Ontario Geological Survey
Permanent Link to this Record:
MDI31M05SE00002
| Record Name(s) | Silverfields - 1984, Alexandra - 1983, Teck - 1983, Carl Reinhardt - 1983 |
|---|---|
| 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: Nickel, Copper, Bismuth, Antimony
Township or Area: Coleman
Latitude: 47° 22' 27.22" Longitude: -79° 40' 30.46"
UTM Zone: 17 Easting: 600018 Northing: 5247603 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M05SE
Point Location Description: Alexandra Shaft
Location Method: AMIS Site Visit
1906-22: Alexandra Silver Mining Co. completed surface prospecting, shaft sinking, and adit driving. Alexandra shaft was sunk to 310 ft. 1962-1964: Silverfields mining co. drifting, cross-cutting, underground drilling, production. 1965-1967: Silverfields Mining Co. Continued production and shaft deepening. 1983: production ceased.
Province: Southern
Subprovince: Cobalt Basin
Supergroup: Huronian Supergroup
Formation Group: Cobalt Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Siltstone | 1 | Host |
|---|---|---|---|---|
| Conglomerate | 2 | Host | ||
| Diabase | 3 | Diabase | Near |
Dec 30, 2019 (Sheree Hinz) - Keewatin volcanics and Cobalt sediments are intruded hy Nipissing diabase. The Cobalt sediments, about 200 feet thick, occupy a north-trending paleovalley in the surface of the underlying Keewatin volcanics. Subvertical major faults strike NW; subvertical secondary faults strike E and intersect veins at acute angles where often high-grade pockets of silver occur. Production Is restricted to the Cobalt Series Sediments.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Bismuthinite | Economic | Gangue | ||||
| 2 | Bismuth | Economic | Gangue | ||||
| 3 | Tetrahedrite | Economic | Gangue | ||||
| 4 | Arsenopyrite | Economic | Gangue | ||||
| 6 | Silver | Economic | Gangue | ||||
| 7 | Chalcopyrite | Economic | Gangue |
Dec 30, 2019 (Sheree Hinz) - Silver-arsenide veins are principally hosted within a unit of Lower Proterozoic laminated siltstones and conglomerates.
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1968 | 1170378 | Canadian Mines Handbooks 1969-1983 | Total silver production from 1968-1983; total copper production from 1974-1982 | |
| 1966 | 7828 |
Silver 112351823 Cobalt 53000 Copper 54778 Nickel 1509 |
MRC 10, P.88-89 | TOTAL PRODUCTION 1964-1966 |
File - Resident Geologist files CO-0755, CO-0786
Publication Number: Date:
Author:
Publisher Name:
Location: Kirkland Lake RGP Office
Map - Cobalt silver area, southwestern sheet, Timiskaming District
Publication Number: M2051 Scale: 1:12,000 Date: 1997
Author: Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
Book - CIM 1967, CENT.FIELD EXCURSION
Publication Number: CIM Date: 1967
Author:
Publisher Name:
Location:
Thesis - Sulfide Mineralization in the Huronian Sediments at Silverfields Mine, Cobalt Ontario
Publication Number: MSc Thesis Date: 1972
Author: Harlein, A.J.
Publisher Name: University of Toronto
Location: Kirkland Lake RGP Office
Book - H. Moore, personal communication 1991
Publication Number: Date: 1991
Author:
Publisher Name:
Location:
Book - Northern Miner 78-05-04, Silverfields, p. 24
Publication Number: NMINER Date: 1978
Author:
Publisher Name: Northern Miner
Location:
Mono - Preliminary report on parts of Coleman Township, concession 4, lots 1 to 5, and Gillies Limit, the eastern "A" claims, District of Timiskaming
Publication Number: PR1961-06 Page: 83-86 Date: 1998
Author: Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 84-86, 88-89 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: 79 Date: 1997
Author: Lovell H.L., Ploeger F.R.
Publisher Name: Ontario Geological Survey
Location:
Compend - Report of activities, 1983, Regional and Resident Geologists
Publication Number: MP117 Page: 170, 175 Date: 1984
Author: Kustra C.R.
Publisher Name: Ontario Geological Survey
Location:
Vol - Ontario geoscience research grant program, final research reports, 1980
Publication Number: OFR5349 Page: 1 Date: 1981
Author:
Publisher Name: Ontario Geological Survey
Location:
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