Ontario Geological Survey
Permanent Link to this Record:
MDI31M05NE00189
| Record Name(s) | Cobalt Monarch Mining Co. - 1906, Watash Cobalt Mines Ltd. - 1909, Domash Silver Mines Ltd. - 1928, Sycee Cobalt Silver Mines Ltd. - 1942, Big Agaunico Mine Ltd. - 1953, Mentor Exploration and Development Co. Ltd. - 1961 |
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| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1980-Oct-22 |
| Date Last Modified | 2023-Aug-24 |
| Created By | |
| Revised By |
Primary Commodities: Silver, Cobalt
Township or Area: Coleman, Coleman, Coleman
Latitude: 47° 24' 8.59" Longitude: -79° 39' 40.59"
UTM Zone: 17 Easting: 601010 Northing: 5250750 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M05NE
Point Location Description: Shaft
Location Method: AMIS Site Visit
1906: Cobalt Monarch Mining Co. – DD-2-217’; 1909: Watash Cobalt Mines Ltd. – DD-2-1021 ft.; 1941-1943 – Sycee Cobalt Silver Mines Ltd. – extended the 385’ level cross cut; UGD-7-4261 ft. 1954: Big Agaunico Mines – drilling. 1961-63: Mentor shaft sunk to 411’; 1200 ft. of crosscutting; DD56-11,521 ft. 1966: Mentor Exploration and Development – DD-8-5524 ft. Assays 411g Ag over12m; 5% Co over 0.23m, 1962: U/G DD;
Province: Southern
Subprovince: Cobalt Basin
Supergroup: Huronian Supergroup
Formation Group: Cobalt Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Conglomerate | 1 | Cobalt | Hanging Wall |
|---|---|---|---|---|
| Claystone | 2 | Hanging Wall | ||
| Intermediate lava flow-unsubdivided | 3 | Footwall | ||
| Diabase | 4 | Cobalt Series-Nipissing Diabase | Footwall | |
| Vein | 5 | Quartz | Host |
Aug 03, 2017 (A Wilson) - Flat lying Cobalt conglomerate and argillite about 450’ thick overlie Keewatin volcanics and are intruded by the Nipissing quartz diabase sill in the south part of the property. The Cobalt Series-Nipissing diabase sill contact strikes east-west and dips gently south. The Cobalt Series-Nipissing diabase sill contact strikes east-west and dips gently south. The major Cross Lake Fault strikes north-northwest across the property and about 150’ west of the Mentor shaft. A Keweenawan olivine diabase dike strikes north-northwest across the property and about 150 ft. west of the mentor shaft. A Keweenawan olivine diabase dike strikes parallel to the fault, and occurs about 100 ft. west of it. Local mineralization of silver and cobalt occur.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Silver | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Gangue | ||||
| 4 | Specularite | Economic | Gangue |
Aug 03, 2017 (A Wilson) - In hole W-1 a 5 inch intersection of massive cobalt mineralization was found; it assayed 12 oz./t Ag. In Sycee hole #3 a nine inch intersection of 5% cobalt occurred with native silver 80” below the W-1 intersection and also 1.46% Co over 5 ft. width.
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1942 | 300 | MDI |
File - Resident Geologist files CO-0716, CO-0812
Publication Number: Date:
Author:
Publisher Name:
Location: Kirkland Lake RGP office
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 232-233, 260 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: 27-32 Date: 1998
Author: Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
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:
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