcopyrite | Economic | Gangue |
Jul 28, 2017 (A Wilson) - Coniagas Mines, Limited report that from 1920 to Dec. 31, 1926 approximately 500,000 oz. were obtained from the Trethewey claim. This production was obtained almost entirely from veins traversing Cobalt Series sediments; to what extent the unproductivity of the Keewatin rocks was due to failure in persistence of the vein structures as opposed to diminution or change of metallic mineral content is not clear from published descriptions. Silver deposition occurred from the vicinity of the Cobalt series-Keewatin contacts upwards for some 150 feet to rock surface, and, originally, that is before erosion, to an unknown distance above this. Considered in a lateral sense, the productive veins were restricted to a small part of the area covered by Cobalt Series sediments. Most of the production was obtained from an area of 8 acres in the south and easterly part of the claim. Almost all of the productive part of the area of Cobalt series was underlain by bands of steeply-dipping Keewatin sediments and the position and attitude of these sediments appears to have been a most important factor determining the position and strike of the veins. The Main vein on the Trethewey is directly continuous with the Meyer vein on the adjoining Nipissing claim. The Main vein is part of a complex assemblage of veins some with easterly strikes but others with strikes in haphazard directions, Little information is available on the spacial relationships of silver to cobalt or nickel mineralization. Robinson (at one time mine manager) stated that nickel mineralization (largely as niccolite) occurred much more abundantly in the veins in the northern part of the property, and in the adjacent Hudson Bay claim, than in the southern part.
| Rank | Classification |
|---|---|
| 1 | Vein (Cobalt-Type) |
| Rank | Characteristic |
|---|---|
| 1 | Stratabound |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1943 | 301125 |
Silver 182819 Cobalt 71914 |
Silver Cobalt Calcite Vein Deposits of Ontario.118-119 | |
| 1905 | 447412 |
Silver 873551 Cobalt 69079 |
Silver Cobalt Calcite Vein Deposits of Ontario, p.118-119 | 33,963,067 oz. Ag ($20,093,356.00); 310,557 lbs. ($55,395.00); 3543 lbs. Ni ($228.00); 47,470 lbs.; $5436.00 Cu |
File - Resident Geologist file CO-0635
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:
Mono - Preliminary report on part of Coleman Township, concession 6, lots 1 to 6, District of Timiskaming
Publication Number: PR1961-03 Page: 139-154 Date: 1998
Author: Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 118-119 Date: 1968
Author: Sergiades A.O.
Publisher Name: Ontario Dept. of Mines
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:
Article - 1978 report of Kirkland Lake Resident Geologist
Publication Number: MP084.006 Page: 69 Date: 1997
Author: Lovell H.L., Ploeger F.R.
Publisher Name: Ontario Geological Survey
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 - 1975 report of the Kirkland Lake Resident Geologist
Publication Number: MP064.006 Page: 77 Date: 1997
Author: Lovell H.L., Ploeger F.R., Grabowski G.P.B.
Publisher Name: Ontario Division of Mines
Location:
Article - 1974 report of the Kirkland Lake Resident Geologist
Publication Number: MP060.006 Page: 124 Date: 1997
Author: Lovell H.L.
Publisher Name: Ontario Division of Mines
Location:
Article - 1981 report of the Kirkland Lake Resident Geologist
Publication Number: MP101.006 Page: 78, 81 Date: 1997
Author: Lovell H.L., Grabowski G.P.B.
Publisher Name: Ontario Geological Survey
Location:
Part - Geology of the mine workings of Cobalt and South Lorrain silver areas
Publication Number: ARV31-02.001 Page: 82-86 Date: 1998
Author: Knight C.W.
Publisher Name: Ontario Dept. of Mines
Location:
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