Ontario Geological Survey
Permanent Link to this Record:
MDI31M05SE00142
| Record Name(s) | Duchess Silver Mining Co. Ltd. - 1907, Temiskaming Mining Co. Ltd. - 1914, Wildor Gold Mines Ltd. - 1951, C. Reinhardt Estate - 1968 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 1980-Oct-23 |
| Date Last Modified | 2023-Aug-31 |
| Created By | |
| Revised By |
Primary Commodities: Silver
Secondary Commodities: Cobalt, Copper, Lead
Township or Area: Coleman
Latitude: 47° 21' 21.5" Longitude: -79° 38' 29.35"
UTM Zone: 17 Easting: 602593 Northing: 5245618 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M05SE
Point Location Description: Duchess Shaft
Location Method: Data Compilation
1907-1910: No. 1 Duchess Shaft sunk 250 ft.; No 2 Duchess Shaft sunk 80 ft; No. 3 Duchess sunk 100 ft. 1951: No. 1 Duchess Shaft dewatered; underground diamond-drilling; drilling done from the surface and the 400’ level of the adjacent Cobalt Lode Mine. 1951: option given by Carl Reinhardt to Wildor Gold Mines Ltd.: headframe erected, shaft dewatered; diamond drilling program conducted. 1972-1989: Agnico Eagle
Province: Southern
Subprovince: Cobalt Basin
Supergroup: Huronian Supergroup
Formation Group: Cobalt Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Intermediate pillowed flow | 1 | Andesite | Pillowed | Hanging Wall |
|---|---|---|---|---|
| Diabase | 2 | Diabase | Intrudes | |
| Diorite | 3 | Diortite | Intrudes |
Aug 01, 2017 (A Wilson) - Steeply dipping Keewatin pillowed andesite that strikes south-east and faces northeast is intruded by small Haileyburian lamprophyre dikes. Small granite dikes related to the Lorrain granite batholith to the east cut the andesite and lamprophyre. The southern continuation of the Beaver dike (Matachewan type) cuts the claim in a north0-south direction. The above rocks are in turn underlain by Nipissing diabase in the form of an arch with N-S axis. Three faults occur; one passes through No. 1 shaft bearing N12ºE with a dip of 72º E and a second extends southwest from No. 2 Cochrane shaft into the northeast corner of the claim where it joins a fault extending northwest.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Silver | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Galena | Economic | Gangue | ||||
| 5 | Pyrite | Economic | Gangue |
Aug 01, 2017 (A Wilson) - Occurrences of cobalt and silver are known on this claim but production has been limited to negligible quantities from the extension of the Cochrane No. 2 shaft vein into the northeast corner of the claim. The No. 1 Duchess shaft vein follows a well-marked fault; it contains plentiful pyrite and chalcopyrite mineralization in addition to minor galena. The gangue is largely calcite with some quartz; the calcite is commonly coarsely crystalline. In places the vein is a calcite breccia with disseminated wall rock mineralization. The shaft follows the irregular vein down its easterly dip of about 81º for 240 feet; there is about 80 feet of drifting on the 100-foot level along the vein. The bottom of the shaft, about 235 feet vertically below the collar is 315 feet above the top contact of the Nipissing diabase. The No. 2 Duchess Shaft vein lies in the northeast corner of the claim; it is a direct extension of the No. 2 Cochrane shaft vein, the strike is northerly and the dip77º E. This vein might more properly be called a lode since it is made up of numerous irregular veins. The quartz-calcite gangue is mineralized with pyrite and chalcopyrite. The vein has been followed for a depth of 70 feet and drifted on for a length of about 100 feet at this level; cobalt mineralization occurs in small amounts. The vein contains chalcopyrite and pyrite. At No. 3 shaft, a quart z vein, strikes N.30 ºE., is probably a branch from the No. l shaft vein.
| Rank | Classification |
|---|---|
| 1 | Vein (Cobalt-Type) |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1977 | 11672 | |||
| 1907 | 1 |
Silver 7127858 Ounces Cobalt 139472 Pounds |
MDI | Tonnage not available. 7,127,858 oz. Ag; 139,472 lbs Co. |
File - Resident Geologist file CO-0649
Publication Number: Date:
Author:
Publisher Name:
Location: Kirkland Lake RGP office
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 - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 278 Date: 1968
Author: Sergiades A.O.
Publisher Name: Ontario Dept. of Mines
Location:
Article - Cobalt Resident Geologist's District - 1988
Publication Number: MP142.014 Page: 303 Date: 1997
Author: Owsiacki L., Cosec M., Anderson D.P.
Publisher Name: Ontario Geological Survey
Location:
Mono - Preliminary report on parts of Coleman Township, concession 3, lots 1 to 3, and Gillies Limit, blocks 1 and 2; claims A 48 to 58 and A 88 to 100, District of Timiskaming
Publication Number: PR1961-07 Page: 32-35 Date: 1998
Author: Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
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